References
- Balaine, D. S., R. E. Pearson and R. H. Miller. 1981. Profit functions in dairy cattle and effect of measures of efficiency and prices. J. Dairy Sci. 64:87-95. https://doi.org/10.3168/jds.S0022-0302(81)82532-5
- Beaudry, T. F., B. G. Cassell and H. D. Norman. 1988a. Relationships of lifetime profit to sire evaluations from first, all, and later records. J. Dairy Sci. 71:204-213. https://doi.org/10.3168/jds.S0022-0302(88)79543-0
- Beaudry, T. F., B. G. Cassell, H. D. Norman and R. E. Pearson. 1988b. Impact of prices on profit functions in dairy cattle. J. Dairy Sci. 71:485-491. https://doi.org/10.3168/jds.S0022-0302(88)79578-8
- Cassell, B. G., R. E. Pearson, J. Stole and S. Hiemstra. 1990. Relationship between sire evaluation for linear type traits and lifetime relative net income from grade or registered daughters. J. Dairy Sci. 73:198-204. https://doi.org/10.3168/jds.S0022-0302(90)78664-X
- Cassell, B. G. and D. J. Weigel. 1994. Use of lifetime net income in dairy genetics research. In: Proceedings of the 5th World Congress on Genetics Applied to Livestock Production, Guelph. 17:97-100.
- Cassell, B. G., S. M. Jobst, M. L. Mc Gilliard and R. E. Pearson. 2002. Evaluating sire selection practices using lifetime net income functions. J. Dairy Sci. 85:3492-3502 https://doi.org/10.3168/jds.S0022-0302(02)74438-X
- Cassell, B. G., S. M. Smith and R. E. Pearson. 1993. Influence of herd-life opportunity and characteristics of cows and herds on different net income functions. J. Dairy Sci. 76:1182-1190. https://doi.org/10.3168/jds.S0022-0302(93)77447-0
- de Hann, M. H. A., B. G. Cassell, R. E. Pearson and B. B. Smith. 1992. Relationship between net income, days of productive life, production, and linear type traits in grade and registered Holsteins. J. Dairy Sci. 75:3553-3561 https://doi.org/10.3168/jds.S0022-0302(92)78131-4
- Farahany Poor, M. 2004. Estimation of genetic parameters of relative net income corrected for opportunity cost in Iranian Holstein. MS Thesis. Guilan Univ., Rasht, Iran.
- Groen, A. F. 1989. Cattle breeding goals and production circumstances. Ph. D. Thesis. Wageningen Agricultural University. Wageningen, The Netherlands.
- Mehdizadeh, E. K. M. 2002. Relationship between lifetime relative net income and first lactation traits in three dairy farms in north of Iran. MS Thesis. Zanjan Univ., Zanjan, Iran.
- Nilfrooshan M. A. and M. E. Edriss. 2004 Effect of age at first calving on some productive and longevity traits in Iranian Holsteins of the Isfahan Province. J. Dairy Sci. 87:2130-2135. https://doi.org/10.3168/jds.S0022-0302(04)70032-6
- Norman, H. D., B. G. Cassell, R. E. Pearson and G. R. Wiggans. 1981. Relation of first lactation production and conformation to lifetime performance and profitability in Jerseys. J. Dairy Sci. 64:104-113. https://doi.org/10.3168/jds.S0022-0302(81)82534-9
- Park, B. and D. Lee. 2006. Prediction of future milk yield with random regression model using test-day records in Holstein cows. Asian-Aust. J. Anim. Sci. 19:915-921 https://doi.org/10.5713/ajas.2006.915
- SAS system for windows. 2002. Release 8.02. SAS Institute Inc. NC. USA.
- Shadparvar, A. A. 1999. Relationship between relative net income and age at first freshening and milk production of first lactation of dairy cows. J. Agric. Sci. Technol. 13:119-130.
- Stokes, J. R., P. R. Tozer and J. Hyde. 2007. Identifying efficient dairy producers using data envelopment analysis. J. Dairy Sci. 90:2555-2562. https://doi.org/10.3168/jds.2006-596
- Tigges, R. J., R. E. Pearson and W. E. Vinson. 1984. Use of dairy herd improvement variables to predict lifetime profitability. J. Dairy Sci. 67:180-184. https://doi.org/10.3168/jds.S0022-0302(84)81282-5
- Tigges, R. J., R. E. Pearson and W. E. Vinson. 1986. Prediction of lifetime relative net income from first lactation production and individual type traits in Hlostein cows. J. Dairy Sci. 69:204-210. https://doi.org/10.3168/jds.S0022-0302(86)80387-3
- Van Arendonk, J. A. M. 1991. Use of profit equations to determine relative economic value of dairy cattle herd life and production from field data. J. Dairy Sci. 74:1101-1107. https://doi.org/10.3168/jds.S0022-0302(91)78261-1
- Weigel, D. J., B. G. Cassell and R. E. Pearson. 1995. Adjustment of a net income function for opportunity cost of postponed replacement on a lactation basis. J. Dairy Sci. 78:648-654. https://doi.org/10.3168/jds.S0022-0302(95)76676-0