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Resource conservation strategies for rice‐wheat cropping systems on partially reclaimed sodic soils of the Indo‐Gangetic region, and their effects on soil carbon

Author

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  • V.K. Mishra
  • S. Srivastava
  • A.K. Bhardwaj
  • D.K. Sharma
  • Y.P. Singh
  • A.K. Nayak

Abstract

The Indo‐Gangetic plain is characterized by intensive agriculture, largely by resource‐poor small and marginal farmers. Vast swathes of salt‐affected areas in the region provide both challenges and opportunities to bolster food security and sequester carbon after reclamation. Sustainable management of reclaimed soils via resource conservation strategies, such as residue retention, is key to the prosperity of the farmer, as well as increases the efficiency of expensive initiatives to further reclaim sodic land areas, which currently lay barren. After five years of experimentation on resource conservation strategies for rice‐wheat systems on partially reclaimed sodic soils of the Indo‐Gangetic region, we evaluated changes in different soil carbon pools and crop yield. Out of all resource conservation techniques which were tested, rice‐wheat crop residue addition (30% of total production) was most effective in increasing soil organic carbon (SOC). In rice, without crop residue addition (WCR), soils under zero‐tillage with transplanting, summer ploughing with transplanting and direct seeding with brown manuring showed a significant increase in SOC over the control (puddling in rice, conventional tillage in wheat). In these treatments relatively higher levels of carbon were attained in all aggregate fractions compared to the control. Soil aggregate sizes in meso (0.25‐2.0 mm) and macro (2‐8 mm) ranges increased, whereas micro (

Suggested Citation

  • V.K. Mishra & S. Srivastava & A.K. Bhardwaj & D.K. Sharma & Y.P. Singh & A.K. Nayak, 2015. "Resource conservation strategies for rice‐wheat cropping systems on partially reclaimed sodic soils of the Indo‐Gangetic region, and their effects on soil carbon," Natural Resources Forum, Blackwell Publishing, vol. 39(2), pages 110-122, May.
    • Handle: RePEc:wly:natres:v:39:y:2015:i:2:p:110-122
    DOI: 10.1111/1477-8947.12071
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    1. Ladha, J.K. & Fischer, K.S. & Hossain, M. & Hobbs, P.R. & Hardy, B., 2000. "Improving the.Productivity and Sustainability of Rice-Wheat Systems of the lndo-Gangetic Plains: A Synthesis of NARS-IRRI Partnership Research," IRRI Discussion Papers 287597, International Rice Research Institute (IRRI).
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    1. Yifu Zhang & Wancheng Wang & Wei Yuan & Ruihong Zhang & Xiaobo Xi, 2021. "Cattle Manure Application and Combined Straw Mulching Enhance Maize ( Zea mays L.) Growth and Water Use for Rain-Fed Cropping System of Coastal Saline Soils," Agriculture, MDPI, vol. 11(8), pages 1-14, August.

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