Studies were conducted in years 2001-2004 at the Agricultural Experimental Station in Zawady, which is part of the Siedlce University of Natural Sciences and Humanities. The objective of the work was to analyse the effect of some characteristics of spring wheat grown in monoculture on its yield, interrupted with stubble crop growth. The effect of yield components on spring wheat yield was evaluated using the method of path analysis. It was found that, in monoculture, the yield of spring wheat grown after mustard was determined mainly by spike length, number of spikelets in the spike, mass of 1000 grains, and spike density per 1 m². The yield of spring wheat grown after phacelia was the most strongly determined by the mass of 1000 grains, number of grains per spike, and spike density per 1 m².

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