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Jud Heinrichs

  • Professor of Dairy Science
Jud Heinrichs
324 Henning Building
University Park, PA 16802
Email:
Work Phone: 814-863-3916

Areas of Expertise

  • Heifer nutrition and management
  • Effective fiber for dairy cows

Education

  1. Ph.D., Dairy Science, Ohio State University, 1982
  2. M.S., Dairy Science, Ohio State University, 1980
  3. B.S., Animal Science, Cornell University, 1977

Areas of Interest

  • Heifer Management
  • Forages

Biography

Jud is a native of Sullivan County New York, where he was raised on a small Holstein farm.

Jud has been with Penn State since 1982 working in the areas of dairy nutrition and management with an emphasis in replacements; as well as dairy forages with an emphasis on diet particle size and physically effective fiber. Jud's interest in the growth and management of dairy heifers has allowed him to work on several population studies of growth rates of dairy heifers as well as revise the Holstein weight tapes currently used worldwide. He is also a co-inventor of the Penn State Forage and TMR Particle Size Separator.

Jud spent a sabbatical from 2008 to 2009 at the University of Bologna in Italy studying physically effective fiber needs of lactating cows. During a previous sabbatical from 1991 to 1992 with the USDA, he was in charge of the National Dairy Heifer Evaluation Project. He has authored over 135 journal articles and book chapters as well as many extension publications, primarily in the area of dairy replacements and forages.

Research

Calf/Heifer Nutrition and Management; Forage Feeding Management

Extension

Dairy Nutrition, Dairy Calf and Heifer Management

Dr. Heinrichs has sponsored the construction of the Dairy Cattle Nutrition Web site at http://www.das.psu.edu/dairynutrition , which provides a great deal of information about dairy cattle nutrition for the dairy producer.

Honors and Awards

  • 2013 American Dairy Science Association's Dairy Extension Award
  • 2009 American Dairy Science Association's Dairy Forage Award
  • 2002 Pennsylvania Dairyman’s Association Extension Award
  • 2000 American Dairy Science Association's Applied Dairy Nutrition Award

Employment

  • The Pennsylvania State University, Professor, 1994 to present
  • The Pennsylvania State University, Associate Professor, 1988 to 1994
  • The Pennsylvania State University, Assistant Professor, 1982 to 1988
  • Liberty Mills, Nutrition Consultant, 1979 to 1982
  • Agricultural Technical Institute, Instructor, 1980 to 1981
  • The Ohio State University, Graduate Research Assistant, 1977 to 1982

Graduate Students

Current Students:

  • Javier Suarez-Mena - B.S. Zamorano University
  • Alanna Kmicikewycz - M.S. University of Minnesota
  • Sonia Gelsinger - B.S. University of Wisconsin, Madison
  • Felipe Pino San Martin - DVM University of Chile

Previous Students:

  • Gustavo Lascano (Ph.D. 2011), Assistant Professor, Animal and Veterinary Science Department, Clemson University
  • Daryl Maulfair (Ph.D. 2011), Dairy Nutritionist, Red Dale Ag Service
  • Jorge Elizondo Salazar (Ph.D. 2008), Professor, Animal Science Department, Experiment Station Director, University of Costa Rica
  • Geoff Zanton (Ph.D. 2008), Research Scientist USDA Dairy Forage Lab, Madison Wisconsin
  • Sylvia (Wawrzyniak) Kehoe (Ph.D. 2006), Associate Professor, Department of Animal and Food Science, University of Wisconsin-River Falls
  • Meghan Moody (M.S. 2006), Eastern Sales Manager, Virtus Nutrition
  • Keith Lesmeister (Ph.D. 2003), Dairy Nutritionist, Brown's Feed Inc.
  • Paul Kononoff (Ph.D. 2002), Associate Professor, Animal Science Department, University of Nebraska
  • Matt Gabler (Ph.D. 2002), Dairy Sales Leader, Upper Midwest, Cargill
  • Brian Lammers (Ph.D. 1998), Dairy Nutritionist, ADM Alliance Inc.
  • Julie Ann Longenbach (M.S. 1996), Nutritionist
  • Nick Place (M.S. 1994), Dean, University of Florida Extension and Director, Florida Cooperative Extension at University of Florida
  • Dean Ross (M. Agr. 1992), Dairy Consultant
  • Mercedes Vasquez-Anon (M.S. 1992), Director, Animal Research, Novus International Inc.
  • Cherie Ziemer (M.S. 1990), formerly Microbiologist, USDA Agricultural Research Service; Diseased
  • Larry Swartz (M.S. 1989), Regional Marketing Manager, Genex/CRI
  • Rich Meinert (M.S. 1988), Extension Educator, University of Connecticut

Graduate Committees:

  • 2010: Houser, B. A.; Ph.D. in Veterinary and Biological Sciences
  • 2009: Calitz, T.; M.S. in Animal Science, University of Stellenbosch, South Africa
  • 2009: Graeff, A.; M.S. in Animal Science
  • 2008: Edwards, T. D.; M.S. in Animal Science
  • 2007: Patel, K. N.; M.S. in Animal Science
  • 2006: Suarez-Cretton, B. J.; Ph.D. Wageningen University, The Netherlands
  • 2005: Sward, M. L.; M.S. in Agricultural and Biological Engineering
  • 2003: Vassallo, M.; M.S. in Agricultural and Biological Engineering
  • 2001: Booth, J. A.; Ph.D. in Animal Science, Iowa State University
  • 2001: Zhang, M.; Ph.D. in Agricultural and Biological Engineering
  • 2000: Lategan, E.; M. S. in Animal Science, University of Stellenbosch, South Africa
  • 2000: Holtshausen, L.; M. S. in Animal Science, University of Stellenbosch, South Africa

