Potassium and crop rotation impact under minimum tillage on carbon sequestration and water retention characteristics in soils of N-W Himalayas.

Book Title: NA
Year Published: 2007
Month Published: NA
Author: Ghosh, B. N. ; Khola, O. P. S. ; Dadhwal, K. S.
Book Group Author: NA

A field experiment on rainfed maize (Zea maize L.)/cowpea (Vigna sinensis L.)-wheat (Triticum aestivum L.)/lentil (Lens culinaris, Medikus)/mustard (Brassica juncea L.) was conducted for three years during 2002-2003 to 2004-2005 on 2% land slope to evaluate the effect of potassium application and crop rotations on carbon sequestration and water retention characteristics in a silty loam soil of north-western Himalayas. Application of 120 kg K2O ha-1 to kharif crops under minimum tillage significantly influenced the total maize grain equivalent yield of the cropping systems as compared to recommended dose of 40 kg K2O ha-1. The use of, both K fertilizers and leftover biomass of crops under minimum tillage increased the carbon sequestration in soil. The overall gain of soil organic carbon after three years in 0-45 cm soil depth in cowpea-mustard rotation with 120 kg K2O ha-1 was 0.25 g-C kg-1 soil as compared to maize-wheat rotation receiving 40 kg K2O ha-1. The gain of available water due to application of 120 kg K2O ha-1 ranged from 0.42 to 1.43 cm in 0-45 cm soil profile under different cropping systems compared to recommended dose of potassium. The cowpea-mustard crop rotation with 120 kg K2O ha-1 showed maximum gain of 1.43 cm available water in the 0-45 cm soil profile over recommended K.

Pages: 134 - 138
URL: http:////0-search.ebscohost.com.catalog.library.colostate.edu/login.aspx?direct=true&AuthType=cookie,ip,url,cpid&custid=s4640792&db=lah&AN=20073281007&site=ehost-live
Volume: 35
Number: 2
Journal: Indian Journal of Soil Conservation
Journal ISO: NA
Organization: NA
Publisher: NA
ISSN: 0970-3349

application rates, available water, biomass, carbonsequestration, cowpeas, crop yield, cropping systems, Indian mustard,lentils, maize, minimum tillage, organic carbon, potassium, potassiumfertilizers, rotations, silt loam soils, soil depth, soil organicmatter, soil profiles, soil types, soil water retention, wheat, India,Uttar Pradesh, Brassica juncea, Lens culinaris, Triticum, Triticumaestivum, Vigna unguiculata, Zea mays, Brassica, Brassicaceae,Capparidales, dicotyledons, angiosperms, Spermatophyta, plants,eukaryotes, South Asia, Asia, Developing Countries, Commonwealth ofNations, Lens, Papilionoideae, Fabaceae, Fabales, Triticum, Poaceae,Cyperales, monocotyledons, India, Vigna, Zea, black-eyed peas,Capparales, corn, crop rotation, minimum tillage systems, organic matterin soil, potash fertilizers, rainfed farming, rotational cropping,southern peas, Field Crops (FF005) (New March 2000), Plant Production(FF100), Plant Cropping Systems (FF150), Soil Chemistry and Minera

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