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Effect of Long-Term Conservation Tillage on Soil Physical Properties and Soil Health under Rice-Wheat Cropping System in Sub Tropical India

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Title Effect of Long-Term Conservation Tillage on Soil Physical Properties and Soil Health under Rice-Wheat Cropping System in Sub Tropical India
Not Available
 
Creator V. P. Chaudhary, B. Gangwar, Shikha Gangwar
 
Subject Zero tillage; Conservation tillage; Crop establishment method; Rice- wheat cropping system
 
Description Not Available
Tillage inf luence soil aggregation,
microbial activity in the soil
and enhance the oxidation of soil
organic carbon (SOC). A long term
study was carried out to investigate
the impact of conservation tillage
on soil aggregates, SOC and
microbial biomass carbon (MBC)
in rice (Oryza sativa)-wheat (Triticum
aestivum) cropping system at
experimental station of Varanasi,
Uttar Pradesh under the aegis of All
India Co-ordinated Research Project
(AICRP) of Integrated Farming Systems
(IFS) during 2003-10. The four
rice crop establishment techniques
i.e., direct seeding in zero tilled soil
(P1), wet seeding of sprouted rice
seed with drum seeder in puddled
condition (P2), manual transplanting
in puddled soil (P3) and mechanical
transplanting in puddled soil
(P4) served as horizontal treatments
while four tillage practices in wheat
(i.e. T1- rotavator till drill, T2- conventional
sowing, T3- strip till drilling,
T4- Zero till drilling) served
as vertical treatments in strip plot
design with three replications. Total
water stable aggregates (WSA)(>
0.053 mm) in the soil at surface 0-15
cm depth, ranged between 69.92
and 88.78 % in rice crop, while in
winter crop it varied between 74.62
and 83.57 %. According to mean
weight diameter (MWD) different
treatments in regard to crop establishment
technique of rice could be
ranked in the order P1 > P4 > P2 > P3
and T4 > T3 > T1 > T2 in wheat strip
regarding tillage practices. However,
the MWD decreased drastically
in lower soil depth. The SOC ranged
from 4.06 to 5.67 g kg-1 in soil samples
from rice plots and from 4.32 to
5.24 g kg-1 in different tillage treatments
in wheat at surface 0-15 cm
layer. SOC contents in direct seeding
in zero tilled rice strip (5.67 g
kg-1) and zero till drill in wheat strip
(5.24 g kg-1) were significantly higher
than other treatments in all soil
depth. The MBC of direct drilling
zero tilled (441 μg g-1) in rice strip
and zero till drill in wheat strip (395
μg g-1) had the highest values while
the manually transplanted-puddled
(383 μg g-1) rice and conventional
wheat sowing had the lowest values
(334 μg g-1) at all the depths. The
differences were significant in at P
< 0.01 for both SOC and MBC and
ranked in order of P1 > P2 > P4 > P3
of rice crop strip and T4 > T3 > T1
> T2 in wheat crop strip under 0-15
cm soil depth. The decrease in SOC
an average all treatments was about
51 and 89 percent from layer 0-15
to 15-30 and 30-45 cm, respectively.
The interaction effects of P at same
level of T and T at same level of
P treatments on MWD, SOC and
MBC were significant (P < 0.01) in
0-15 and 15- 30 cm soil depth.
Not Available
 
Date 2019-12-03T06:31:34Z
2019-12-03T06:31:34Z
2015-11-01
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/26517
 
Language English
 
Relation Not Available;
 
Publisher Researchgate