Question

how can we prepare manures

Answer 1

we can prepare manure as waste material of vegetable and fruits into soil or cow dung

Answer 2

It contains about 3 percent nitrogen, 2 percent phosphorus, and 1 percent potassium (3-2-1 NPK). In addition, cow manure contains high levels of ammonia and potentially dangerous pathogens. For this reason, it's usually recommended that it be aged or composted prior to its use as cow manurefertilizer.