Question

1) Write 4 advantages of preparation of soil for growing crops.

2) Write 4 differences between manure and fertilizers

3) Explain 2 modern methods of irrigation which conserve water.

4) What is animal husbandry. Give its advantage

5) What are weeds?
How can we remove them. Give it's disadvantages



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Answer 1

Answer:

• 1:IT HELPS THE ROOT PENETRATE EASILY INTO THE SOIL.
• IT HELPS THE ROOT HAIRS TO BREATHE EASILY.
• IT MIXES THE TOP SOIL & DOWN SOIL EVENLY.
• THE WATER CAN GET INTO THE SOIL EASILY.
• IT EXPOSES THE HARMFUL MICRO-ORGANISMS TO THE SUN.
• IT EXPOSE THE PREY TO THE PREDATORS.
• IT HELPS IN UPROOTING THE UNWANTED WEEDS.

Answer 2

Answer:

In chemistry, the valence or valency of an element is the measure of its combining capacity with other atoms when it forms chemical compounds or molecules.