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- W2008656968 abstract "ABSTRACT The aim of this study was to investigate the N-fixation potential of different leguminous green manure plants grown in the autumn after harvest of a barley main crop. Fixed above ground N derived from the atmosphere (Ndfa) was estimated both by the 15N isotope dilution method and by the total-N difference method. Winter rape (Brassica napus), winter rye (Secale cereale) and Italian ryegrass (Lolium multiflorum) were grown as non-fixing control plants for the estimation of N-fixation of leguminous green manure plants. It was concluded that Italian ryegrass was the most suitable control plant, and that the choice of control plant can be important for the results. When using Italian ryegrass as control plant, no significant difference was observed between the total N difference method and the 15N isotope dilution method. N-fixation varied strongly among the plant species and differed between the two years. Hairy vetch (Vicia villosa), crimson clover (Trifolium incarnatum) and Persian clover (Trifolium resupinatum) fixed more than 100 kg N ha−1 at least in one of the two investigated years. The highest estimated Ndfa was 149 kg N ha−1 in the above ground plant material of hairy vetch in 1997. Ndfa of common vetch (Vicia sativa) and Egyptian clover (Trifolium alexandrinum) was below 60 or 100 kg N ha−1 in 1996 and 1997, respectively. Weather conditions and soil moisture, which are crucial during germination and early plant development, may be an explanation for lower N- fixation in 1996 than in 1997. With respect to N, the results indicate that extended use of green manure could strongly reduce the need for full year green manure crops in stockless organic crop rotations." @default.
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- W2008656968 date "2001-01-01" @default.
- W2008656968 modified "2023-09-27" @default.
- W2008656968 title "N-Fixation of Selected Green Manure Plants in an Organic Crop Rotation" @default.
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- W2008656968 doi "https://doi.org/10.1080/01448765.2001.9754897" @default.
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