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Soil Moisture: Technique of Control and Relation to Tomato Growth for Different Soils
Author(s) -
Cannell Glen A.,
Bingham F. T.
Publication year - 1961
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1961.03615995002500020023x
Subject(s) - soil water , irrigation , greenhouse , water content , fertilizer , environmental science , moisture , gypsum , suction , agronomy , dry matter , soil science , chemistry , materials science , geology , biology , geotechnical engineering , mechanical engineering , engineering , organic chemistry , metallurgy
A method is given for soil moisture control in greenhouse pot studies using tomato plants. Tensiometers and cylindrical electrode type gypsum blocks were used for timing of irrigation. Through use of calibration curves which related volume of water loss to suction under plant growth the quantity of water to be added at each irrigation was also determined from instrument readings. Dry weight yields (plants grown to fruiting stage) increased with decreasing soil suction and with increasing fertilizer levels. By use of ratios of unit dry matter produced to unit water used, it was shown statistically that plant growth was affected by soil suction. The ratios were increased with increasing soil suction and with increasing fertilizer levels.