Rice based crop sequences/cropping system:
P1= T. Aman–Boro–Fallow,
P2 = T. Aman–Mustard–Boro,
P3 = T. Aman–Potato– Rice and
P4 = T. Aman-Potato-Maize
Treatments:
T. Aman season
T1 = Irrigation (5-7 cm) when water is 15 cm below the soil surface
T2 = Irrigation (5-7 cm) when water is 20 cm below soil surface
T3 = Irrigation (5-7 cm) after 3 days of disappearing standing water (control)
Boro season
T1 = Irrigation (5-7 cm) when water is 15 cm below soil surface
T2 = Irrigation (5-7 cm) when water is 20 cm below soil surface
T3 = Irrigation after 3 days of disappearing standing water (control)
Rabi
Mustard
T1 = Rainfed
T2 = One irrigation (25-30 DAS)
T3 = Two irrigation (25-30 DAS+50–55 DAS)
Potato
T1 = Two irrigation (20-25 DAS+40–45 DAS)
T2 = Three irrigation (20-25 DAS+40–45 DAS+60–65 DAS)
T3 = Four irrigation (20-25 DAS+40–45 DAS+60–65 DAS + 75-80 DAS)
Maize
T1 = Two irrigation (15-20 DAS+30–35 DAS)
T2 = Three irrigation (15-20 DAS+30–35 DAS+60–70 DAS)
T3 = Four irrigation (15-20 DAS+30–35 DAS+60–70 DAS + 85-90 DAS)
Effective rainfall (ERF)=------------------------ Eq. (1)
Rice equivalent yield, ------------- Eq. (2)