Production and Management
Q68. Why is it necessary to dry the harvested food grains before
Ans. The fresh crop has more moisture. If freshly
harvested grains (seeds) are stored without drying, they may get spoilt or
attacked by organisms, losing their germination capacity. Hence, before storing
them, the grains are properly dried in the sun to reduce the moisture in them.
This prevents the attack by insect pests, bacteria and fungi.
Q69. Why drilling is the best method for sowing of seeds?
Explain the method used these days to sow seeds.
Ans. Nowadays the seed drill is used for sowing with
the help of tractors. Seed drill sows the seeds uniformly at proper distances
and depths. It ensures that seeds get covered by the soil after sowing. This
prevents damage caused by birds. Sowing by using a seed drill saves time and
labour. Hence, it is considered as the best method for sowing of seeds.
Q70. What are the advantages of sprinkler system of irrigation?
Advantages of sprinkler system of irrigation
This system is more useful on the uneven
land where sufficient water is not available.
Water gets sprinkled on the crop as if it
Sprinkler is very useful for sandy soil.
Water is also distributed more evenly
across crops helping to avoid wastage.
Q71. What are the steps involved in agricultural practices?
Ans. Steps involved in agricultural practices are:
Preparation of soil
Adding manure and fertilisers
Protecting from weeds
Q72. Why organic manure is considered better than fertilisers?
What are the advantages of organic manure?
Ans. The organic manure is considered better than fertilisers.
This is because
It enhances the water holding capacity of
It makes the soil porous due to which
exchange of gases becomes easy.
It increases the number of friendly
It improves the texture of the soil.
Q73. If wheat is sown in the kharif season, what would happen?
Wheat is a rabi crop and grown in winter season. Their time period is generally
from October to March. It needs cool, dry and clear climate for better growth
and yield. Kharif season is generally from June to September. Kharif crops requires
huge amount of water and hot weather to grow. If wheat is grown in Kharif
season it will be affected adversely as hot and humid climate is not ideal for
cultivation of wheat.
Q74. Name the three tools used for ploughing. Write function of
Ans. Tools used for ploughing are:
This is being used since ancient times for tilling the soil, adding fertilisers
to the crop, removing the weeds, scraping of soil, etc.
It is a simple tool which is used for removing weeds and for loosening the
Nowadays ploughing is done by tractor driven cultivator. The use of cultivator
saves labour and time.
Q75. Explain how fertilisers are different from manure.
Difference between fertilisers and manure
1. A fertiliser is an inorganic salt.
1. Manure is a natural substance obtained
by the decomposition of cattle dung, human waste and plant residues.
2. A fertiliser is prepared in factories.
2. Manure can be prepared in the fields.
3. A fertiliser does not provide any
humus to the soil.
3. Manure provides a lot of humus to the
4. Fertilisers are very rich in plant
nutrients like nitrogen, phosphorus and potassium.
4. Manure is relatively less rich in