ISHS Acta Horticulturae 301: IV International Symposium on Processing Tomatoes
PERCOLATION LOST OF MACRONUTRIENTS IN PROCESSING TOMATOES CULTIVATED IN SANDY SOILS |
| Authors: | A.M. Calado, A.G. Ferreira, C.M. Portas, M.L.P. da Silva |
| Abstract:
Surface drip irrigation is defined as the uniform application of small quantities of water at frequent intervals on the soil surface from discrete emission points or line sources. During three years (1988–1990) we operate with a surface drip irrigation system in a sandy soil. Irrigation was performed and tested with automatic monitoring with electric tensiometers and electric clocks in order to establish the effects of water rate, scheduling of irrigations in yield and lost of nutrients per percolation at several soil-water potentials (-10, -20, -40 and -60 KPa). The results showed (1) a considerable mobility of all macronutrients (2) and the best performance for irrigation treatment M2 (-20 KPa) both to yield and macronutrients lost. | |
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