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Influence of long-term conservation tillage in wheat on soil physical fertility and crop performance under rice-wheat cropping system

KrishiKosh

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Title Influence of long-term conservation tillage in wheat on soil physical fertility and crop performance under rice-wheat cropping system
 
Creator Ajeet Singh
 
Contributor Phogat, V.K.
 
Subject Indo-Gangetic Plains, Rice-wheat system, Soil physical properties, Wheat productivity, Zero tillage
 
Description Information about soil physical properties under different management systems is essential for
sustainability of agricultural systems. The long-term impact (15 years) of zero tillage in wheat under ricewheat
cropping system was evaluated on some physical properties and wheat productivity parameters in
three texturally different soils representing entire rice growing area of the State of Haryana. The
conventional (CT, two harrowing, one cultivator and planking) and zero tillage (ZT, direct drilling) systems
were investigated. The ZT found to increase the soil organic carbon (OC) content significantly to a depth of
0.10, 0.15 and 0.25 m in sandy loam, loam and clay loam soil, respectively, indicating its buildup to deeper
depths with increasing fineness of texture. It also resulted in reducing plough pan developed due to
continuous CT used in both rice and wheat crops. Soil dispersion reduced significantly at almost all the
depths and sites indicating better aggregation. The saturated hydraulic conductivity increased significantly
to a depth of 0.10 m with variable magnitude in different textured soils. The increase in magnitude for
surface layer was highest in loam (51 %) followed by sandy loam (40 %) and clay loam (38 %) soil.
Although water retention and aeration porosity increased in all the three soils under ZT but a significant
increase was observed in moisture content at field capacity to a greater depth (0.15 m) in clay loam soil.
Water intake rate also increased significantly in clay loam soil (28 %) over the CT treatment. The root
biomass measured in 0.4 m soil depth was significantly higher in all the soils but it was highest in sandy
loam followed by loam and clay loam soil under both the tillage systems. In addition, ZT favoured the deep
penetration of roots in all the soil types.
Overall effect of improvement in the soil physical properties under ZT resulted in significant increase in
mass of grains and consequently significant increase in yield of wheat in clay loam soil as compared to CT
treatment whereas no such effects were observed in other soils. Thus, the results indicate that the ZT
practice in wheat under rice-wheat cropping system may be adopted for sustaining the productivity of ricewheat
system, however, the practice is more suitable in fine textured soils as compared to medium or
coarse textured soils.
 
Date 2016-09-14T15:00:42Z
2016-09-14T15:00:42Z
2014
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/76726
 
Language en
 
Format application/pdf
 
Publisher CCSHAU