This study was carried out on th growth of grape and soil fertility of upper and lower parts in both naked and sod mulched areas as influenced by various slopes of vineyard in order to make more efficient use the sloping area.
In 1968, the soil culture of one year old grape seedlings (variety Campbell Early) was conducted under the natural condition and following results was obtained.
The P₂O_5, K and Ca contents in the soil was generally more promoted in lower parts than in upper parts of slope area, where as in the case of MgO this tendency was reversed.
The content of inorganic composition in the tree was variable according to the slope.
The soil composition before the culture of fruit tree is uniform, in general, with higher content of inorganic matter than in the soil after the culture. The soil fertility after the culture was proved generally higher in sod mulching plots than in the naked plots.
The linear growth of the trees and the dry weight of leaves was generally more promoted in the conterolthan in sod mulching, in lower parts than in upper parts and those was observed to become lower and slighter as the slope was steeper.
The inorganic matter in the leaves seem to have a tendency to increase in the leaves in the lower parts than in upper parts of the tree grown on slope area while on the other in the case of MgO this tendency was opposited.
The soil lost and the inorganic contents of soil lost was observed to become higher as the slope was steeper, especially it was much higher in the naked soil than that in the sod mulch area.
The run-off was less in the naked soil as the slope was steeper, while it was reversed in the sod mulch plot.
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