Explanation

(a) Explanation of land tenure system  It refers to the system of land ownership/ acquisition by individuals or groups for temporary or permanent use plant.

(b) Definition of weed  A weed is any plant found growing in a place where it is not wanted/desired. It is an unwanted plant.

(c) Discussion of groundnut rosette disease 

(i) Causal organism 

-Virus

(ii) Mode of transmission

  - By insect vector called aphid

(iii) Symptoms 

- Stunted growth

- Leaves turn yellow with mosaic of mottling

- Leaves become closely packed and curled

(iv) Control

  -Early planting

- Plant resistant verities

- Uproot and burn infected plants

- Use insecticide to kill aphids

- Practise close spacing

(d) Characteristics of factors of production 

(i) Land

  - Immobile/fixed in supply

- Subject to the law of diminishing returns

- Its reward is rent It is a fixed asset

- Its value is based on its location its unit is acres/hectares It is a free gift of nature

- It is heterogeneous in nature It appreciates/depreciates over time.

(ii) Capital 

- It takes different forms, e.g. machinery and agro-chemicals

- It can depreciate/appreciate over time - It could be fixed or working capital

- The reward of capital is interest - It is man-made and is accumulated over time.

- It can be used to acquire other factors, e.g. land and labour.

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