(a) State three methods of irrigating a small nursery. (b) Enumerate three factors to be considered in the choice of each of: (i) surface irrigation method ...

(a) State three methods of irrigating a small nursery. (b) Enumerate three factors to be considered in the choice of each of: (i) surface irrigation method (ii) sub-surface irrigation method. (c) .State two advantages of subsurface irrigation (d) Enumerate five ways by which the build-up of diseases could be reduced on an irrigated farm.