(a) Explain briefly how the following affect agricultural production:(I) agricultural education and extension (ii) environmental degradation. [8 marks] 

(b) Enumerate three problems associated with communal land tenur system. [3 marks] 

(c) List four components of an incubator. [2 marks]

(d) Mention one storage structure for each of the following farm produce: (i) yam tubers (ii) cowpea seeds (iii) fresh fish. [3 marks]