Benefits of drainage
i) Drainage facilitates early ploughing and planting
.ii) It lengthens the crop-growing season.
iii) It helps to increase root zone depth.
iv) It helps to decrease soil erosion.
v) It leaches excess salt from soil and prevents their accumulation in soils.
vi) It improves soil structure and the infiltration capacity of soil.
vii) It hastens the warming of soil and maintains desirable soil temperature.
viii) It helps to aerate the soil.
ix) It helps to favour growth of soil bacteria.
x) It helps in reclamation of arable soil, low lying or swamp areas.