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For Brahman or Santa Gertrudis crosses (tropical breeds), a medium to high roughage diet may be adequate. For animals raised on the range from weaning to 18 months, a daily live weight gain of 0.3 kg has been reported (Animal production and range research unit 1988) and this will probably decline as the animals mature.
On the average, a dairy cow produces 82 pounds of manure per day per 1000 pounds liveweight. Table 1 can be used to calculate the amount of manure produced from the cow and replacement herd.Thus a Holstein (1400 pounds) cow produces 115 pounds of manure per day or approximately 21 tons per year.Heifers will average approximately 7 tons per year. The nutrient content values listed in Table 1 are approximate and do not include bedding material or added water.able 1 can be used to calculate the amount of manure produced from the cow and replacement herd. Thus a Holstein (1400 pounds) cow produces 115 pounds of manure per day or approximately 21 tons per year.