Organic management for yams (Dioscorea spp.) intercropped in coconut (Cocos nucifera) plantation: Evidences from a validation trial in the coastal humid tropics of Kerala, India


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Authors

  • G SUJA Indian Council of Agricultural Research
  • P SUBRAMANIAN ICAR-Central Tuber Crops Research Institute, Thiruvananthapuram, Kerala 695 017, India
  • R SUREKHA ICAR-Central Tuber Crops Research Institute, Thiruvananthapuram, Kerala 695 017, India
  • D JAGANATHAN ICAR-Central Tuber Crops Research Institute, Thiruvananthapuram, Kerala 695 017, India
  • C LINTU MARIA ICAR-Central Tuber Crops Research Institute, Thiruvananthapuram, Kerala 695 017, India
  • RAKHI K RAJ ICAR-Central Tuber Crops Research Institute, Thiruvananthapuram, Kerala 695 017, India

https://doi.org/10.56093/ijas.v92i8.98705

Keywords:

Alternative agriculture, coconut yam, yield, tuber proximate composition, soil fertility, cost, benefit analysis

Abstract

 A field experiment was conducted under Network Project on Organic Horticulture during 2015–17 (April-January) at ICAR-Central Plantation Crops Research Institute (ICAR-CPCRI), Kasaragod, to validate the ICAR-CTCRI developed organic farming technologies in yams under intercropping in an organically raised mature coconut garden (>48 years). Three species of Dioscorea [(greater yam (D. alata), lesser yam (D. esculenta) and white yam (D. rotundata)] were tested under four production systems, viz. traditional, conventional, integrated and organic, and replicated thrice in split plot design in a mature coconut garden. Organic practice was similar to conventional as revealed from the identical impacts on yield, tuber quality and soil chemical properties. Yield under organic management was 98.6% of conventional farming. D. alata and D. esculenta were more responsive (+8 to 10%) to organic management, but organic management lowered yield by 30% in dwarf white yam (D. rotundata). The organic farming package comprising farmyard manure, green manure cowpea, neem cake and ash resulted in higher available N, exchangeable Ca and available Zn in soil and significant improvement in K, higher P and Mg contents in yam tubers. However, the highest profit was realized from coconut + D. alata in integrated system (`1,87,057/ha). Among yams, greater yam (D. alata) was the most productive and profitable under organic management (`1,46,634/ha) in intercropping set up.

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Author Biography

  • G SUJA, Indian Council of Agricultural Research

    Principal Scientist, Division of Crop Production

    ICAR-Central Tuber Crops Research Institute, Thiruvananthapuram-695017, Kerala, India

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2020-03-02

Published

2022-03-28

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How to Cite

SUJA, G., SUBRAMANIAN, P., SUREKHA, R., JAGANATHAN, D., MARIA, C. L., & RAJ, R. K. (2022). Organic management for yams (Dioscorea spp.) intercropped in coconut (Cocos nucifera) plantation: Evidences from a validation trial in the coastal humid tropics of Kerala, India. The Indian Journal of Agricultural Sciences, 92(8), 966-969. https://doi.org/10.56093/ijas.v92i8.98705
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