National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Polyhouse technology has potential to achieve production to the tone of about Four to five times than open cultivation, but gradually soil fertility get exhausted in the period of 5 to 7 years. Micronutrients are one of the essential components of soil system that plays a significant role in balanced plant nutrition. The present study was conducted on 56 soil samples collected from polyhouses of four districts of H.P. to work out the different chemical fractions of iron and manganese and their relation to soil physico-chemical properties. The soil texture varied appreciably from sandy loam, loam to clay loam. Soil pH (1:2), OC (g kg-1) and CEC (cmol (p+) kg-1) found in the range of 5.39 – 7.70, 2.40-28.50 and 4.00-43.59, respectively. Various Fe fractions were present in the relative abundance series of water soluble < exchangeable < easily reducible manganese < carbonate bound < organic matter bound < iron and aluminium oxide < residual fraction. Different forms of manganese were present in the order of water soluble < exchangeable < organic matter bound < carbonate bound < iron and aluminium oxide bound < easily reducible manganese < residual. The residual form contributes the greatest among all other fractions. The soil pH was found to be negatively correlated with various Fe and Mn fractions while OC was found to be positively correlated with various fractions. The various fractions were variably correlated with each other showing their interdependence and forms the major source of available pool of micronutrients in soil.
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