Conservation tillage effects on soil physical properties, organic carbon concentration and productivity of soybean-wheat cropping system
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Title |
Conservation tillage effects on soil physical properties, organic carbon concentration and productivity of soybean-wheat cropping system
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Creator |
KM Hati, RK Singh, KG Mandal, KK Bandyopadhyay, J Somasundaram, M Mohanty, NK Sinha, RS Chaudhary, AK Biswas
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Subject |
Soil organic carbon, Conservation tillage, Soil physical properties, Nitrogen
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Description |
Not Available
Excessive disturbance of the top soil through intensive tillage operations and removal of residues in conventional tillage systems result in breakdown of soil structure, accelerated oxidation, consequent loss of soil organic carbon (SOC) content and release of carbon dioxide to the atmosphere. In conservation tillage system, crop residues are retained and tillage operations are kept at minimum, which stimulates sequestration of SOC and improvement in soil health. This study was conducted to evaluate the long-term impact of conservation tillage on SOC concentration, physical health and productivity of soybean-wheat system after nine crop cycles. Treatments consisted of four tillage systems viz., conventional tillage (CT), mouldboard tillage (MB), reduced tillage (RT) and no tillage (NT) as the main plot, and three nitrogen (N) levels viz., 50% (N50%), 100% (N100%) and 150% (N150%) of the recommended rate as sub-plot. Results showed that the SOC content up to 15 cm soil depth were significantly higher in NT, RT and MB where wheat residues were left after harvest, than that in CT system. The SOC in MB were significantly higher than CT in 15-30 cm soil layer. Soil water retention at 4 cm and at air entry potential (50 cm suction) was significantly higher in NT, MB and RT treatments than in CT. Soil physical properties viz., infiltration rate, bulk density, mean weight diameter and water stable aggregation also improved under NT and RT. The SOC and aggregate stability were higher in N150% as compared to N50%. Soil water retention did not vary among the N levels. However, yields of both the crops were similar under the tillage systems.Not Available Not Available |
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Date |
2019-11-27T09:37:41Z
2019-11-27T09:37:41Z 2014-01-01 |
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Type |
Research Paper
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Identifier |
Not Available
0973-032X http://krishi.icar.gov.in/jspui/handle/123456789/25636 |
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Language |
English
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Relation |
Not Available;
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Publisher |
Journal of Agricultural Physics
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