A crop has effective root zone depth of $1200 \mathrm{~mm}$ and monthly ( 30 days) crop evapotranspiration of $260 \mathrm{~mm}$. The effective rainfall during 30 days period is $20 \mathrm{~mm}$. The field capacity and permissible soil moisture depletion (volume basis) are $16 \%$ and $8 \%,$ respectively. The irrigation interval in days for the crop will be
(A) 30
(B) 18
(C) 12
(D) 8
A crop has effective root zone depth of $1200 \mathrm{~mm}$ and monthly ( 30 days) crop evapotranspiration of $260 \mathrm{~mm}$. The effective rainfall during 30 days period is $20 \mathrm{~mm}$. The field capacity and permissible soil moisture depletion (volume basis) are $16 \%$ and $8 \%,$ respectively. The irrigation interval in days for the crop will be
(A) 30
(B) 18
(C) 12
(D) 8