Competition,growth characteristics,and WUE of Astragelus adsurgensPall(A),Medicago sativaL.(B) and Lespedeza davuricaSchind(C) were investigated through three seeding modes at three seeding densities on highland Loess Plateau.When seeded alone,the productivity of the three legumes are 7 979 kg·hm-2,15 349 kg·hm-2,2 412 kg·hm-2 at low seeding density,16 440 kg·hm-2,20 582 kg·hm-2,5 270 kg·hm-2 at medium density and 21 055 kg·hm-2,21 531 kg·hm-2,7 102 kg·hm-2 at high density.For mixed-seeding,M.sativaand L.da...
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