An Asian Journal of Soil Science

L. Asha ¹, H. M. Chidanandappa ², P. Veeranagappa ², T. S. Punith Raj ²

Affiliations
1 Department of Soil Science and Agricultural Chemistry, College of Agriculture, Navile, Shimoga, (Karnataka), IN
2 Department of Soil Science and Agricultural Chemistry, University of Agricultural Sciences, G.K.V.K., Bengaluru (Karnataka), IN

Abstract

A field experiment was conducted on a Typic Haplustalf with sandy loam texture to study the effect of different methods of zinc application on growth and yield of maize. Results indicated that different methods of zinc application significantly increased the grain yield and stover yield of maize compared to control except the treatment which received seed priming with one per cent zinc solution for 8 hour. However, the treatment which received soil application of zinc sulphate @ 10 kg ha^-1 recorded maximum yield of 7.52 t ha^-1 and 6.96 t ha^-1 of stover and grain, respectively.

Keywords

Maize, Zinc, Yield, Yield Attributes.

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P. Veeranagappa ¹, H. C. Prakasha ¹, K. R. Ashoka ¹, M. M. Venkatesha ², M. B. Mahendra Kumar ¹

Affiliations
1 Department of Soil Science and Agricultural Chemistry, College of Agriculture, University of Agricultural Sciences, G.K.V.K., Bengaluru (Karnataka), IN
2 Department of Agronomist, C.C.R.I., Balehonnur (Karnataka), IN

Abstract

A field experiment was conducted on a Typic Haplustalf with sandy loam texture to study the effect of Zn-E compost on soil properties and distribution of zinc fractions in soil. The experiment was laid out in Randomized Complete Block Design with three replications. There were eight treatments comprising of recommended dose of compost, NPK fertilizers, ZnSO₄ and zinc enriched compost. Application of NPK + compost + ZnSO₄ at 20 kg ha^-1 and different levels of Zn-E compost treated plots recorded significantly higher values of primary, secondary and micronutrients in soil at tillering, panicle initiation and at harvest stages. A slight improvement in soil pH, electrical conductivity and organic carbon content noticed higher values in NPK + zinc enriched levels followed by package of practice. The application of Zn-E compost increased the amount of zinc present in different fractions. Increase in amount of zinc present in different zinc fractions might be due to the higher solubility and mobility of the added zinc source. Water soluble plus exchangeable fractions significantly increased with the enrichment of compost.

Keywords

Zn-E Compost, NPK, Zinc.

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K. R. Ashoka ¹, T. H. Hanumantharaju ¹, M. B. Mahendra Kumar ¹, Chakpram Birendrajit ¹, Atheefa Munawery ¹, P. Veeranagappa ¹

Affiliations
1 Department of Soil Science and Agricultural Chemistry, University of Agricultural Sciences, G.K.V.K., Bengaluru (Karnataka), IN

Abstract

A season study (December 2008 to march 2009) was undertaken with potato crop and was found that propineb residue degraded faster in potato under field condition when applied at 1400 and 2800 g a.i ha^-1. However, the propineb was noticed in soil on the day of propineb spray. Degradation was faster at lower dose of than higher dose of application with the half-life values of 2.3 and 2.5 days. The safe waiting period of 3.3 and 4.3 days was recommended for potato when applied at 1400 and 2800 g a.i ha^-1 of propineb.

Keywords

Propineb, Potato, Degradation, Bisdithiocarbamate.

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