The productivity of dairy animals in developing countries is greatly constrained by the lack of green fodder and good quality feed, due mainly to low availability and high cost. Crop residues and dry grasses are the major source of forages for feeding livestock in these countries.
These crop residues are low in nitrogen and high in fibre and lignin; characteristics that restrict intake and digestibility in animals. Animal nutritionists, all over the world, have proved that the nutritive value of these crop residues can be enhanced if supplemented with deficient nutrients .
The use of UMMB for supplementing crop-residue-based diets for livestock has the potential to increase livestock production and net daily income. UMMBs can be fed throughout the year but are more-beneficially utilised during the dry season or when the animals are grazing low-quality fodder.