Astragalus adsurgens Is not Suitable Interplant in Armeniaca vulgaris×A. sibiricaOrchard in Loess Hilly and Gully Region EFFECTS OF UNDERGROWTH PLANT ON SOIL FERTILITY IN CHINESE FIR PLANTATION Astragalus adsurgens Is not Suitable Interplant in Armeniaca vulgaris×A. sibiricaOrchard in Loess Hilly and Gully Region Effects of rhizosphere ventilation on growth and root activity of potted maize Effects of Mo fertilization on growth, nutrient and total saponin contents of Pairs polyphylla var. yunnanensis Stem Respiration of a Larch (Larix gmelini) Plantation in Northeast China Research of relation about soil water contain in zone of acration and vegetation growth status at oasis of riverside in lower reaches of Heihe River Early Growth Analysis of 5 Banksia robur Provenances Growth and Physiological Adaptability of Three Hybrid Poplars Planted in Different Saline-alkali Soil