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- W2990395685 abstract "Four experiments were conducted on infertile, sandy podzolic and regosolic upland soils in north-east Thailand that had continuously grown roselle (Hibiscus sabdarrifa cv. altissima) and cassava (Manihot esculenta) for ten years without artificial fertiliser or manurial addition. The first experiment was a split-plot design with 16 mainplots and two subplots per mainplot. There was a three year ley phase followed by a 17 month cropping phase. The mainplots consisted of a cassava control, a three-year weed fallow, and four legume species (viz. Macroptilium atropurpureum cv. Siratro, Stylosanthes hamata cv. Verano, Crotalaria juncea and Mimosa invisa var. inermis) which were grown separately for 1, 2 or 3 years immediately before the first test crop (roselle), or grown in alternate years or conjunctionally with cassava. Legumes grown for two- and three-years were grazed. C. juncea was cut and mulched. One subplot received no artificial fertiliser and the other received non-nitrogenous fertilisers during the ley phase. At the end of the ley phase all plots were similtaneously sown to roselle, immediately followed by cassava. Yields of the first test crop following either two- or three-year fertilised Siratro or Verano leys were approximately double that following cassava control plots. Yields following fertilised weed fallow or other legume treatments were intermediate. However yields of cassava-grown conjunctionally with legumes were significantly reduced. Roselle yields from unfertilised plots were not significantly different from the cassava control plots. Results from the second test crop (cassava) were similar except that yields from unfertilised two and three-year Siratro and Verano plots were generally significantly greater than that of the control plots. Generally three-year legume leys did not increase crop yields more than the corresponding two-year leys." @default.
- W2990395685 created "2019-12-05" @default.
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- W2990395685 date "2019-11-07" @default.
- W2990395685 modified "2023-10-17" @default.
- W2990395685 title "UQ eSpace" @default.
- W2990395685 doi "https://doi.org/10.14264/8f077aa" @default.
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