EFFECTS OF SOLONETZ SOIL HORIZON MIXING ON THE AVAILABILITY OF NITROGEN TO PLANTS IN THE GREENHOUSE

Abstract

Samples of individual and mixed horizons of Solonetz soils were incubated and analyzed for NO3-N. Similar samples were used for the production of barley seedlings in which the plant uptake of N was measured. The measurement of NO3-N in soils after incubation showed, in general, that there was less mineralization of N in mixed horizons than in Ap horizons, although for three of the four soils, N taken up by barley seedlings was greater from the mixed horizons than from the Ap horizons.