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| Authors: | S.O. El-Abd, S.M. Singer, Y.I. Helmy, M.S. El-Beltagy |
| Keywords: | Fertilization, sandy soil, calcareous soil, Solanum tuberosum, yield |
Abstract:
The experiments were conducted during two successive seasons to investigate the effect of the nutrient rates under the newly reclaimed lands in two different (calcareous and sandy soils) sites.
Salany variety was grown in summer season of 1998-1999. Chemical analyses of N, P, K and Ca of leaves for all treatments were performed.
Plant growth parameters such as fresh and dry weight for aerial parts, number and weight of tubers were recorded after 60 and 90 days from planting.
Where plant height and stem number were measured till 60 days after planting.
Potato yield was measured by the end of growing season (120 days after planting). The results obtained showed that plant height, stem number and total carbohydrate content of tubers were not significantly different among treatments.
The highest fresh weight of aerial parts was recorded at the highest level of nutrient application in both sites.
The dry weight obtained of aerial parts was significantly different under some application levels.
It can be concluded that N, P and K rates, necessary to obtain the highest yield were 280, 125 and 100 units, respectively, for sandy soil, while those for calcareous soil were 230, 125 and 175 units, respectively.
It is clear that sandy soil needs more nitrogen while calcareous soil needs more potassium to obtain high yields.
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