Investigation on fertigation of peach on three soils. III. Zones of salt accumulation
1999
Koumanov, K. | Stoilov, G. | Dochev, D. (Institute of Fruit Growing, BG-4004 Plovdiv (Bulgaria))
The experiment was carried out in lysimeters on three soils: alluvial-meadow soil (Fluvisol) - sandy loam, cinnamon-forest soil (Luvisol) - clay loam, and smolnitsa (Vertisol) - clay. The fertilizers - urea and phosphoric acid, were supplied through the irrigation system, the annual amounts being partitioned to monthly doses. The zones of salt accumulation coincided ( by location, shape, and size) with the areas of increased nitrate content. Based on a strong correlation, it was derived a regression equation which allowed the concentrations of nitrate nitrogen in non-saline soils to be determined from the soil electrical conductivity, independently on the soil type and with a satisfying for practical purposes exactness.
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