(a) Draw an annotated diagram of a water cycle. (b) State six importance of water to crops. (c) State four ways of conserving water in the soil.

 (a) List four ways by which diseases are spread on a crop farm. (b) State three symptoms and three control measures of each of the following diseases: (i) onion twister (ii) root-knot of tomato

(a) Define an insecticide (b) List four groups of insecticides. (c) For each of the following pests, name the class of pesticide used for their control: (i) grasshoppers (ii) rats (iii) weaver birds (iv) eelworms (d) Enumerate two effects of each of the following pest control measures on the environment: (i) chemical (ii) cultural (iii) biological 

(a) Explain the term candling in chicks production. (b) Write notes on the intensive method of managing poultry under the following headings: (i) sanitation (ii) feeding (c) List six breeds of pigs.

 (a) With the aid of an annotated diagram, describe the life cycle of the liver-fluke (Fasciola hepatica). Explain how you will prevent the liver-fluke from completing its life cycle in the field. (c) List three effects of lice on animal production.