Browse on keywords: soil quality microbial properties
Search results on 05/18/13
978. Bolton, H., L.F. Elliott, R.I. Papendick and D.F. Bezdicek. 1985. Soil microbial biomass and selected soil enzyme activities: effect of fertilization and cropping practices.. Soil Biol. Biochem., 17:297-302.
The microbial properties of two adjacent fields were compared, one being under organic management, the other conventional management. Microbial indices tended to be more favorable on the organic field, with higher microbial biomass and enzyme activities.
10596. Wardle, D.A. and D. Parkinson. 1990. Influence of the herbicide glyphosate on soil microbial community structure.. Plant Soil 122:29--37.
Four rates of glyphosate were applied to soil at log increments and incubated for 27 days. Bacterial propagule numbers were temporarily enhanced by the two highest rates, while actinomycete and fungal propagule numbers were not changed. The frequency of three fungal species was temporarily enhanced by the highest rate, while one was inhibited. There was little agreement between species responses to glyphosate in incubated soil and in pure culture.
10884. Collins, H.P., C.L. Douglas, and R.W. Smiley. 1989. Influence of crop residue management on heterotrophic bacterial diversity in wheat rhizosphers.. Agron. Abstracts, Amer. Soc. Agron. p. 212..
Over 3200 heterotrophic bacterial isolates were obtained from rhizospheres of wheat grown in long-term wheat-fallow and wheat-pea rotations at Pendleton, OR. Significant changes in microbial biomass and activity were identified, and the assays indicated differences in microbial diversity resulting from management.