Question

Most commonly used green manure plants are
A Berseem cotton and sun hemp
B Lentil sun hemp and berseem
C Sunflower. cotton and sugarcane
D Cowpea. cluster bean and teak leaves

Answer 1

Green manure is formed in agriculture by allowing uprooted or sowed crop pieces to wither on a field and serve as a mulch and soil amendment. Green manure plants frequently cover crops produced specifically for this purpose.

Complete answer:
They're usually ploughed beneath and integrated into the soil while they're still green or shortly after flowering. Green manure is typically connected with organic farming and can play an essential part in yearly cropping systems that are both sustainable and profitable.
Green manures have a variety of roles, including soil enhancement and protection:
Nitrogen-fixing symbiotic bacteria in root nodules of legume green manures like clover and vetch fix atmospheric nitrogen in a form that plants can utilise. The crucial function of fertilisation is carried out by this. Animal manures can also be added if desired.
The amount of nitrogen released into the soil varies depending on the type of cover crop used. It ranges from 40 to 200 pounds per acre. The quantity of nitrogen available to the subsequent crop when using green manure is typically in the range of 40-60% of the total nitrogen contained within the green manure crop.
Green manure refers to certain plant or crop varieties that are grown and then incorporated into the soil to improve its overall quality. Before tilling garden areas, a green manure crop might be chopped and subsequently ploughed into the soil, or just left on the ground for an extended length of time.
Grass mixtures and legume plants are examples of green manure crops. Lentil, vetch, sunn hemp, berseem, clover, peas, winter wheat, alfalfa, and other crops are among the most widely used.

As a result, option B is the proper response.

Note: Heterotrophic bacteria that devour organic materials break down green manure into plant nutritional components. This process, like making compost fertiliser, is aided by warmth and wetness. Large volumes of carbon dioxide and weak acids are released by plant matter, which react with insoluble soil minerals to produce useful nutrients.