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Describe two methods each for (i)improving crop yield (ii)Preserving and storing food.Explain the Principle involved in each of the methods described

Describe two methods each for
(i)improving crop yield
(ii)Preserving and storing food.Explain the
Principle involved in each of the methods described

Answers

Belinda
(i) Two methods of improving crop yield are:

(1) By the application of inorganic manure or fertilizer - Fertilizer ought to be applied before or after planting to boost the fertility of the soil which would in turn lead to an increase in the crop yield. There are different methods of fertilizer application. Fertilizer can be applied through the method of broadcasting, ring method or through the use of the side placement or filial method. Example of fertilizer is NPK- which contains Nitrogen Phosphorus and potassium. You need to make sure that fertilizer does not come into direct contact with growing crops because it would lead to the death of those crops.

(2) Crop rotation — Crop rotation is another method of improving the fertility of the soil and the yield of the crop planted on it. It is a system of cropping whereby crops are planted on the same piece of land with each crop following the other in a definite sequence during the same planting season. The piece of land may be shared into five plots and different types of crops planted on each of these plots every year in a specific order. To be able to do this effectively, you must make sure that crops that belong to the same family are not permitted to tag along each other in the sequence. Deep rooted crops ought to follow shallow rooted crops and leguminous crops ought to be sowed on the fallow plot in the sequence.

(ii) Methods of food preservation and storage:

(1) Canning — Canning is a method of food storage whereby foods are stored in cans or sealed containers. Before storage, heat treatment is applied to make sure that the food will not be acted upon by microbes and spoil.

(2) Refrigeration — Refrigerator is a good method of food storage because low temperature prevents the growth and spread of micro organisms. Other methods of food storage are:

(3) Drying and salting (4) Pasteurization, (5) Additives, (6) Smoking and (7) Irradiation.
adhixbelly answered the question on April 13, 2018 at 20:35

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