Why are manure and fertilizers used in fields? - Science

Question

Why are manure and fertilizers used in fields?

Answer

Manure and fertilizers are used in fields:

To enrich the soil with essential nutrients like nitrogen, phosphorus, and potassium.
To ensure healthy vegetative growth (leaves, branches, and flowers) of the plants.
To replenish the soil fertility and increase crop production.

What do we get from cereals, pulses, fruits and vegetables?

How do biotic and abiotic factors affect crop production?

What are the desirable agronomic characteristics for crop improvements?

What are macro-nutrients and why are they called macronutrients?

How do plants get nutrients?

Compare the use of manure and fertilizers in maintaining soil fertility.

Which of the following conditions will give the most benefits? Why?

(a) Farmers use high-quality seeds, do not adopt irrigation or use fertilizers.

(b) Farmers use ordinary seeds, adopt irrigation and use fertilizer.

Why should preventive measures and biological control methods be preferred for protecting crops?

What factors may be responsible for losses of grains during storage?

Which method is commonly used for improving cattle breeds and why?

Subject: Science
Class: class 9
Chapter 12: Improvement in Food Resources
Medium: English Medium