Use of Methanol-Water Solutions for Freeze Protection of Tensiometers
1978
Wendt, C. W. | Wilke, O. C. | New, L. L.
The use of tensiometers to schedule irrigations has teen limited primarily to summer crops because of water freezing in the tensiometers during the winter months. Since methanol-water mixtures have lower freezing points than water, a greenhouse study was conducted using an Olton loam soil (Acridic Paleustolls) to determine the effect of a methanol-water mixture (30% methanol by volume) on tensiometer readings and plant growth. No major effects of tensiometer readings or plant growth Mere noted. Results from a field demonstration on irrigated winter wheat (Triticum aestivum L.) indicate that tensiometers with such mixtures can be used to estimate soil water tension changes at atmospheric temperatures down to −18.8 C.
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