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Green manuring: its effect on soil properties and crop growth under rice-wheat cropping system.

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Title Green manuring: its effect on soil properties and crop growth under rice-wheat cropping system.
Green manuring: its effect on soil properties and crop growth under rice-wheat cropping system.
 
Creator ICAR_CRIDA
 
Subject Green manuring; Sesbania ; Soil physical properties; Root growth; Rice /wheat system
 
Description Not Available
A field experiment was conducted on rice (Oryza sativa L.) and wheat (Triticum aestivum L.) during rainy and winter
seasons of 1994 /95 in a clay loam soil (Typic Ustochrept) at the experimental farm of Indian Agricultural Research
Institute, New Delhi, India. The objectives were to study the influence of different green manuring (Sesbania rostrata,
Sesbania aculeata , green gram (Vigna radiata ) residues) and in combination with different levels of nitrogen (0, 60, and
120 kg N ha 1) on physical properties, organic matter and total nitrogen contents of soil and on root growth and
spectral response of rice and wheat crop. The organic matter and total soil nitrogen concentrations were found to be
higher under green manuring treated plots than summer fallow. The magnitude of reduction in bulk density due to
green manuring over fallow was 0.03 /0.07 Mg m 3 in 0 /15 cm soil layer and 0.05 /0.09 Mg m 3 in 15 /30 cm soil
layer during the growth of rice and wheat. Green manuring improved the soil physical environments as was evident
from higher values of mean weight diameter and saturated hydraulic conductivity than fallow. The better physical and
chemical environment in Sesbania (S) and green gram residue incorporated plots influenced higher Normalized
Difference Vegetation Index (NDVI) than under fallow. The NDVI attained peak values at 62 days after transplanting
of rice and 90 days after sowing of wheat. The root length density (RLD) and yields were higher in green manure plots
than in fallow both in rice as well as in succeeding wheat crop. In all cases, in both rice and wheat the application of 120
kg N ha 1 treatment resulted in higher RLD than 60 kg N ha 1 and no nitrogen treatments. Poor soil conditions were
mainly responsible for restricted root growth and its distribution in surface soil layer in summer fallow plots.
# 2002 Elsevier Science B.V. All rights reserved.
Not Available
 
Date 2020-02-25T06:58:30Z
2020-02-25T06:58:30Z
2003
 
Type Technical Report
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/32698
 
Language English
 
Relation Not Available;
 
Publisher Sharma, K.L.