Performance of three soybean varieties under different population densities in sandy soils [electronic resource].

Includes references.

Two field experiments were conducted during 2001 and 2002 seasons in the Agricultural Farm of Suez Canal University at Ismailia to study the effect of two planting distanccs between hills i.e. 10 and 15 cm and three numbers of plants per bill, namely two, three and four plants per hill on yield, its components and yield quality of three soybean varieties, Giza21, Giza82 and DR101. The results showed tlmt Giza21 variety significantly surpassed the other varieties in plant height, number and weight of pods and seeds /plant, 100-seed weight and seed, straw and biological yields per fad as well as seed oil and protein yields/fad. Giza82 variety recorded the highest seed oil and protein percentages. Increasing plant population dcnsity through decreasing planUog,dislance from 15 to 10 cm and/or increasing number of plaals per hill from two to three and four plants consislenUy and signilicanUy increased plant beigbt, seed pJOtein percentage and seed, straw and biological yields/fad as well as seed oil and prolein yields/fad. The reverse was lrue regarding the yield attributes; number of branches, pods and seeds/plant, weight of pods and seeds/plant and 100-seed weight as well as seed oil percentage where the highest values were recorded with the lowest plant density, achieved by sowing in hills spaced 15 cm apart and/or leaving two plants per hill. However, the highest seed yield per fad was obtained by sowing four plants of Giza21 variety in hills spaced 10 cm apart.

Summary in Arabic.

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