Question

Why fertilizers and manures are needed to the fiels from time to time science?

Answer 1

there needed to increase the nutrition level of fields because when we grow crops on the field there nutrition level decreases and if without using fertilizer or manure if you're sowing next crop then then you're yield will be less

Answer 2

manure is rich in organic matter and nutrients to enrich the field. in sandy soil water holding capacity is high because of the manure.manure helps to improve the structure of the soil.so it is necessary for the field to increase the production and to increase the soil fertility
fertilizer are commercial used for plant nutrient.it supply nitrogen , potassium, phosphorus.they are used to grow good vegetables, so both manure and fertilizer are needed to the fied from time to time in science