Improvement in food resources
1)
The bulk organic matter present in manure improves soil
structure.
2)
In composting, the biological waste material is
decomposed in pits. Composting done using earthworms is called
vermi-composting.
3)
In green manuring, green crops are grown, mulched by
ploughing and mixed with soil to improve soil structure and fertility.
4)
The commercially produced fertilizers provide
macronutrients like N, K and P and ensure healthy growth of plants.
5)
Excessive use of fertilizers causes water pollution and
loss of soil fertility.
6)
Best crop yields is obtained by a balance between the
use of fertilizers and manures.
7)
In organic farming, use of chemicals is discouraged
whereas use of organic manures, bio-agents and healthy cropping systems is
encouraged.
8)
Irrigation is essential to ensure agricultural success
in India since our agriculture is mainly rain-fed.
9)
Wells, canals, rivers and tanks are some important
irrigation systems in our country.
10)
The source of wells is underground water whereas canals
get water from rivers or reservoirs. River lift systems draw water directly
from rivers.
11)
Rainwater harvesting and watershed management increases
storage of rain water for later use in agriculture.
12)
Risk of crop failure is reduced in mixed cropping
wherein two or more crops are grown together on the same field.
13)
Two or more crops with different nutritional
requirements are grown on the same farm in inter-cropping so as to utilize
maximum nutrients and prevent spread of diseases and pests.
14)
In crop rotation, different crop combinations are grown
on the same field in a pre-planned succession so as to get maximum returns.
15)
Weeds, pests and diseases can destroy large amounts of
crop plants.