Memberships

  • American Dairy Science Association
  • American Registry Of Professional Animal Scientists
  • Pennsylvania Extension Professors Association
  • Gamma Sigma Delta

Recent Publications

Articles published in refereed journals:

  • Maulfair, D. D., and A. J. Heinrichs. 2013. Eating behavior, ruminal fermentation, and milk production in lactating dairy cows fed rations that varied in dry alfalfa hay and alfalfa silage content. Livest. Sci. 151:179–187.
  • Suarez-Mena, F. X., G. I. Zanton, and A. J. Heinrichs. 2013. Effect of forage particle length on rumen fermentation, sorting and chewing activity of late-lactation and non-lactating dairy cows. Animal. 7:272–278.
  • Vallimont, J. E., C. D. Dechow, J. M. Daubert, M. W. Dekleva, J. W. Blum, W. Liu, G. A. Varga, A. J. Heinrichs, and C. R. Baumrucker. 2013. Short communication: Feed utilization and its associations with fertility and productive life in 11 commercial Pennsylvania tie-stall herds. J. Dairy Sci. 96:1251–1254.
  • Lascano, G. J., A. J. Heinrichs, and J. M. Tricarico. 2012. Substitution of starch by soluble fiber and Saccharomyces cerevisiae dose response on nutrient digestion and blood metabolites for precision-fed dairy heifers. J. Dairy Sci. 95:3298–3309.
  • Lascano, G. J., M. Velez, J. M. Tricarico, and A. J. Heinrichs. 2012. Short communication: Nutrient utilization of fresh sugarcane-based diets with slow-release nonprotein nitrogen addition for control-fed dairy heifers. J. Dairy Sci. 95:370–376.
  • Heinrichs, A. J., and B. S. Heinrichs. 2011. A prospective study of calf factors affecting first-lactation and lifetime milk production and age of cows when removed from the herd. J. Dairy Sci. 94:336–341.
  • Lascano, G. J., and A. J. Heinrichs. 2011. Effects of feeding different levels of dietary fiber through the addition of corn stover on nutrient utilization of dairy heifers precision-fed high and low concentrate diets. J. Dairy Sci. 94:3025–3036.
  • Maulfair, D. D., M. Fustini, and A. J. Heinrichs. 2011. Effect of varying total mixed ration particle size on rumen digesta and fecal particle size and digestibility in lactating dairy cows. J. Dairy Sci. 94:3527–3536.
  • Quezada-Mendoza, V. C., A. J. Heinrichs, and C. M. Jones. 2011. The effects of a prebiotic supplement (Prebio Support) on fecal and salivary IgA in neonatal dairy calves. Livest. Sci. 142:222–228.
  • Suarez-Mena, F. X., T. M. Hill, A. J. Heinrichs, H. G. Bateman, J. M. Aldrich, and R. L. Schlotterbeck. 2011. Effects of including corn distillers dried grains with solubles in dairy calf feeds. J. Dairy Sci. 94:3037–3044.
  • Vallimont, J. E., C. D. Dechow, J. M. Daubert, M. W. Dekleva, J. W. Blum, C. M. Barlieb, W. Liu, G. A. Varga, A. J. Heinrichs, and C. R. Baumrucker. 2011. Short communication: Heritability of gross feed efficiency and associations with yield, intake, residual intake, body weight, and body condition score in 11 commercial Pennsylvania tie stalls. J. Dairy Sci. 94:2108–2113.
  • Elizondo-Salazar, J. A., C. M. Jones, and A. J. Heinrichs. 2010. Evaluation of calf milk pasteurization systems on 6 Pennsylvania dairy farms. J. Dairy Sci. 93:5509–5513.
  • Elizondo-Salazar, J. A., B. M. Jayarao, and A. J. Heinrichs. 2010. Effect of heat treatment of bovine colostrum on bacterial counts, viscosity, and immunoglobulin G concentration. J. Dairy Sci. 93:961–967.
  • Lascano, G. J., G. I. Zanton, A. J. Heinrichs, and W. P. Weiss. 2010. A noninvasive urine collection device for female cattle: modification of the urine cup collection method. J. Dairy Sci. 93:2691–2694.
  • Maulfair, D. D., G. I. Zanton, M. Fustini, and A. J. Heinrichs. 2010. Effect of feed sorting on chewing behavior, production, and rumen fermentation in lactating dairy cows. J. Dairy Sci. 93:4791–4803.
  • Maulfair, D. D., and A. J. Heinrichs. 2010. Evaluation of procedures for analyzing ration sorting and rumen digesta particle size in dairy cows. J. Dairy Sci. 93:3784–3788.
  • Vallimont, J. E., C. D. Dechow, J. M. Daubert, M. W. Dekleva, J. W. Blum, C. M. Barlieb, W. Liu, G. A. Varga, A. J. Heinrichs, and C. R. Baumrucker. 2010. Genetic parameters of feed intake, production, body weight, body condition score, and selected type traits of Holstein cows in commercial tie-stall barns. J. Dairy Sci. 93:4892–4901.
  • Zanton, G. I., and A. J. Heinrichs. 2010. Analysis of milk yield and composition for dairy heifers limit-fed lower forage diets during the rearing period. J. Dairy Sci. 93:4730–4734.
