The influence of effective microorganisms and high-molecular polysaccharides on the selected physical and aqueous properties of the mineral soil's arable-humus horizon.

Summary The paper concerns the results of the research whic h examined the influence of different doses of high -molecular polysaccharides (starch ‐ S and agar ‐ A) as well a s effective microorganisms (EM) on the basic physic al and aqueous properties of the mineral soil’s (specific black ea rth) arable-humus horizon. The samples of the viola ted and the intact structures were collected from controlled pot exper iment. The marked properties included: grain-size d istribution, soil density, solid phase density, the total and the dra inage porosity, filtration coefficient, soil’s potentials of water binding as well as the potential and the effective useful retention. It was affirmed that the additives affected the changes of most physical and aqueous soil properties. The impact wa s usually visible yet in most of the cases ‐ minor. The changes were usually positive and improved the potential possibi lities of plants’ vegetation. However, in some case s (the accessibility of water at high binging potentials) the impact was ne gative. The conjoined usage of both factors, i.e. A +EM or S+EM appeared to be unjustified.