Every compost mix has four jobs. Straw supplies carbon, the energy food of microbes, and the open structure that lets air move. Chicken manure, wheat bran, oil cakes and fertilisers such as urea or calcium ammonium nitrate supply nitrogen, the protein food. Gypsum is the conditioner: it keeps the mass open and adds calcium. Water carries everything.
If you buy a material without knowing its job, you cannot repair the mix when one job falls short. Wheat straw, paddy straw and farmyard manure are what most Indian yards actually have, so plan around them.

