a. Differentiate between the following: i. Intensive farming and extensive farming (4 marks) ii. Primary cultivation and secondary cultivation (4 marks) iii. Hybrid vigour and inbreeding depression. (4 marks) b. Explain the importance of seedbed preparation in establishment of annual crops c. Explain the importance of common beans in the diets of rural poor households (4marks) d. State three reasons why sorghum is now considered to be 'green gold' in Kenya (4marks) e. State four reasons why late planting leads to low yields in annual crop production (3 marks) f. Explain the relationship between anthesis in cereals and water supply (4 marks)

a. Differentiate between the following:<br />i. Intensive farming and extensive farming<br />(4 marks)<br />ii cultivation and secondary cultivation<br />(4 marks)<br />iii. Hybrid vigour and inbreeding depression.<br />(4 marks)<br /><br />b. Explain the importance of seedbed preparation in establishment of annual crops<br /><br />c. Explain the importance of common beans in the diets of rural poor households<br /><br />(4 marks)<br /><br />d. State three reasons why sorghum is now considered to be 'green gold' in Kenya<br /><br />(4 marks)<br /><br />e. State four reasons why late planting leads to low yields in annual crop production<br /><br />(3 marks)<br /><br />f. Explain the relationship between anthesis in cereals and water supply<br /><br />(4 marks)