(a) Explain each of the following terms; (i) farmstead (ii) secondary tillage. [4 marks] 

(b) State one function of each of the following parts of a mouldboard plough: (i) hitch; (ii) furrow wheel; (iii} disc coulter; (iv) plough share; (v) mouldboard. [5 marks] 

(c) Describe one natural process that takes carbon away from the atmosphere. [2 marks] 

(d) Outline three ways of replenishing plant nutrients in the soil. [3 marks]

(e) State two deficiency symptoms of calcium in crops. [2 marks] 

(f) List four soil organisms. [2 marks]