Effect of Surface Residue Management under Minimum Tillage on Crop yield and Soil Quality Indices after 6 years in Sorghum (Sorghum bicolor (L.) Moench) - Cowpea (Vigna unguiculata) System in Rainfed Alfisols
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Title |
Effect of Surface Residue Management under Minimum Tillage on Crop yield and Soil Quality Indices after 6 years in Sorghum (Sorghum bicolor (L.) Moench) - Cowpea (Vigna unguiculata) System in Rainfed Alfisols
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Creator |
K.L Sharma, K. Sammi Reddy, G. Ravindra Chary, A.K. Indoria, K. Srinivas, D. Suma Chandrika, Munna Lal, M. Prabhakar, G. Prathiba, Pravin Thakur, M. Vasavi and P. Haindavi
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Subject |
Alfisol, crop yields, crop residue, minimum tillage, rainfed, soil quality indices, sustainability
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Description |
Not Available
ABSTRACT: This experiment was conducted in rainfed semi-arid tropical Alfisol at Hayathnagar Research Farm of Central Research Institute for Dryland Agriculture, Hyderabad, India, during the period 2005 to 2010 to study the long-term effect of varying levels of surface residue application under minimum tillage on crop yields and soil quality in sorghum-cowpea system. The experiment was conducted in a randomized block design with minimum tillage (MT) as main block. The experimental treatments comprised of application of four levels of dry sorghum residues (@ 0, 2, 4 and 6 t/ha) as surface application. After 6th year of the experimentation, the pooled mean sorghum grain yield varied from 1607 to 1819 kg/ha across the treatments and was significantly influenced by the residue application. The percent increase in pooled grain yields with residue application @ 2, 4 and 6 t/ha was to the extent of 5, 9 and 13.0% respectively over the control (no residue application). Similarly, the pooled mean cowpea yield varied from 335 to 541 kg/ ha across the treatments and was significantly influenced by the residue application. The percent increase in cowpea grain yield with @ 2, 4 and 6 t/ha was to the extent of 28, 61 and 45% respectively no residue application. Significantly higher organic carbon (6.80 g/kg) content was recorded with the application of sorghum stover @ 6 t/ha which was 55.89% higher compared to control (4.36 g/ kg). The increase in available N with the application of 6t and 4t crop residue was to the extent of 19.5 and 28% respectively while significantly higher contents of soil available P (10.67 kg/ha) and K (288.8 kg/ha) were observed with application of sorghum residue @ 4 t/ha. Among the biological properties, significantly higher microbial biomass carbon (MBC) and dehydrogenase activity (DHA) were recorded with the application of sorghum stover @ 4 t/ha. Besides reducing the bulk density, the application of residues had a significant influence on the mean weight diameter (MWD) of the soil aggregates. The highest overall soil quality index (SQI: 9.58) was observed with the residue application @ 6 t/ha. A significant positive relationship was observed between SQI and pooled cowpea seed yield (R2=0.82) and pooled sorghum grain yield (R2=0.69). Not Available |
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Date |
2018-09-19T07:23:42Z
2018-09-19T07:23:42Z 2018-06-01 |
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Type |
Research Paper
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Identifier |
Not Available
Not Available http://krishi.icar.gov.in/jspui/handle/123456789/7021 |
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Language |
English
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Relation |
Not Available;
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Publisher |
ISDA
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