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M. Ĉerne (1990)
DIFFERENT KINDS AND LEVELS OF NITROGEN NUTRITION IN TOMATOES
Doss Doss, Evans Evans, Johnson Johnson (1975)
Rates of nitrogen and irrigation for tomatoesJ. Amer. Soc. Hort. Sci., 100
El‐Khattari El‐Khattari, Kharabsheh Kharabsheh (1982)
Transformation of urea and ammonium sulfate in some Jordan soilsDirasat, 2
Glen Glen, Asbell Asbell (1967)
Irrigation of field tomatoes and measurements of soil water changes by neutron moderation methodJ. Amer. Soc. Hort. Sci., 99
U. Kafkafi, B. Bar-yosef (1980)
Trickle Irrigation and Fertilization of Tomatoes in Highly Calcareous Soils1Agronomy Journal, 72
Battikhi Battikhi, Judah Judah, Suwwan Suwwan (1985)
Irrigation scheduling of tomatoes grown under drip‐irrigation inside plastic greenhouses in the Jordan ValleyDirasat, 6
G. Varga (1988)
THE EFFECT OF IRRIGATION ON THE QUALITY OF PROCESSING TOMATOES
Tomato (Lycopersicon esculentum mill. cv. Petopride) is the most important vegetable crop in Jordan; its production is characterized by inadequate irrigation and fertilization practices, especially under open field conditions. A field study was carried out to determine the effect of different irrigation intervals and different N‐fertilizer doses on water use, tomato yields and residual soil nitrogen. Results indicated significant differences in water use and tomato yields between irrigation treatments. Highest yield (51.4 ton ha−1) was obtained under three irrigations per week with 504 mm total water supply, whereas under irrigation once a week 35.3 ton ha−1were produced with 353 mm total water supply. There were no significant differences in yield between fertigation with ten equal time intervals and fertigations with intervals as per crop requirements, the yields were 47.1 ton ha−1 and 44.5 ton ha−1, respectively. However, yield was significantly lower with three fertigations at equal intervals and equal doses (35.8 ton ha−1) throughout the season. There were no significant differences between mineral nitrogen forms in terms of yield effects. Significant irrigation effects were observed on total soil nitrogen. Residual soil N was 0.052% in the surface layer (0–30 cm), and 0.030% in the subsurface layer (30–60 cm).
Journal of Agronomy and Crop Science – Wiley
Published: Aug 1, 1997
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