The Effect of Applying Mineral Fertilizers Through Drip Irrigation and Furrow Method on the Movement of Mobile Nutrients in the Soil and the Growth, Development, and Accumulation of Nutrients in the Walnut Leaves

Abstract

A task was set to reveal the effect of water-soluble fertilizers of new composition
and quality on the content of available nutrients at different depths of the soil,
depending on the movement of the irrigation water, irrigation time, as well as
its effect on the growth, yielding capacity and the quality of fruit in commercial
size walnut orchards. The research has shown that the movement of nutrients
in the soil is completely dependent on the movement of water when applying water-soluble complex fertilizers with drip irrigation. Therefore, the amount of the water should be adjusted so that the nutrients are available to the plant’s root system at all depths, improving the growth, and increasing the content of the basic nutrients in the leaves.Fertilizers with less water-solubility are mainly preserved at a 0 cm - 30 cm depth. When the root system grows and spreads to the inter-row spaces, it is appropriate to periodically fertilize also the inter-row spacing by the furrow method.