The storage grains loss can occur due to the following reasons:
(i) Biotic factors – like insects, rodents, fungi, mites and bacteria. These organisms infect the grains and degrade the quantity  and quality of the grains.
(ii) Abiotic factors- Various factors like inappropriate moisture, temperature can lead to loss of grains and their discolouratiion, loss in weight etc.   

Good animal husbandry practices produce drought animals that can be used for the agricultural purposes like tilling, irrigation and carting.  The draught animals perform these works and make the work easy for the farmer. 

Proper management technique is a common factor for increasing production in poultry, fisheries, and bee. Management techniques like regular cleaning of farms is of utmost importance. Maintenance of temperature and prevention and cure of diseases of the farmed organisms is also required to increase the number of animals and the yield.

Genetic manipulation is a process in which the gene for a desired character is introduced inside the cell of a plant. The incorporation of a new gene in to the new plant produces a transgenic plant which exhibits the desired characters.
Genetic manipulation is useful as it allows new varieties with desired characters to be produced. It allows in the production of plants with higher yield, good quality, biotic and abiotic resistance, short maturity period, wider adaptability and desirable agronomic characteristics.

Benefits of cattle farming:
(i) High yield - Good quality and quantity of milk can be produced.
(ii) Farm labour - Draught labour animals can be produced for agricultural work like tilling irrigation and carting.
(iii) New variety that are high yielding and resistant to diseases can be produced by crossing two varieties with the desired traits.