Tick (√) the correct option:

1. Cultivation of crops involves several activities, these activities are referred as
   1. Grounding
   2. Tilling
   3. Grinding
   4. Agricultural practices
2. The substances which are added to the soil in the form of nutrients for the healthy growth of plants are called manure and ___________.
   1. Sugar
   2. Carbohydrates
   3. Fertilisers
   4. Weeds
3. Which of these is not a cereal?
   1. Wheat
   2. Maize
   3. Rice
   4. Gram
4. The increase in temperature on the earth disturbs the water cycle and may reduce rainfall. This could cause ___________.
   1. Soil fertility
   2. Droughts
   3. Deforestation
   4. None of the above
5. Paddy, Maize, Soybean, Groundnut, Cotton, etc. are ___________.
   1. Kharif crops
   2. Rabi crops
   3. Out crops
   4. Share crops
6. The process of cutting and gathering fully grown crops is called
   1. Gathered
   2. Storage
   3. Collection
   4. Harvesting
7. Wheat, barley, potato are
   1. Rabi crops
   2. Kharif crops
   3. Seasonal crops
   4. None of the above
8. Conversion of ammonia to nitrates
   1. Nitrification
   2. Ammonification
   3. Nitrogen fixation
   4. Symbiosis

Fill in the blanks:

1. There should be proper drainage system in fields, to avoid ___________.
2. If the seeds are sown too deep, ___________ will be affected.
3. ___________ is a natural process of soil enrichment.
4. ___________ is the nitrogen fixing bacteria.
5. The cyclic movement of elements in nature between the environment and living organisms is called ___________.

Tick (√) the correct and cross (x) the wrong statement:

1. The atmosphere is the richest source of nitrogen.
2. Mustard, sunflower and groundnuts are all pulses.
3. Food grains are stored in godowns in plastic containers.
4. The plants grown in a field for food and fibre are called crop plants.
5. In India, special festivals are held commemorating the harvest.
6. The soil should consist of sand, clay, gravel, air, water and humus.

Find the odd one out:

1. Rice, wheat, brinjal, maize, barley.
2. Chenopodium, Amaranthus, spinach, Convovulus, wild oat, grass.
3. Khurpa, trowel, tractor, harrow.
4. Pesticides, redenticides, fungicides, manure, weedicides.
5. DDT, BHC, malathion, 2, 4-D Ethyl Ester, Gammaxene.

Match the following: