Marginal cost could be described as as the 

Farm gate price is mostly enjoyed by 

(a) Mention 3 ways each by which the following agricultural programmes and institute have contributed to agricultural development in West Africa:

  i   cooperative farming

  ii  farm settlement scheme

  iii  agricultural research institute

 (b) Name one tractor-mounted implement each that would perform a similar function as as the following farm tools.

      (i) Dibber: (ii) Hoe  (iii) Sickle  (iv) Wheelbarrow (v) Watering can: 

 (c) State two:

       (i) advantages of using the mouldboard plough;

       (ii) disadvantages of using the mouldboard plough.

  (a) With the aid of a pH scale,explain the term soil pH.

 b(i) What are cover crops?

   (ii) Mention five advantages of planting cover crops on farm.

   (c) Complete the table below.

(a) Give one function of each of the following bacteria in Nitrogen cycle:

      ii Rhizobium

      ii Nitrosomonas

      iii Pseudomonas

      iv Nitrobacter

 (b)  A farmer discovered that aphids have invaded a cowpea farm.

  (ii)  State three effects of aphids on the cowpea plants.

 c(i)  Explain the term forestry.

  (ii)  Name five products that could be obtained from forests.