NUTRITION AND IRRIGATION OF TOMATO

Two years trials were conducted in the Mediterranean climate conditions where the soil is poor with organic matter and its mineralization is very rapid. Fertilization with different quantities of stable manure (0, 40 t/ha) and potassium (0, 200, 400 kg/ha) on irrigated and nonirrigated plots were studied. On irrigated plots the yield of tomato was 12 % higher in the first and 22 % higher in the second year than on nonirrigated plots. At lower rate of potassium the stable manure increased the yield for 15 % in the first year and for 9 % in the second year in comparison with the treatment without stable manure. At higher rate of potassium and stable manure the yield was increased for 24 % in the first and for 2 % in the second year in comparison with the treatment without stable manure. On plots without stable manure higher rate of potassium increased the yield for 2 % in the first and 14 % in the second year if compared to the lower rate of potassium. On plots with stable manure the higher rate of potassium Increased the yield for 9 % in the first and for 7 % in the second year In comparison with the lower rate of potassium.