Volume 53 (2022)
Volume 52 (2021)
Volume 51 (2020)
Volume 50 (2019)
Volume 49 (2018)
Volume 48 (2017)
Volume 47 (2016)
Volume 46 (2015)
Volume 45 (2014)
Volume 44 (2013)
Volume 43 (2012)
Volume 42 (2011)
Volume 41 (2010)
Volume 40 (2009)
Volume 39 (2009)
Evaluating Economic Losses Associated With Delayed Conception in Dairy Cows

Ali Rezaee Roodbari; Hamid Kohram; Essa Dirandeh

Volume 46, Issue 2 , August 2015, , Pages 151-158

http://dx.doi.org/10.22059/ijas.2015.55646

Abstract
  The objective of this study was to consider economic consequence of delayed conception of milking cows in large dairy farms in Iran. Optimum open days and milk production at peak were assumed to be 110 days and 45 kg respectively. Price of milk, feed, semen and hormones were calculated based on average ...  Read More

Genetic analysis of milk yield and open days traits of Holstein dairy cattle in Iran for first five lactation

Hossein Mehrban; Seyyed Mehdi Esmaeilifard; Mojtaba Najafi; Bita Abbasi mashaei; Ebrahim Asadi-Khashoei

Volume 45, Issue 1 , April 2014, , Pages 27-36

http://dx.doi.org/10.22059/ijas.2014.51746

Abstract
  A data file containing 607662 (317608) milk (open days) records belonging 294417 (177838) Holstein cows that were calved from 1983 to 2008 was used. The bivariate repeatability model was used for data analyzing so that herd, calving year, calving month, days in milk (only for milk trait) and calving ...  Read More