Controlled drainage


By using the methods proposed the farmers would achieve economic benefits through lowering the running costs of their farms. The method has positive effect on the soil (improves soil
fertility, reduces soil erosion and improves water retention), which is the main production resource of agriculture.
Controlled drainage provides nutrient retention, thus reducing the costs for fertilisers, as well as improves the quality of the water leaving the drainage system. Controlled drainage also
increases yield and N uptake by crops and left less N available for leaching after the harvest. If properly constructed, the controlled drainage system can also be used to irrigate the fields in drought years, which would improve both the yield size (8-10%) and quality.