Summary
This field study conducted on Pellic Vertisol, was designed to investigate the response of trickle-irrigated tomato (Lycopersicon esculentum Mill.) to four nitrogen levels continually applied with the irrigation stream. Waters containing 80, 130, 180, or 230 mg N/1, and uniformly supplied with 60 and 150 mg/l of P and K, respectively, were applied four times a week.
The resulting N application totals ranged from 472 to 1457 kg N/ha. The total amount of water applied was 590 mm. Appreciable buildup of soil NO3−N occurred below 75 cm depth with the highest amount of N, but not with 80 or 130 mg N/l. Soil salinization was similar in all treatments with a mean ECe throughout the profile of 2.7 dS/m. The highest yield (177 tons/ha) was obtained with 180 mg N/1 (1062 kg N/ha).
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Papadopoulos, I. Constant feeding of field-grown tomatoes irrigated with sulphate water. Plant Soil 88, 231–236 (1985). https://doi.org/10.1007/BF02182449
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DOI: https://doi.org/10.1007/BF02182449