2.1.2 The dry matter content in potato tubers

The dry matter content in potato tubers was significantly differentiated by the intercrop fertilization, straw fertilization and their interaction (table 4). The highest concentration of

dry matter characterized potato tubers fertilized with white clover, a mixture of white clover with Italian ryegrass and phacelia both plowed down in the autumn, as left till spring in the form of mulch.

The dry matter content in potato tubers fertilized with Italian ryegrass was significantly lower than in potatoes fertilized with farmyard manure. On control object, without organic fertilization dry matter content in potato tubers was significantly lower. Straw fertilization also significantly modified dry matter content in potato tubers. At the sub-block with straw potatoes distinguished by a higher concentration of dry matter than the tubers at sub-block without straw. From the interaction of researched factors showed that the highest content of dry matter was noted in potato tubers fertilized with white clover with straw, a mixture of white clover with Italian ryegrass in combinations without straw and with straw, phacelia in combination with straw, and phacelia used in the form of mulch with a straw or without the straw, and the lowest in potato tubers harvested from control object without organic fertilization.