  • Elizondo-Salazar, J. A., and A. J. Heinrichs. 2009. Feeding heat-treated colostrum to neonatal dairy heifers: effects on growth characteristics and blood parameters. J. Dairy Sci. 92:3265–3273.
  • Elizondo-Salazar, J. A., and A. J. Heinrichs. 2009. Feeding heat-treated colostrum or unheated colostrum with two different bacterial concentrations to neonatal dairy calves. J. Dairy Sci. 92:4565–4571.
  • Heinrichs, A. J., S. S. Costello, and C. M. Jones. 2009. Control of heifer mastitis by nutrition. Vet. Microbiol. 134:172–176.
  • Heinrichs, A. J., and J. A. Elizondo-Salazar. 2009. Reducing failure of passive immunoglobulin transfer in dairy calves. Rev. Med. Vet. 160:436–440.
  • Heinrichs, A. J., C. M. Jones, J. A. Elizondo-Salazar, and S. J. Terrill. 2009. Effects of a prebiotic supplement on health of neonatal dairy calves. Livest. Sci. 125:149–154.
  • Lascano, G. J., G. I. Zanton, and A. J. Heinrichs. 2009. Concentrate levels and Saccharomyces cerevisiae affect rumen fluid-associated bacteria numbers in dairy heifers. Livest. Sci. 126:189–194.
  • Lascano, G. J., and A. J. Heinrichs. 2009. Rumen fermentation pattern of dairy heifers fed restricted amounts of low, medium, and high concentrate diets without and with yeast culture. Livest. Sci. 124:48–57.
  • Lascano, G. J., G. I. Zanton, F. X. Suarez-Mena, and A. J. Heinrichs. 2009. Effect of limit feeding high- and low-concentrate diets with Saccharomyces cerevisiae on digestibility and on dairy heifer growth and first-lactation performance. J. Dairy Sci. 92:5100–5110.
  • Terrill, S. J., A. J. Heinrichs, and M. R. Long. 2009. A review of synbiotic supplements on faecal immunoglobulin A in bovine neonates. CAB Rev. Perspect. Agric. Vet. Sci. Nutr. Nat. Resour. doi:10.1079/PAVSNNR20094003
  • Zanton, G. I., and A. J. Heinrichs. 2009. Limit-feeding with altered forage-to-concentrate levels in dairy heifer diets. Prof. Anim. Sci. 25:393–403.
  • Zanton, G. I., and A. J. Heinrichs. 2009. Evaluation of modeling procedure for fitting in situ feed degradation profiles. J. Anim. Sci. 87:2080–2088.
  • Zanton, G. I., and A. J. Heinrichs. 2009. Digestion and nitrogen utilization in dairy heifers limit-fed a low or high forage ration at four levels of nitrogen intake. J. Dairy Sci. 92:2078–2094.
  • Elizondo-Salazar, J. A., B. M. Jayarao, and A. J. Heinrichs. 2008. Effect on bacterial count and immunoglobulin G concentration. Rev. Electron. Vet. REDVET. 9(9). http://www.veterinaria.org/revistas/redvet/n090908/090903.pdf .
  • Elizondo-Salazar, J. A., and A. J. Heinrichs. 2008. Heat treating bovine colostrum. Prof. Anim. Sci. 24:530–538.
  • Heinrichs, A. J., S. M. Emanuele, and C. M. Jones. 2008. Altering protein and sugar in postpubertal dairy heifer diets. Prof. Anim. Sci. 24:219–223.
  • Houser, B. A., S. C. Donaldson, S. I. Kehoe, A. J. Heinrichs, and B. M. Jayarao. 2008. A survey of bacteriological quality and the occurrence of Salmonella in raw bovine colostrum. Foodborne Path. Dis. 5:853–858.
  • Kehoe, S. I., A. J. Heinrichs, C. R. Baumrucker, and D. L. Greger. 2008. Effects of nucleotide supplementation in milk replacer on small intestinal absorptive capacity in dairy calves. J. Dairy Sci. 91:2759–2770.
  • Lascano, G. J., G. I. Zanton, M. L. Moody, P. A. Topper, E. F. Wheeler, and A. J. Heinrichs. 2008. Effect of changing the ratio of forage to concentrate on ammonia emissions by dairy heifers. J. Dairy Sci. 91:4301–4306.
  • Zanton, G. I., and A. J. Heinrichs. 2008. Rumen digestion and nutritional efficiency of dairy heifers limit-fed a high forage ration to four levels of dry matter intake. J. Dairy Sci. 91:3579–3588.
  • Zanton, G. I., and A. J. Heinrichs. 2008. Analysis of nitrogen utilization and excretion in growing dairy cattle. J. Dairy Sci. 91:1519–1533.
  • Heinrichs, A. J., H. N. Erb, G. W. Rogers, J. B. Cooper, and C. M. Jones. 2007. Variability in Holstein heifer heart-girth measurements and comparison of prediction equations for live weight. Prev. Vet. Med. 78:333–338.
  • Heinrichs, A. J., S. I. Kehoe, A. M. Gehman, C. M. Jones, and J. M. Tricarico. 2007. Effects of amylase on rumen development in neonatal dairy calves. Prof. Anim. Sci. 23:64–69.
  • Kehoe, S. I., B. M. Jayarao, and A. J. Heinrichs. 2007. A survey of bovine colostrum composition and colostrum management practices on Pennsylvania dairy farms. J. Dairy Sci. 90:4108–4116.
