Crop residues are valuable resources since they form a bulk of ruminant feed in many tropical countries. Due to lack of effective management of these resources, unfortunately they are being burnt in some countries, causing environmental pollution. The present paper discusses a technology based on the formation of a complete diet in the form of densified feed blocks or pellets from straws mixed with minerals, oil seed cakes and other agroindustrial by-products. The methods for preparation of such total mixed rations, their use and impact have been presented. It is hoped that this technology will enhance income of farmers, decrease environmental pollution and help alleviate shortage of good quality feeds in tropical countries.