STATUS OF AVAILABLE BORON IN MAJOR SOIL SERIES OF DELHI

摘要

No information is available on the status of available boron in the cultivated soils of Delhi State. Therefore, two hundred and fifty surface (0-0.15 m) soil samples from ten major soil series (25 samples from each soil series) under the order Inceptisol were collected from cultivated fields of Delhi State to find out the status of available boron. Soil samples were extracted with hot 0.01 M CaCl_2 and analysed by azomethine-H colorimetric method. Considering the critical level of 0.5 mg kg~(-1), about 10 per cent of the soil samples were found deficient in available boron, while 39 and 51 percent of the soil samples were classified in medium and sufficient range, respectively.