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- W2004361804 abstract "Abstract ‘Yuchi’ arrowleaf clover ( Trifolium vesiculosum Savi) and ‘gulf’ ryegrass ( Lolium multiflorum Lam) are commonly grown together but their competitive relationship for fertilizer N has not been determined. Two greenhouse experiments were conducted to examine this relationship and to determine the effects on biological N 2 fixation. Seeds were sown in a Norwood soil (fine‐silty, mixed [calcareus], thermic Typic Utifluvent) that was mixed with vermiculite (Exp. I) or sand (Exp. II). Nitrogen was applied at different rates during the seedling stage to plants sown in pure and mixed stands. In Exp. I, plants were grown for 8 weeks. In Exp. II, plants were grown for 20 weeks and three clippings were taken. The N source was 99% 15 N depleted NH 4 NO 3 . Ryegrass in mixed stand accumulated several times more fertilizer N than its clover component. But clover in pure stand accumulated similar quantities of fertilizer N as the ryegrass in pure stand. The percentage of total N 2 fixed in the clover was usually decreased with increasing fertilizer N rates due to increased fertilizer N uptake. Total N in the clover from N 2 fixation was often not significantly altered with increasing fertilizer N rates which indicates that fixed N was complimenting the N taken up from the fertilizer." @default.
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- W2004361804 date "1987-01-01" @default.
- W2004361804 modified "2023-09-26" @default.
- W2004361804 title "Competition for Nitrogen-15 Depleted Ammonium Nitrate and Nitrogen Fixation in Arrowleaf Clover-Gulf Ryegrass Mixtures" @default.
- W2004361804 doi "https://doi.org/10.2136/sssaj1987.03615995005100010025x" @default.
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