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Influence of Environment on the Vegetative Growth of Plants Watered at Various Soil Moisture Suctions¹

Synopsis: At high suctions there was greater reduction in vegetative plant growth when the environment caused high evapotranspiration than when the evapotranspiration was low. Transpiration diminished as soil moisture suction increased, regardless of environment, but, under conditions of high evapotranspiration, the reduction in transpiration was relatively greater. Regardless of environment, less water was used per unit dry weight produced when watering was delayed until higher suctions.

² Assistant Professor of Soil Physics and Laboratory Technician.

Received for publication April 16, 1960.