The objective of the investigations carried out in the years 2002-2005 was to assess the influence of stubble catch crops on yielding of potato. The following combinations of stubble catch crop fertilization applied: control object (without stubble catch crop fertilization), farmyard manure, white mustard, white mustard-mulch, phacelia, phacelia-mulch. Table potatoes were cultivated in the first year after applying the intercrop. During harvest the total yield of fresh mass of tubers was assessed, and after harvest the structure of tuber yield was determined. The results showed that stubble catch crops, compared with farmyard manure, introduced into the soil significantly smaller amount of dry matter and macroelements. The weather conditions in the period of the study significantly influenced the potato yield. The highest yield of tubers was obtained in the combination in which fertilization with phacelia plowed down the previous autumn was applied. Stubble catch crops, with the exception of white mustard left in the form of mulch till spring can completely substitute for farmyard manure fertilization.