  • Kehoe, S. I., and A. J. Heinrichs. 2007. Bovine colostrum nutrient composition. CAB Rev. Perspect. Agric. Vet. Sci. Nutr. Nat. Resour. doi:10.1079/PAVSNNR20072029
  • Kehoe, S. I., C. D. Dechow, and A. J. Heinrichs. 2007. Effects of weaning age and milk feeding frequency on dairy calf growth, health and rumen parameters. Livest. Sci. 110:267–272.
  • Lascano, G. J., and A. J. Heinrichs. 2007. Yeast culture (Saccharomyces cerevisiae) supplementation in growing animals in the dairy industry. CAB Rev. Perspect. Agric. Vet. Sci. Nutr. Nat. Resour. doi:10.1079/PAVSNNR20072049
  • Moody, M. L., G. I. Zanton, J. M. Daubert, and A. J. Heinrichs. 2007. Nutrient utilization of differing forage-to-concentrate ratios by growing Holstein heifers. J. Dairy Sci. 90:5580–5586.
  • Zanton, G. I., and A. J. Heinrichs. 2007. The effects of controlled feeding of a high-forage or high-concentrate ration on heifer growth and first-lactation milk production. J. Dairy Sci. 90:3388–3396.
  • Zanton, G. I., M. T. Gabler, and A. J. Heinrichs. 2007. Manipulation of soluble and rumen-undegradable protein in diets fed to postpubertal dairy heifers. J. Dairy Sci. 90:978–986.
  • Kononoff, P. J., A. J. Heinrichs, and M. T. Gabler. 2006. The effects of nitrogen and forage source on feed efficiency and structural growth of prepubertal Holstein heifers. Prof. Anim. Sci. 22:84-88.
  • Bailey, K. W., C. M. Jones, and A. J. Heinrichs. 2005. Economic returns to Holstein and Jersey herds under multiple component pricing. J. Dairy Sci. 88:2269–2280.
  • Heinrichs, A. J., B. S. Heinrichs, O. Harel, G. W. Rogers, and N. T. Place. 2005. A prospective study of calf factors affecting age, body size, and body condition score at first calving of holstein dairy heifers. J. Dairy Sci. 88:2828–2835.
  • Lesmeister, K. E., and A. J. Heinrichs. 2005. Effects of adding extra molasses to a texturized calf starter on rumen development, growth characteristics, and blood parameters in neonatal dairy calves. J. Dairy Sci. 88:411–418.
  • Nennich, T. D., J. H. Harrison, L. M. VanWieringen, D. Meyer, A. J. Heinrichs, W. P. Weiss, N. R. St-Pierre, R. L. Kincaid, D. L. Davidson, and E. Block. 2005. Prediction of manure and nutrient excretion from dairy cattle. J. Dairy Sci. 88:3721–3733.
  • Zanton, G. I., and A. J. Heinrichs. 2005. Meta-analysis to assess effect of prepubertal average daily gain of Holstein heifers on first-lactation production. J. Dairy Sci. 88:3860–3867.
  • Lesmeister, K. E., and A. J. Heinrichs. 2004. Effects of corn processing on growth characteristics, rumen development, and rumen parameters in neonatal dairy calves. J. Dairy Sci. 87:3439–3450.
  • Lesmeister, K. E., P. R. Tozer, and A. J. Heinrichs. 2004. Development and analysis of a rumen tissue sampling procedure. J. Dairy Sci. 87:1336–1344.
  • Lesmeister, K. E., A. J. Heinrichs, and M. T. Gabler. 2004. Effects of supplemental yeast (Saccharomyces cerevisiae) culture on rumen development, growth characteristics, and blood parameters in neonatal dairy calves. J. Dairy Sci. 87:1832–1839.
  • Gabler, M. T., and A. J. Heinrichs. 2003. Effects of increasing dietary protein on nutrient utilization in heifers. J. Dairy Sci. 86:2170–2177.
  • Gabler, M. T., and A. J. Heinrichs. 2003. Altering soluble and potentially rumen degradable protein for prepubertal Holstein heifers. J. Dairy Sci. 86:2122–2130.
  • Gabler, M. T., and A. J. Heinrichs. 2003. Dietary protein to metabolizable energy ratios on feed efficiency and structural growth of prepubertal Holstein heifers. J. Dairy Sci. 86:268–274.
  • Heinrichs, A. J., C. M. Jones, and B. S. Heinrichs. 2003. Effects of mannan oligosaccharide or antibiotics in neonatal diets on health and growth of dairy calves. J. Dairy Sci. 86:4064–4069.
  • Kononoff, P. J., A. J. Heinrichs, and H. A. Lehman. 2003. The effect of corn silage particle size on eating behavior, chewing activities, and rumen fermentation in lactating dairy cows. J. Dairy Sci. 86:3343–3353.
  • Kononoff, P. J., A. J. Heinrichs, and D. R. Buckmaster. 2003. Modification of the Penn State forage and total mixed ration particle separator and the effects of moisture content on its measurements. J. Dairy Sci. 86:1858–1863.
  • Kononoff, P. J., and A. J. Heinrichs. 2003. The effect of corn silage particle size and cottonseed hulls on cows in early lactation. J. Dairy Sci. 86:2438–2451.
