Cow B is pregnant. A or B. F. Effect of environment on milk yield 1. Feed consumption ceases at temperatures above 105 o F. 3. Use of shade, fans, showers or air conditioning reduces environmental stress. Yields decrease progressively for cows calving in the winter, spring and summer, respectively.
Moderate exercise is conducive to high milk production.
Too much or too little exercise is detrimental to milk production. When the environmental is 75 o F or above, reduced feed intake is followed by a decrease in milk production. At approximately 5 o F, feed consumption increases and milk production decreases. Effect of environmental temperature on milk yield, TDN consumption, respiration rate, and body temperature of Holstein and Jersey cows.