How can poultry farming be integrated with crop production? How are improved poultry breeds developed in poultry farming?

(N/A) $(i)$ Poultry birds can be fed with farm wastes such as degraded grains and plant parts.
$(ii)$ Poultry excreta,rich in organic matter,can be used as manure for crops after decomposition.
$(iii)$ Improved poultry breeds are developed by cross-breeding between Indian (e.g.,Aseel) and foreign (e.g.,Leghorn) breeds to incorporate desirable traits like high egg production,dwarf broiler parent for commercial chick production,and better adaptability.