Vol. 20 No. 1
Nutrient indexing of cationic micronutrients under intensively rice grown Inceptisols
Author(s): B. SAHA, N.CHATTERJEE, A.FATIMA, S. K. DUTTA, S.SAHA AND R. PODDAR
Abstract: The experimentdelineated micronutrient (Zn, Cu, Fe and Mn) availability in the soils of two intensively rice-cultivated districts falling under the Inceptisols soil order of West Bengal, India. Available Zn in cultivated soils of Nadia varied between 0.03 to 4.06 mg kg-1 with anaveragevalue of 1.03 mg kg-1. The major portion of the soil samples (74.9%) falls under low category (0.6-1.2 mg kg-1) while only 2.43% samples were deficient in available Zn in that district. Nutrient index value (NIV) of Zn availabilityin soil of this district was also calculated (NIV=1.24) and found to be low. Availability of Zn in soils of Coochbehar district varried between 0.24 to 4.82 mg kg-1 with anaverage value of 1.33 mg kg-1.There also majorpart of the samples was in low (52.8%) and medium (38.5%) category and very few samples (2%) were deficient in available soil Zn. On the other hand, Cu, Fe and Mn availability in all the soil samples were high and the NIV was also high, excepting for available Mn in Coochbehar district. Thus, results revealed that soils of the investigated districts were potential Zn deficient areas. Application of Zn both as soil as well as soil plus foliar might be beneficial in enhancing the yield and quality of crops of these districts.
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