(a) What is lactation period? Name two breeds of cattle which are selected for their long lactation period. Why are they crossed with local breeds?
(b) What are roughage and concentrates?
(a) The period of milk production after the birth of a calf is called lactation period.
Jersey and Brown Swiss are selected for their long lactation period.
Local breeds show excellent resistance to diseases. The two can be cross breed to get animals with both the desired qualities.
(b) Roughage is largely fibrous food.
Concentrates are low in fiber and contain relatively high levels of proteins.
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