The use of cultivated land retired from active rotation

The paper describes trends in the evolution of vital signs of a long-lived five-component grass stand and agrochemical properties of soils under it at the reserve field of the agroecological testing ground of All-Russian Research Institute of Reclaimed Lands identified on the basis of long-term monitoring. The nature of changes in hay yield, botanical composition of herbs and agrochemical properties of the soil during aging of the stand is shown. It was revealed that the average yield of hay over the landfill during the observation period was less than 4 t/ha, its elevated values are observed on the slopes, especially noticeable in periods favorable under weather conditions. It has been shown that over the years of observations there has been a steady downward trend in the yield of the five-component grass mixture. The results of a statistical analysis of the dependence of hay yield on the botanical composition of the stand in different years are given. Regression analysis showed that in 2003-2005...