TEST OF PRACTICAL KNOWLEDGE QUESTION Take a sample each of specimens F (CLAY SOIL), G (LOAMY SOIL) and H (SANDY SOIL) and rub each between the thumb and for...

Answer Details

a) Observation table:

b) Two crops that can be grown on specimen H (sandy soil) are watermelons and peanuts.

c) (i) Specimen F (clay soil) is preferred for maize production.

(ii) Three reasons for the preference of clay soil for maize production are:

1. Clay soil has high water retention capacity, which ensures consistent moisture for the maize plant.
2. Clay soil has high nutrient retention capacity, which means that the maize plant can access nutrients for a longer time, leading to better growth and yield.
3. Clay soil has good soil structure, which allows for good aeration and root penetration, essential for good maize plant growth.

d) Three ways in which earthworms are of economic importance in agriculture are:

1. Soil fertility: Earthworms burrow through soil, aerating it and mixing organic matter with soil particles. This process enhances soil fertility, which leads to better crop growth and yield.
2. Vermicomposting: Earthworms feed on organic waste material and excrete nutrient-rich castings, which can be used as organic fertilizer. This process of vermicomposting reduces waste, produces fertilizer, and saves money that would have been used to purchase chemical fertilizers.
3. Soil structure: Earthworms burrow through soil, creating channels for water and air to flow through. This process enhances soil structure, which allows for better root penetration and nutrient absorption by crops. Good soil structure also reduces soil erosion and improves water infiltration.