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Abstract The aim of the present inv~stigation is to conclude t he pr opez c ul t U.I al PI ac t ic ~s fOI the pr cduc t ion of cassava on sandy soils in respect of feIt ilizat ion and harvesting time in oz de r to maximize yield. The experiments were undertaken to achieve the goals of study ovex the two seasons 1988/89 and 1989/1990 in the experimental faIm of Faculty of AgIic., Sllez Canal Univ. at Iamailia. The split-plot design with foux replications was adopted; in which main plots were devoted fOI NPK feI~ilizeI tIeatments of 0-0-0, 45-0-0, 90-0-0, 45-)0-0, 90-)0-0, 45-JO-50 and 90-)0-50. The sub plots wexe devoted fox two haIvesting times at 9 and 11 months fIom planting. |