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Water Relations of Fritted Clay¹

ABSTRACT

Experiments and calculations were performed to characterize the water relations of fritted clay, a material which has been found suitable for growing experimental plants. Its dry bulk density is 0.67 kg/liter, particle density 2.50 kg/liter, total porosity 0.73, and saturated hydraulic conductivity 9.5 x 10^–4 m/sec. The desorption relation was measured and the unsaturated hydraulic conductivity as a function of water content was calculated. Much water drains from the saturated material by gravity. After drainage from commonly used containers, the material holds 0.31 by volume of plant-available water, and has an air-filled porosity of 0.28. Its water relations are excellent for plant growth purposes.

¹ Contribution from Texas A&M University, College Station, TX 77843

² Professor, Instructor, and Graduate Student, Dept. of Soil and Crop Sciences, Texas Agric. Expt. Stn., Texas A&M Univ., College Station, Texas, respectively.

Received for publication August 15, 1977. Accepted for publication March 7, 1978.

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