Effect of cultivars and harvesting dates on the productivity and roots quality of sweet potato under sandy soil conditions and drip irrigation system [electronic resource].

Includes references.

This work was carried out during the two summer seasons of 2003and 2004 at EI-Khattara Experimental Farm, Fac. Agric., Zagazig University, to study the effect of cultivars and harvesting dates on plant growth, chcmical composition , yield and tuber root quality of sweet potato under sandy soil conditions and drip irrigation system. Abise cv. recorded maximum values of number of branches and leaves! plant, dry weight of branches ,leaves and dry weight of vine I plant, chlorophyll b, total chlorophyll (a+b) and carotenoides, average tuber root, N contents in leaves total carbohydrates, sugars and N and K contents in roots, whereas Beauregard cv. recorded maximum values of P content in branches, number of roots! plant, yield! plant, marketable and total yield/fed, carotene, DM (%) and P in roots.

Summary in Arabic.

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