(a)(i) Explain the law of diminishing returns. (ii) State how the law of diminishing returns affect agricultural production.

(b) Discuss how each of the following factors affect the supply of agricultural produce: (i) price (ii) technology (iii) weather (iv) subsidy (v) government policy.

 (a) List the three main extension teaching methods. (b) For each method listed in 10(a), state three types. (c) Give four qualities of a good extension agent.

(a)(i) Define agriculture [2 marks] (ii) List six branches of agriculture [3 marks]

(b) State five differences between commercial agriculture and subsistence agriculture [5 marks]

(c) State three merits and three demerits of using animal power on the farm. [6 marks]

 (a)(i) Explain the term farm surveying. [2 marks] (ii) State four reasons why farm surveying is important [4 marks]

(b) Enumerate six problems facing agricultural development in West Africa.

(c) List four factors that may affect the efficiency of draught animals. [4 marks] 

(a) Define the term soil. [2 marks]

(b)(i) List the four components of soil. [2 marks] (ii) State the percentage of each component by volume. [2 marks]

(c) Describe the process involved in making compost using the pit method under the following headings: (i) materials; [2 marks](i ) preparation; [6 marks] (iii) storage [2 marks]