a) Explain the following terms as used in crop production:

(i) seed rate;

(ii) plant density.

b) List five factors that determine the spacing of crops in the field.

*(c)* If the number of yam setts required to plant 0.04 hectare is 215 and the weight of each yam sett is 0.80 kg. What is the seed rate per hectare in tonnes?

*(d)* Name *one* pest and one disease of yam.

a)* List *three* advantages each of asexual and sexual methods of propagation.

*(b)* Describe the steps involved in budding a citrus plant.

a)* Explain the term malnutrition.

*(b)* State *three* symptoms of malnutrition in farm animals.

*(c)* List *five* factors to consider in formulating rations for farm animals.

*(d)* State *two* functions of each of the following nutrients in farm animals:

(i) proteins;

(ii) vitamins;

(iii) minerals.

a)* Define the term disease in livestock production.

*(b)* State the causal organism, prevention and *two* control measures of each of the following livestock diseases:

(i) Newcastle disease;

(ii) Anthrax;

(iii) Rinderpest.

*(c)* Name three predisposing factors of livestock diseases