  • Kononoff, P. J., and A. J. Heinrichs. 2003. The effect of reducing alfalfa haylage particle size on cows in early lactation. J. Dairy Sci. 86:1445–1457.
  • Kononoff, P. J., H. A. Lehman, and A. J. Heinrichs. 2002. A comparison of methods used to measure eating and ruminating activity in confined dairy cattle. J. Dairy Sci. 85:1801–1803.
  • Tozer, P. R., and A. J. Heinrichs. 2001. What affects the costs of raising replacement dairy heifers: a multiple-component analysis. J. Dairy Sci. 84:1836–1844.
  • Gabler, M. T., P. R. Tozer, and A. J. Heinrichs. 2000. Development of a cost analysis spreadsheet for calculating the costs to raise a replacement dairy heifer. J. Dairy Sci. 83:1104–1109.
  • Lammers, B. P., and A. J. Heinrichs. 2000. The response of altering the ratio of dietary protein to energy on growth, feed efficiency, and mammary development in rapidly growing prepubertal heifers. J. Dairy Sci. 83:977–983.
  • Heinrichs, A. J., D. R. Buckmaster, and B. P. Lammers. 1999. Processing, mixing, and particle size reduction of forages for dairy cattle. J. Anim. Sci. 77:180–186.
  • Lammers, B. P., A. J. Heinrichs, and R. S. Kensinger. 1999. The effects of accelerated growth rates and estrogen implants in prepubertal Holstein heifers on growth, feed efficiency, and blood parameters. J. Dairy Sci. 82:1746–1752.
  • Lammers, B. P., A. J. Heinrichs, and R. S. Kensinger. 1999. The effects of accelerated growth rates and estrogen implants in prepubertal Holstein heifers on estimates of mammary development and subsequent reproduction and milk production. J. Dairy Sci. 82:1753–1764.
  • Longenbach, J. I., A. J. Heinrichs, and R. E. Graves. 1999. Feed bunk length requirements for Holstein dairy heifers. J. Dairy Sci. 82:99–109.
  • Heinrichs, A. J., and W. C. Losinger. 1998. Growth of Holstein dairy heifers in the United States. J. Anim. Sci. 76:1254–1260.
  • Lammers, B. P., A. J. Heinrichs, and A. Aydin. 1998. The effect of whey protein concentrate or dried skim milk in milk replacer on calf performance and blood metabolites. J. Dairy Sci. 81:1940–1945.
  • Longenbach, J. I., and A. J. Heinrichs. 1998. A review of the importance and physiological role of curd formation in the abomasum of young calves. Anim. Feed Sci. Tech. 73:85–97.
  • Place, N. T., A. J. Heinrichs, and H. N. Erb. 1998. The effects of disease, management, and nutrition on average daily gain of dairy heifers from birth to four months. J. Dairy Sci. 81:1004–1009.
  • Losinger, W. C., and A. J. Heinrichs. 1997. Factors associated with high scours mortality among preweaned dairy heifers. Arch. Zootec. 46:311–322.
  • Losinger, W. C., and A. J. Heinrichs. 1997. An analysis of age and body weight at first calving for Holsteins in the United States. Prev. Vet. Med. 32:193–205.
  • Losinger, W. C., and A. J. Heinrichs. 1997. Management practices associated with high mortality among preweaned dairy heifers. J. Dairy Res. 64:1–11.
  • Terosky, T. L., A. J. Heinrichs, and L. L. Wilson. 1997. A comparison of milk protein sources in diets of calves up to eight weeks of age. J. Dairy Sci. 80:2977–2983.
  • Erb, H. N., A. J. Heinrichs, R. E. Woods, and W. M. Sischo. 1996. Test-retest repeatability of the National Animal Health Monitoring System Dairy Heifer Health Report in New York and Pennsylvania, USA. Prev. Vet. Med. 25:291–300.
  • Heinrichs, A. J. 1996. Nutrition and management of replacement cattle. Anim. Feed Sci. 59:155–166.
  • Heinrichs, A. J., N. E. Kiernan, and V. A. Ishler. 1996. Keys to developing an effective dairy satellite extension program. J. Dairy Sci. 79:1981–1987.
  • Lammers, B. P., D. R. Buckmaster, and A. J. Heinrichs. 1996. A simple method for the analysis of particle sizes of forage and total mixed rations. J. Dairy Sci. 79:922–928.
  • Lammers, B. P., J. W. vanKoot, A. J. Heinrichs and R. E. Graves. 1996. The effect of different types of calf hutches on heat stress. Appl. Engineering in Agr. 12:741-745.
  • Losinger, W. C., and A. J. Heinrichs. 1996. Dairy operation management practices and herd milk production. J. Dairy Sci. 79:506–514.
  • Losinger, W. C., and A. J. Heinrichs. 1996. Management variables associated with high mortality rates attributable to respiratory tract problems in female calves prior to weaning. J. Am. Vet. Med. Assoc. 209:1756–1759.
  • Losinger, W. C., and A. J. Heinrichs. 1996. The management practices associated with herd milk production as determined from the National Dairy Heifer Evaluation Project. J. Dairy Sci. 79:506-514.

