BIOMETRIC RESPONSE OF CHILLI UNDER MICRO IRRIGATION PRACTICES - Management, Performance, and Applications of Micro Irrigation Systems - page 158

12.2.3 IRRIGATION SCHEDULING
Irrigation scheduling was planned to provide the estimated water requirement of the
crop. Irrigation was scheduled based on the daily crop water requirement. In order to
determine the optimum water requirement for the crops, three irrigation levels were
adopted. which were 65, 75 and 85% of water requirement of chili. The discharge rate
of the emitter was 4 L per hour at a nominal pressure of 1.5 kg (f)/cm 2 . Time required
for each irrigation is shown in Table 2.

TABLE 2 Irrigation duration for each treatment.

Treatments Time required for irrigation, min Water required for irrigation,

liters/day

T1 17.83 1.1

T2 35.66 1.1

T3 21.08 1.3

T4 42.16 1.3

T5 24.32 1.5

T6 48.64 1.5

12.2.4 FERTIGATION SCHEDULING
The fertigation was scheduled at weekly intervals. The entire phosphorous was ap-
plied as basal application. Nitrogen and potassium were applied through fertigation
with 20 equal splits from third week to tenth week after planting. The recommended
soluble fertilizers were applied simultaneously in a combined form to the root zone.
The calculated amount of phosphorous was applied manually as a basal dose. Urea,
poly feed (19:19:19) and Rajphos fertilizers were applied through fertigation. Fertil-
izer requirement for chili is shown in Table 3.

TABLE 3 Fertilizer requirement for chili.

Treatment
(%)

Fertilizer required (g)

Urea Polyfeed Rajphos

100 1025 1243 709

Control 220 270 56

Recommended dose (kg per ha) of N: P: K is 75: 45: 20