Question 1Compare the use of manure and fertilizers in maintaining soil fertility.

Question

Accepted Answer

ManureFertilizersConsists of large quantity of organic matter.Consists of compounds containing nutrient and no organic matter.Supplies small quantities of nutrients to the soil.Supplies large quantity of nutrient to the soil.Prepared by the decomposition of animal excreta and plant waste; some times green plants.Commercially produced plant nutrients.The bulk of organic matter in manure helps in improving the soil structure, water holding capacity and fertility.It can hamper soil structure and fertility if not used in optimum amount.They do not affect pH of soil.They can make the soil acidic or alkaline.They do not cause pollution.They cause air pollution during their manufacture and water pollution when used excessively in fields.Examples: Compost, Green manureExample: Urea, SSP

Manure	Fertilizers
Consists of large quantity of organic matter.	Consists of compounds containing nutrient and no organic matter.
Supplies small quantities of nutrients to the soil.	Supplies large quantity of nutrient to the soil.
Prepared by the decomposition of animal excreta and plant waste; some times green plants.	Commercially produced plant nutrients.
The bulk of organic matter in manure helps in improving the soil structure, water holding capacity and fertility.	It can hamper soil structure and fertility if not used in optimum amount.
They do not affect pH of soil.	They can make the soil acidic or alkaline.
They do not cause pollution.	They cause air pollution during their manufacture and water pollution when used excessively in fields.
Examples: Compost, Green manure	Example: Urea, SSP

Improvement in Food Resources — Question 1

Question 1