THE DYNAMICS OF NITRATE NITROGEN BETWEEN THE ROWS OF APPLE PLANTATIONS UNDER VARIOUS SYSTEMS OF MAINTENANCE

The content of nitrate nitrogen in soil depends not only on fertilization, but also on system maintenance garden rows. Used in the experiment green manure: lupine, mustard, pea, vetch-oat mixture for a short period of 2.5 months creating biomass, intense expansion which in spring adds to soil available to plants mineral form of nitrogen, including nitric. In the spring and during the laying of generative buds in all variants of the experiment the nitrate content in the soil increased, and in the fall after harvest fruits ? declined. During the growing season the highest content of nitrate nitrogen in soil was observed in variants with sowing green manure, and the lowest - in the variant with natural grassing.