Effect of different wetting depth on root mass and water use in individual layers of maize rhizosphere
1999
Pejic, B. | Bosnjak, Dj. (Poljoprivredni fakultet, Novi Sad (Yugoslavia))
Three-year experiments have been conducted at the experimental field, on calcareous chernozem soil of the loess terrace. Three variants of sprinkling irrigation were applied, to permeate soil layers to the depths of 20, 40 and 60 cm. The control variant was left unirrigated. Irrigation was scheduled by calculating water balance by the bioclimatic method. In the irrigation variants, the soil layer 0-40 cm contained about 90% of the root mass, which took up 62.3% of the total amount of water used in the course of the season. It is therefore recommended to maintain optimum soil moisture in that soil layer. This depth should be taken as a basis when projecting and dimensioning the irrigation equipment for the center pivot and linear sprinkling irrigation.
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