Profile Distribution of Different Forms of Boron in Typic Haplustalfs of Punjab

摘要

Profile as well as surface samples were collected from Typic Haplustalfs (Gurdaspur series) of Punjab for determination of different forms of boron. Surface soils were loam in texture with organic carbon content varying from 0.30 to 1.02%. Water soluble B ranged from 0.14 to 0.28 mg kg~(-1); hot water soluble boron from 0.20 to 0.72 mg kg~(-1); and leachable B from 0.26 to 0.84 mg kg~(-1). The total boron content in these soils varied from 18.16 to 28.54 mg kg~(-1). Available boron content was positively and significantly correlated with clay (r=0.656**), silt (r=0.462*) and CEC (r=0.592**) and was negatively correlated with sand content (r=-0.585**). About 54% of the overall samples tested were low to medium in available boron.