Department of Agricultural Chemistry and Soil Sciences, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur-741252, India
*Corresponding author's e-mail: kanupran@yahoo.co.in, Department of Agricultural Chemistry and Soil Sciences, College of Horticulture and Forestry, CAU, Pasighat, 791102, India
Online published on 15 September, 2012.
A pot culture experiment was conducted on rice to study critical limit of boron (B) in soils of alluvial zone of West Bengal. The hot water soluble B in these soils was found to be positively and significantly correlated with pH, organic carbon, CEC, and per cent dry matter yield of rice, B concentration in plant tissues and B uptake by shoots. The critical concentration of soil available B and plant tissues B was worked out to 0.35 and 12.0 mg kg1, respectively below which appreciable responses to B application were observed. The average dry matter yield increasesd with increasing level of B application upto 0.5 mg kg1. The response to B application in rice on B deficient soils was found to be 55.9%.
Boron, Bray's per cent yield, Critical limits, Alluvial zone, Rice
