Department of Agricultural Chemistry, Raja Balwant Singh College, Bichpuri, Agra, Uttar Pradesh
*Present address: Department of Soil Science, Himachal Pradesh Agricultural University, Palampur, Kangra, Himachal Pradesh
In all 1028 irrigation water samples were collected from three districts of Agra region and to study the effect of quality of waters on soils and crops, 63 bench mark spots were surveyed and a micro-plot experiment on wheat crop with ten natural waters was conducted for two years. The results showed that existing systems of water classification were not suitable for this region. On the basis of statistical relationship, the EC limits of waters were less than 8, 8 to 12, 12 to 16 and more than 16 mmhos/cm for reduction in the grain yield of wheat to the extent of not more than 12.5, 12.5 to 25.0, 25.0 to 50.0 and more than 50 per cent, respectively. The corresponding salinity hazards of waters were designated as low, medium, high and very high and these ratings were found suitable for evaluating the irrigation waters of the region with respect to wheat crop.
Water quality evaluation, wheal, Agra region