Abstracts:

  • Elizondo-Salazar, J. A., J. Sánchez-Salas, G. Arroyo-Quesada, E. González-Arias, and A. J. Heinrichs. 2012. Immune status of dairy calves in the northern plains of Costa Rica: Year 1. J. Dairy Sci. 95(Suppl. 2):510.
  • Hill, T. M., H. G. Bateman, II, J. M. Aldrich, and A. J. Heinrichs. 2012. Revising protein requirements of calves and heifers. J. Dairy Sci. 95(Suppl. 2):739.
  • Kmicikewycz, A. D., D. D. Maulfair, and A. J. Heinrichs. 2012. Evaluating particle size of dry and wet forages using the Ro-Tap separator and Penn State Particle Size Separator method. J. Dairy Sci. 95(Suppl. 2):290.
  • Lascano, G. J., and A. J. Heinrichs. 2012. Precision-feeding dairy heifers with different levels of dietary fiber and F:C. Effects on protein utilization, N efficiency, and rumen fermentation. J. Dairy Sci. 95(Suppl. 2):110.
  • Suarez-Mena, F. X., and A. J. Heinrichs. 2012. Effect of hay or corn silage in pre-weaned calf diets on eating behavior and rumen development. J. Dairy Sci. 95(Suppl. 2):543.
  • Elizondo-Salazar, J. A., J. Sánchez-Salas, J. Rodríguez-Zamora, and A. J. Heinrichs. 2011. Immune status of calves that naturally suckle their dams
    in dairy farms of Costa Rica. J. Dairy Sci. 94(Suppl. 1):519-520.
  • Suarez-Mena, F. X., G. J. Lascano, and A. J. Heinrichs. 2011. Chewing activities of dairy heifers precision-fed a low or high forage ration at four levels of dry distillers grain. J. Dairy Sci. 94(Suppl. 1):60.
  • Suarez-Mena, F. X., G. J. Lascano, and A. J. Heinrichs. 2011. Digestion and rumen fermentation in precision-fed dairy heifers on low or high forage rations at four levels of dry distillers grain. J. Dairy Sci. 94(Suppl. 1):130.
  • Fustini, M., A. Palmonari, A. J. Heinrichs, and A. Formigoni. 2010. Chewing and ruminating with various forage qualities in non-lactating dairy cows. J. Dairy. Sci. 93(Suppl. 1):49.

