a. i. Explanation of selective exploitation as used in forest management.
ii. Advantages of selective exploitation of forest trees
b. Distinction between field pests and storage pests of crops
c. I.Examples of storage insect pests of crops
ii. Examples of field insect pests of crops
d. Ways of conserving water in the soil
Explanation
ai. - Selective exploitation is the process of cutting only matured trees in a forest
- It allows for the harvesting of order trees while the younger ones remain as cover on the surface of the forest until they mature
- it is also based on certain criteria such as girth and species of trees to be felled
- it is a legal felling of forest tree species
ii. - Ensures concentration of selected species of timber in a forest
- protects the soil from erosion
- Ensures continuous supply of timber
- prevents indiscriminate felling of timber
- Allows the young trees to mature
b. Field pest is any organism which significantly reduces the quantity and quality of farm produce while still on the field before harvesting.
While
Storage pest is any organism which significantly reduces the quantity and quality of farm produce when in storage after harvesting.
c. I.-Rice weevil - Maize weevil - Bean beetle
- Sorghum weevil - granary weevil - grain moth
- Kolanut weevil
d. - Strip cropping - Mulching -Terracing
- Addition of humus/organic manure
- Reduction of surface water run-off