View article

Percolation loss of water in rice fields is a major factor of low water use efficiency of irrigated rice thus threatening its sustainability. The process of water percolation was studied in a puddled sandy loam rice field with three puddling intensities—no puddling (unpuddled), two passes of tractor-drawn cultivator+one planking (medium-puddling), and four passes of tractor-drawn cultivator+one planking (high-puddling), each at shallow (5–6cm) and normal (10–12cm) depths. Percolation losses of water decreased with medium-puddling by 54–58%, but it remained unaffected by increased puddling intensity and puddling depth. Percolation rate (PR) decreased with time with both medium- and high-puddling but it increased with increased depth of ponding water. The PR of water recorded in infiltration rings was 1.8, 38.8 and 42.1% less than that recorded in the whole plots thereby indicating the role of under-bund losses …