海量图书期刊资源,随时随地畅享阅读乐趣
Five Methods for Determination of Silage Dry MatterBrahmakshatriya, R.D.; Donker, J.D. · 1971
Methionine Hydroxy Analog in Diets for Lactating CowsBhargava, P.K.; Otterby, D.E.; Murphy, J.M.; Donker, J.D. · 1977
Selective Grazing Induced by Animal Excreta. II. Investigation of a Causal TheoryMarten, G.C.; Donker, J.D. · 1964
Effect of Condition of Animal on the Creatinine Excretion of Bovine AnimalsRebhan, H.J.; Donker, J.D. · 1960
Selective Grazing Induced by Animal Excreta I. Evidence of Occurrence and Superficial RemedyMarten, G.C.; Donker, J.D. · 1964
Effect of Condition of Animal on the Requirements of Energy for Maintenance of the BovineRebhan, H.J.; Donker, J.D. · 1960
Lactation Studies. III. Milk and Milk Fat Yields Comparing Three Twice-daily Milking SchedulesLinnerud, A.C.; Williams, J.B.; Donker, J.D. · 1964