Abstract
A pot culture experiment was conducted in loamy sand soil to study the effect of different levels of FYM and CaCO3 on the dry matter yield and nutrients uptake by oats. Application of different levels of CaCO3 (0, 2, 4 and 8%) and FYM (0, 0.5, 1,2%) resulted in significant increase in dry matter yield of oats. But, a little decrease in dry matter yield was obtained at 4% FYM. The interaction of FYM×CaCO3 was also significant on dry matter yield of oats. There was a significant decrease in the concentration and uptake of P with increased levels of applied CaCO3. But, application of FYM resulted in a significant increase in concentration and uptake of P. A significant increase in concentration and uptake of Ca was observed with the increasing levels of CaCO3. The concentration of Ca decreased with the increased application of FYM in the presence as well as in the absence of added CaCO3. However, at 0.5 and 1.0 percent FYM with 4 per cent CaCO3 a little increase in Ca concentration was recorded. The Mg concentration in oat decreased significantly with the increasing levels of CaCO3 and FYM. The effect of CaCO3 levels was more pronounced in the absence as well as in the presence of FYM. The Mg uptake followed a different pattern. At 0 and 2% CaCO3 and application of FYM @ 1 per cent the Mg uptake increased but then it decreased with increasing levels of FYM and CaCO3 both alone as well as in the presence of each other. The concentration and uptake of Mn decreased with increasing levels of applied CaCO3. However, in the absence of CaCO3, the application of FYM increased the concentration and uptake of Mn in oats. In the presence of CaCO3, Mn concentration decreased at all levels of FYM application but at 8 per cent CaCO3 there was a slight increase in Mn concentration with 0.5, 2 and 4 percent FYM. Iron concentration and uptake was also affected adversely by increasing levels of CaCO3 but FYM application removed the harmful effect of CaCO3 to some extent.
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