Use of Methanol-Water Solutions for Freeze Protection of Tensiometers1
- C. W. Wendt,
- O. C. Wilke and
- L. L. New2
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.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
Copyright © . .