Question

A manure containing a mixture of crop debris and cow dung is called
(A) green manure
(B) farmyard manure
(C) composted manure
(D) biofertilizer

Answer 1

Hint: A manure is obtained from the organic sources such as animal wastes, composts and others, and is utilized as a fertilizer (organic) in agricultural productions. The farmyard manure is usually made up of a mixture of animal wastes such as cow dunk or urine and cow debris.

Complete answer:
 The type of fertilizer which is mostly composed of farmyard animal faeces is called farmyard manure. This manure is highly utilized in the agricultural product yields. The farmyard manure is mostly composed of the cow dunk or debris and is highly utilized by the farmers for the production of fertilized lands having low fertility. The waste products of the animals mostly comprises nutrients they use to get from various natural sources comprising one of the most important elements, nitrogen which is one of the most essential element for the plants. The manure prepared from the plant wastes is called green manure. Also, the green manure is produced from the crop wastes or residues. This improves the quality of the soil and ultimately helps in better agriculture yields. The manure produced from the collection of various organic matter, also known as compost products, are called composted manure.
The substances composed of living microorganisms are called bio-fertilizers or biofertilizers. These biofertilizers when added to the surface of the plants or seeds, enhances growth of the agriculture yield because they significantly increase the availability of the prime nutrients for the plants.

Hence the correct answer is option(B)

Note: For better and high agricultural yield, the organic manures and composited manures could be used together in significant ratios.