The soil biomass and plant nutrition

THE SOIL BIOMASS AND PLANT NUTRITION 5.1. Plant-microbial interactions 

There are numerous plant-microbial interactions, and it is beyond the scope of this review to include them all. Some of the more important, in terms of plant nutrition and soil conditions, are mentioned here briefly. Various general reviews are available dealing with other topics such as plant pathogens, nitrification, denitrification, legumes, mycorrhizae, soil 

Organisms or their by-products can have a direct effect on the uptake properties of roots and both stimulation and inhibition of root 

Rhizosphere organisms produce organic acids such as 2-keto-gluconic acid which was suggested to have a chelating action on calcium, thereby improving 

The acid is also an efficient extractant of trace elements 

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