Alternate wetting and Drying (AWD)
· Apply irrigation water to the field only after the disappearance of ponded water.Hence, the field is alternately flooded and non-flooded.
·
Decision for re-
irrigation scheduling is based on
(a) Visual methods:-
(i) Fine hair cracks on soil:- Irrigate
after appearance of fine hair cracks on soil surface
(ii) Leaf rolling:- Irrigate when the leaf starts
rolling
(b) Water level in Field water tube/Pani pipe :-
When
water level drops below 15 cm from soil surface, the field should be
re-irrigated