(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.

(a) A farmer intends to cultivate sorghum on a farmland measuring 300m by 1050m at a seed rate of 60kg per hectare.

 If sorghum requires NPK 15:15:15 fertilizer at the rate of 20kg per hectare.

 Calculate the:

 (i) area of farmland in hectares

 (ii) quantity of sorghum seeds required for planting

 (iii) quantity of fertilizer required 

b(i) State two differences between building and grafting in vegetative propagation.

  (ii) Mention four crops that could be propagated by budding.

  (c) Name two groups of farm animals each that should be fed with:

  (i)  production ration

  (ii) maintenance ration

(a) Give two reasons each for carrying out the following practice in fish ponds:

(i)  Removal of excessive vegetation

(ii) Removal of salt

(iii) Supplematary feeding

(iv) Fertilizer application

(b) Mention five conditions that could necessitate culling of animals

(c) State five effects of excess nitrogen in soil on crops.

(a) What is agricultural insurance?

 (b) Define each of the following terms in agricultural insurance

 (i)  insurance policy 

 (ii) Insurance premium

 (c)  An agricultural extension agent organized a meeting with the groundnut farmers in a village to introduce a disease resistant variety of groundnut to them.

 (i)  State four advantages of the agricultural extension method employed by the extension agent..

 (ii)  Mention three other ways by which the information should be disseminated to the group of farmers.

 (d) Enumerate five operations involved in the processing of rice after harvesting.