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This article in SSSAJ

  1. Vol. 25 No. 2, p. 146-149
    Received: Apr 20, 1960
    Accepted: Dec 6, 1960

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Soil Moisture: Technique of Control and Relation to Tomato Growth for Different Soils1

  1. Glen A. Cannell and
  2. F. T. Bingham2



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.

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