Popular Press Articles:

  • Heinrichs, J., J. Suarez, and C. Jones. 2012. We can improve feed efficiency in heifers. Hoard's Dairyman. 157:602.
  • Heinrichs, J., and C. Jones. 2011. Use pasteurizers effectively. Hoard's Dairyman. 156:442.
  • Heinrichs, J. 2010. TMR particle size and Italian cheese. Farmshine. 36(8):46. 
  • Heinrichs, J., and C. Jones. 2010. Pasteurizing colostrum: the next step to controlling disease. Hoards Dairyman. 155:859;  Hoard’s Dairyman en Espanol 191:714-715.
  • Heinrichs, J. and C. Jones. 2010. What’s in colostrum these days? Hoards Dairyman. 155:859.
  • Heinrichs, A. J. 2009. Dairy calf nutrition issues. Primus Agr Magazin. Munchen, Germany. Pp. 26-30.
  • Heinrichs, A. J. 2009. Dalla nascita allo svezzamento della vitella. (From Birth to weaning of calves) L’allevatore Trentino. Pp 32-33.
  • Heinrichs, A. J. 2009. Manage your calf health through nutrition. Progressive Dairyman. 23(6):42-43.
  • Heinrichs, A. J. 2009. Mastitis prevention: the nutritional approach. Feed Mix: The International Journal of Feed, Nutrition, and Technology. 16:15-17. 
  • Heinrichs, J. 2009. What’s in Pennsylvania colostrum. Farmshine Magazine. 35(5):29.
  • Zanton, G. I., and A. J. Heinrichs. 2009. Limit-feeding heifers: what we have learned and what we recommend. Hoard’s Dairyman. 154(7): 252. 
  • Elizondo-Salazar, J. A., and A. J. Heinrichs. 2008. It saves lives. Hoard’s Dairyman. 153:453.
  • Elizondo-Salazar, J. A., and A. J. Heinrichs. 2008. Make handling of post-pasteurized waste milk a priority. Progressive Dairyman. 22(8): 52-53.
  • Jones, C M. and A. J. Heinrichs. 2008. We’re learning more about growing healthy calves. Hoard’s Dairyman. 153:567.
  • Jones, C. M., and A. J. Heinrichs. 2008. Estamos aprendiendo mas de crianza de becerras sanas. Hoard’s Dairyman en Espanol. 168: 764-766.
  • Jones, C. M., A. J. Heinrichs, and G. W. Roth. 2008. Silage as a management option. Progressive Dairyman. 22(3): 52.
  • Heinrichs, A. J. 2007. Age at weaning and the cost of raising the milk fed dairy calf. Agribusiness Dairyman 12:20-21.
  • Heinrichs, A. J. 2007. Summertime silage feeding problems. Progressive Dairyman. 21(8): 37-38.
  • Jones, C., J. Heinrichs, and G. Roth. 2007. You’ve got to know your crop maturity. Hoards Dairyman. 152:574. 
  • Jones, C. M., and A. J. Heinrichs. 2007. Milk replacer prices jumped like never before. Farmshine. 28(38):4 
  • Jones, C. M., and A. J. Heinrichs. 2007. Waste milk is reasonable option to consider. Farmshine. 28(40):21-22.
  • Jones,C. M., A. J. Heinrichs, S. Kehoe, and J. Elizondo. 2007. Weaning earlier saves money. Hoards Dairyman. 152:482. 
  • Kononoff, P. J., A. J. Heinrichs, and G. A. Varga. 2007. Using manure evaluation to enhance dairy cattle nutrition. Progressive Dairyman. 21(1):34-37.
  • Heinrichs, A. J. 2006. Fiber for dairy calves. AgriBasics May Newsletter. Elizabethtown, PA.
  • Heinrichs, A. J., and A. F. Kertz. 2006. Protein for dairy calves. AgriBasics June Newsletter. Elizabethtown, PA
  • Jones C. M., and A. J. Heinrichs. 2006. All milk replacers are not created equal. Hoard’s Dairyman. 151:136. 
  • Jones, C. M., and A. J. Heinrichs. 2006. Higher components will make more money.  Hoard’s Dairyman. 151:761.
  • Jones C. M., and A. J. Heinrichs. 2006. Tackle the invisible losses of silage. Hoard’s Dairyman. 151:59. 
  • Jones, C. M., and A. J. Heinrichs. 2006. What’s going on in calf research today? Agribusiness Dairyman. 10:44-47. 
  • Jones C. M., A. J. Heinrichs, and V. A. Ishler. 2006. Pay attention to your silage moisture levels. Hoard’s Dairyman. 151:168-169. 
  • Zanton, G., and J. Heinrichs. 2006. Long term effects of rearing choices. Feedstuffs. 78:14-18.
  • Zanton, G. I., and A. J. Heinrichs. 2006. Is there a best growth rate for heifers? Hoard’s Dairyman. 151:82. 
  • Jones C., and A. J. Heinrichs. 2005. What might be wrong with your silage. Hoard’s Dairyman. 150:220. 
  • Zanton, G., and J. Heinrichs. 2005. Rearing choices matter: Part 1. Feedstuffs. 77(51):16-17.
  • Heinrichs, A. J. 2004. Yeast culture may affect rumen development. Feedstuffs. 76:11-14. 
  • Heinrichs, J., and C. Jones. 2004. Do’s and don’ts for weaning calves. Hoard’s Dairyman. 146:93.
  • Jones, C., and J. Heinrichs. 2004. What about waste milk for calves? Hoard’s Dairyman. 146:184-185.
  • Kononoff, P. J., and A. J. Heinrichs. 2004. TMR fiber: long enough to work without sorting. Hoard’s Dairyman. 149:640.
  • Gabler, M., P. Tozer, V. Ishler, and J. Heinrichs. 2003. Don’t overlook manure handling costs. Hoard’s Dairyman. 148:328 
  • Heinrichs, A. J. 2003. Early intake of starter should be a goal. Farmshine 25:15.
  • Heinrichs, A. J., and P. J. Kononoff. 2003. Early proper nutrition means paying attention to particle size. Farmshine 25:17.
  • Heinrichs, A. J., and P. J. Kononoff. 2003. Particle size can be measured for rations. Farmshine 24:5.
  • Heinrichs, J., and C. Jones. 2003. How the young calf’s stomach changes. Hoard’s Dairyman. 148:390.
  • Jones, C., and J. Heinrichs. 2003. How much milk should you feed young calves? Hoard’s Dairyman. 148:652-653. 
  • Jones, C., and J. Heinrichs. 2003. Why colostrum is so important. Hoard’s Dairyman. 148:468. 
  • Tozer, P., and J. Heinrichs. 2003. Don’t let heifer costs eat your profits. Hoard’s Dairyman. 148:139.  
  • Gabler, M. T., and A. J. Heinrichs. 2002. 2001, 1989 NRC requirements for dairy heifers compared. Feedstuffs. 74(10): 11-13.
  • Gabler, M. T., A. J. Heinrichs, and P. R. Tozer. 2002. Dairy heifer rates of gain affect later profitability. Feedstuffs. 74(2): 13 and 22.
  • Heinrichs, A. J. 2002. Manno oligosaccharides in the diets of dairy calves and their effects on growth and health. Biotechnologia en la Industria de la Alimentacion Animal. pp. 175-185.
  • Heinrichs, A. J. 2002. Pay attention to calves during cold weather. Farmshine 24:15. 
  • Heinrichs, A. J. 2002. Tomorrow’s productivity from today’s calf. Interntl. Dairy Topics. 7:23-25.  
  • Heinrichs, A. J., and P. J. Kononoff. 2002. Forage particle separators can tell us a lot. Hoard’s Dairyman. 147:82-83.
  • Kononoff, P. J., and A. J. Heinrichs. 2002. Forage particle add-on improves analysis. Hoard’s Dairyman. 147:620.
  • Kononoff, P. J., A. J. Heinrichs, and G. A. Varga. 2002. Manure can help solve nutrition puzzle. Farmshine. 24:18.
  • Heinrichs, A. J. 2001. Just what size should they be? Hoard’s Dairyman. Suppl. 10/25/01 pp. 14-15. 
  • Heinrichs, A. J., and K. Lesmeister. 2000. Why you should hold off on feeding forage to calves. Hoard’s Dairyman 145:(16)638.

