Three-factorial field experiment on agricultural practices in spring wheat cultivation in short-term monoculture was conducted in the years 2012-2013 in Chełmce (52^o61’ N; 18^o44’ E), on the soil of a good rye complex. The experimental factors included: A – tillage method connected with the application of organic matter (five variants with a post-harvest tillage with a grubber and pre-winter plough or without ploughing, and with the use of manure and stubble catch crop biomass – white mustard), B – method of application of post-harvest residues (four variants with the use of straw and effective microorganisms or without), C – application of a biostimulant Asahi SL (two levels). The aim of the study was determination of the effect of these factors on the yield components and grain yield in spring wheat cultivated in the 2^nd and 3^rd year of monoculture. Grain yield of spring wheat in the first year of research was by 25% higher than in the second year, which to some extent confirms low tolerance of this plant to being cultivated after itself. In the spring wheat monoculture, especially in the third year, grain yield was beneficially affected by the application of manure mixed with soil with a grubber and pre-winter plough, as well as manure and biomass of white mustard mulching the field through winter with tillage reduced to grubbing. The yield-producing effect of shredded straw with an inoculum of effective microorganisms applied into the soil manifested itself only in the initial period of monoculture, the second year, and with no manure application. In case of organic fertilization as well as in the subsequent year of monoculture, the use of straw and effective microorganisms did not affect beneficially the grain yield. Biostimulant Asahi SL, however, caused increase in the grain yield, especially in the third year of spring wheat monoculture and after using manure.

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