Revision Questions

1a. Explain with examples the two classifications of weeds based on their life style.

1b. Explain with examples the two classifications of weeds based on their physiology/shape of leaf.

2a. In a tabular form, write out five (5) common weeds in Nigeria and write the botanical name for each.

2b. Explain any three methods of weed dispersal.

3a. Define Soil.

3b. State four (4) factors affecting soil formation.

4a. List three (3) types of soil and state five (5) properties of each of the named soil types.

4b. Describe briefly how soil organisms help in the formation of soil.

5. Write a short note on the following: a) Soil texture

b) Soil Structure

c) Soil pH