Effects of mutual aid grow seedlings of cotton with other crops in the sameaperture on soil microorganisms quantity, enzyme activity and root secretion Research review on the pattern of carbon allocation to roots and environmental factors in forest ecosystem Physiological & ecological effects of companion-planted grow seedlings of two crops in the same hole Effects of straw returning and nitrogen fertilizer application on root secretion and nitrogen utilization of rice Effect of medium composition on the growth and secretion of cultured root of Astragalus adsurgens Pall Mobilization and uptake of insoluble phosphorus by different common bean genotyes Regulation of Growth Factors to the Secretion of Bacillus subtilis Fibrinolytic Enzyme in the Roots of Transgenic Tobacco Effects of partial replacing NO-3-N with amino acid on yield, quality and root secretion of pakchoi (Brassica chinensis L.)