INCREASING PRODUCTIVITY OF SNAP BEAN AND POTATO PLANTS UNDER SANDY SOIL CONDITIONS BY DELTA MIXTM

Abstract

Using chemical fertilization .causes economic losses and environmental pollution under sandy soil conditions. Several attempts to use organic' matter and natural ingredients in Egypt to reduce the use of chemical nutrients were reported Field experiments were carried out during two successive autumn seasons (J997 and 1998) at the experimental station of EI-Bossily Behaira Governorate, Egypt, in order to study the effect of the application of Delta mixTM natural ingredients (0, 150, 300 kg/fed) with organic matter (IO and 20 m3lfed.) and NPK (50 and 100% of the recommended dose) fertilization on the growth and yield of snap beans (Phaseolus vulgaris L.) and potato (Solanum tuberosum) plants under sandy soil conditions .Data showed that the highest snap bean vegetative growth and yield were obtained by using the highest levels of Delta mix(150,300) combined with the highest levels of organic matter(20 ml) fed.) and NPK (100%). The lowest results were obtained when the organic matter and NPK were used without Delta mixTM. Similar results were obtained with potato plants. The highest vegetative growth and the best tuberization were obtained using the highest rates of Delta mix, ™ combined with organic matter and NPK, while using the organic matter and NPK without Delta mix did not give the same results. On the other hand, there was no effect for the different rates of Delta mixTM concerning the chemical composition of potato tubers. It Can be concluded that using Delta mixTM produced vigorous plants and better Delta mixTM and better growth with higher quality of pods and tubers. Also using Delta mixTM can compensate