Question

*Subject - Science*
*Revision test*
*Chapter - 1, Crop production and mangement*
And
*Chapter - 2, Microorganisms*

Que.1 Give one example of fertilizers.
Que.2 Give one example of organic manure.
Que.3 The same kind of plants grown and cultivated on a large scale at a place is called-
Que.4 Give two example of kharif crop.
Que.5 Give two example of rabi crop.
Que.6 Define weeding
Que.7 What is irrigation?
Que.8 Write short note about preparation of soil.
Que.9 Write short note about Threshing.
Que.10 What is irrigation? Describe two method of irrigation which conserve water.
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Answer 1

Answer:

1) Examples of naturally occurring organic fertilizers include manure, slurry, worm castings, peat, seaweed and guano.

2)Dunk.

3)The same kind of plants grown and cultivated on a large scale at a place is called crop.

4)Rice and Maize.

5)Wheat and Pulses.

6)The unwanted plants that grow in-between crops are called weeds. The process of removal of such unwanted plants is called weeding.

7)Irrigation is the artificial process of applying controlled amounts of water to land to assist in production of crops.

8)Preparation of soil is the first step before growing of crop. It helps to turn the soil and loosen it to allow the roots to penetrate deep into it. The loosening of the soil helps in the growth of several soil microbes, earthworms etc., which enrich the soil with humus and other essential nutrients.

9)Threshing is the process of loosening the edible part of grain (or other crop) from the straw to which it is attached. It is the step in grain preparation after reaping. Threshing does not remove the bran from the grain.

10) Irrigation is the artificial process of applying controlled amounts of water to land to assist in production of crops.Two methods of irrigation are: (i) Sprinkler system : This system is used on the uneven land where less water is available. ... (ii) Drip irrigation: This system is used to save water as it allows the water to flow drop by drop at the roots of the plants.

Explanation:

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Answer 2

Answer:

1. worm Castings

2. Oil cakes fish manure

3. Crop

4. rice, maize

5. Wheat, Gram

6. To remove weeds from a piece of grounds is known as weddings

7. It is an artificial process of applying controlled amounts of water to land to assist in production of crops is known as irrigation.

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