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- W2015708235 abstract "Abstract In 1983, a study was conducted to evaluate three weed species for their biomass yield potential on a fallowed tomato land with various nitrogen (N) rates and sources. Dogfennel ( Eupatorium capillifolium (Lam.)Small), sida ( Sida rhombifolia L.), and pigweed ( Amaranthus hybridus L.), were grown with three N rates: residual, 1x and 2x (1 x = 56 kg ha −1 N) and with two N sources: NH 4 NO 3 and isobutylidene diurea (IBDU). Sida produced the greatest fresh and dry biomass yields and percentage dry matter, 43·3, 23·3 Mg ha −1 and 54·1%, respectively. Yields of the three crops increased with increasing N rates and were higher with NH 4 NO 3 than with IBDU. Overall, sida at the 2x N rate with NH 4 NO 3 had the highest fresh, 73·8 Mg ha −1 , and dry biomass, 37·9 Mg ha −1 , yield. Lowest residual soil total soluble salt concentration, 170 ppm, was found after pigweed, in plots which did not receive additional N. Additional N application increased residual soil total soluble salts after each of the three weeds. Thus, additional N, in NH 4 NO 3 form, was necessary for high yields in a fallowed vegetable land, but the additional fertilizer also increased soil total soluble salts, regardless of the plant species." @default.
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- W2015708235 date "1987-01-01" @default.
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- W2015708235 title "Effects of supplemental nitrogen rate and source on biomass production by three weed species in fallow vegetable land" @default.
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- W2015708235 doi "https://doi.org/10.1016/0144-4565(87)90004-7" @default.
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