National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Milk yield data of 4 Jersey cross cows were taken from Dairy Farm of Department of Silviculture and Agroforestry, Dr. Y S Parmar University of Horticulture and Forestry Nauni- Solan, Himachal Pradesh from 1978-2014. Data were used on stability analysis of milk yield of Jersey cross cows to find out stable lactation. Wricke proposed ‘Ecovalence’ based on means. Study on Wricke ecovalence indicates a generalized estimate of study of performance based on means under more than two months. Ecovalence is generally expressed in percentage. As percentage of ecovalence (Wi) is inversely associated with lactation stability, a low percentage of Wi indicates high stability of performance. Therefore, lactation 5 was found to be high stable lactation.
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