CROP PRODUCTION

The process of separation of grain seeds from the chaff is

• harvesting

• weeding

• sowing

• threshing

The machine used for cutting and threshing of crops are called

• moat

• rahat

• combine

• plough

Which of the following produces manures?

• cattle dung

• human waste

• plant residue

• all of these

Weeds are defined as

• useful plants present in the field .

• undesirable pests present in the field

• undesirable plants present in the field.

• none of these

Rhizobium bacteria is present in the nodules of the roots of ____

• wheat

• leguminous plants

• maize

• onion

The chemical used as weedicide is

• a)2,4-Dichlorophenoxyacetic acid

• b)malathion

• c)boric acid

• d)both a and b

Before storing ,the grains are properly dried under sunlight.

• True

• False

Silos are used to

• grow crops in the field.

• protect grains from pests like rats and insects

• to store damaged grains.

Winnowing is a method of separating of

• soil from chaff.

• grain from chaff.

• soil from grain.

• to remove the crumbs.

The supply of water at different intervals is called

• watering

• irrigation

• harvesting

• crop rotation