LONG-TERM APPLICATION OF FERTILIZERS AND LIME IN A CROP ROTATION ON GRAY FOREST SOIL IN CISBAIKALIA
A positive effect of fertilizers and lime material on the agrochemical properties of gray forest soil and the productivity of rotation crops has been established. The regular application of mineral fertilizers and green manure reliably increased the contents of humus and total nitrogen, and liming favored the neutralization of soil acidity. The highest productivity of crop rotation (about 50 dt g.u./ha) was ob- tained at the application of complete fertilizer and the simultaneous liming. The recoupment of fertilizers was 8-9 kg/kg a.i.; that of lime was 3.6-4.1 dt/kg a.i.