The effect of planting density on three legumes productivity and WUE in highland of Loess Plateau was studied by field experiment.Astragelus adsurgens.of high planting density reached to its highest productivity(18321 kg·hm-2) in the second year and then declined in the following year.The productivity of Medicago sativa.of both medium and high planting densities peaked(22563 kg·hm-2 and 22108 kg·hm-2,respectively)in the third year;no significant amplitude and increment between them were detected.The highes...
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