Book Chapters:

  • Heinrichs, A. J., and C. M. Jones. 2009. Colostrum substitutes and milk replacers. Pages 367-373 in Large Animal Internal Medicine. Ed. B. P. Smith. Fourth Ed. Mosby Elsevier.
  • Heinrichs, A. J. 2009. Managing calf health through nutrition. Pages 25-31 in Ruminant Formula for the Future: nutrition or pathology. Ed. S. Andrieu and H. Warren. Wageningen Academic Publ.
  • Heinrichs, A. J. 2007. Dairy heifer nutrition. Pages 75-78 in Road Map to the Elite Herd. Rakuno Gakuen Univ. Press. Hokkaido, Japan.
  • Zanton, G. I., A. J. Heinrichs, and G. J. Lascano. 2007. A new paradigm for heifer nutrition: Cut manure output 20 to 40%. Pages 249–255 in Nutritional Biotechnology in the Feed and Food Industries. Nottingham Univ. Press.
  • Jones, C. M., and A. J. Heinrichs. 2006. Calf Care. W. D. Hoard & Son Co. Fort Atkinson WI.
  • Zanton, G. I., M. L. Moody, and A. J. Heinrichs. 2006. Improving animal feed efficiency with alternative dairy heifer feeding scenarios. Pages 353-358 in Nutritional Biotechnology in the Feed and Food Industries. Nottingham Univ. Press.
  • Heinrichs, A. J. 2005. Rumen development in the dairy calf. Pages 179-188 in Advances in Dairy Technology. Vol. 17. Univ. of Alberta.
  • Heinrichs, A. J., and K. E. Lesmeister. 2005. Rumen development in the dairy calf. Pages 53-67 in Calf and Heifer Rearing. Nottingham Univ. Press.
  • Kehoe, S. I., and A. J. Heinrichs. 2004. Gastrointestinal development in dairy calves. Pages 195-203 in Nutritional Biotechnology in the Feed and Food Industries. Nottingham Univ. Press.
  • Heinrichs, A. J., L. Doepel, and R. Corbett. 2001. Milk Replacers Pages 382-386 in Large Animal Internal Medicine. Third Ed. Harcourt Co.
  • Heinrichs, A. J., and O. M. Radostits . 2001. Health and management of dairy calves and replacement heifers in Heard Health 3rd edition. W. B. Saunders Co.

Conference Proceedings:

  • Heinrichs, A. J., and G. J. Lascano. 2009. Rumen development and health for optimal growth and rumen microbial production in dairy replacements.Pages 79–82 in Proc. 14th Intl. Cong. Intl. Soc. Anim. Hygiene.
  • Vough, L. E., D. R. Buckmaster, and A. J. Heinrichs. 2006. Baleage systems: what’s working best today. NRAES-181. Silage for Dairy Farms. Harrisburg, PA. Pp. 161-172.
  • Wheeler, E. F., P. A. Topper, G. A. Varga,. N. Brown, V. Blanes-Vidal, A. J. Heinrichs, T. L. Richard, R. E. Graves, V. Ishler, G. I. Zanton, and M. L. Moody. 2006. Reducing ammonia emission from dairy housing using nutritional strategies. In Proc. Agric. Air Quality Workshop, Washington, D.C. 5 pp .
  • Wheeler, E. F., P. A. Topper, G. A. Varga, N. Brown, R. E. Graves, V. Ishler, A. J. Heinrichs, V. Blanes-Vidal, and T. L. Richard. 2006. Ammonia emission monitoring from dairy housing using flux chamber methods. In Proc. Agric. Eng. 2006 World Congr. Bonn, Germany 6 pp.
  • Zanton, G. I., and A. J. Heinrichs. 2006. A new paradigm for heifer nutrition: cut manure output 20 to 40 percent. Proc. of Penn State Dairy Cattle Nutrition Workshop. Pp. 73-77.
  • Heinrichs, A. J., P.J. Kononoff, and G. I. Zanton. 2005. Using particle size measurements for feeding management of corn silage based dairy rations. Proc. of the Mid-Atlantic Nutrition Conference. Pp. 147-151.
  • Kononoff, P. J., and A. J. Heinrichs. 2004. TMR particle size analysis and interpretation. Proc. Cornell Nutrition Conf. Pp. 167-177.
  • Kononoff, P. J., and A. J. Heinrichs. 2003. New developments in TMR Particle Size Measurements. Tri State Dairy Nutrition Conf. Pp.75-79.
  • Nennich, T., J. H. Harrison, D. Meyer, W. P. Weiss, A. J. Heinrichs, R. L. Kincaid, W. J. Powers, R. K. Koelsch, and P. E. Wright. 2003. Development of standard methods to estimate manure production and nutrient characteristics from dairy cattle. Ninth Intl. Anim. Food Processing Wastes Proc. Research Triangle Park, NC. Pp 263-268.
  • Heinrichs, A. J. 2002. Economic analysis of heifer raising programs. Proc. Engalec Natl. Dairy Congr. pp. 24-31.
  • Heinrichs, A. J. 2002. Mannan oligosaccharides in the diets of dairy calves and their effects on growth and health. Biotechnologia en la Industria de la Alimentacion Animal. Pp. 175-185.
  • Heinrichs, A. J. 2002. Protein and energy relationships in feed, efficiency of mammary gland development in prepubertal calves and first lactation and lifetime milk production. Proc. Engalec Natl. Dairy Congr. pp. 31-39.
  • Heinrichs, A. J. 2002. Uso do racions total mezclasa (TMR) para vacus lecheras. Proc. Costa Rican Nacional Dairy Congreso. pp. 45-52. 
  • Lammers, B. P., M. T. Gabler, and A. J. Heinrichs. 2002. Protein and energy needs of the heifer. Proc. NE Dairy Heifer Grower’s Assoc. pp. 21-28. 
  • Lammers, B. P., M. T. Gabler, and A. J. Heinrichs. 2002. Protein and energy needs of the heifer. Proc. Tri-State Dairy Nutr. Conf. pp. 71-79. 
  • Lammers, B., M. Gabler, and J. Heinrichs. 2001. Protein and energy needs of the heifer. Proc. NE Heifer Workshop pp. 21-28.