Effect of nitrogen fertilisers on the yield of crop-root residues in cereal-grass crop rotation

The yield of plant residues in cereal-grass crop rotation in the conditions of the Republic of Mari El was studied in 2013-2018. After the use of clover-alfalfa-timothy mixture, crop-root residues and nutrients contained in them are ploughed in large amounts. At the same time, the application advantages of nitrogen fertilisers increase towards the end of rotation when annual grasses are cultivated.