Unreliabilities of Pressure Plate 1500 Kilopascal Data in Predicting Soil Water Contents at Which Plants Become Wilted in Soil-Peat Mixes

Stevenson, D.S.

Canadian Journal of Soil Science 62(2): 415-419


ISSN/ISBN: 0008-4271
DOI: 10.4141/cjss82-045
Accession: 068495017

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The 1500-k Pa pressure plate extraction procedure for estimating the wilting percentage was an unreliable predictor of water remaining in soil-peat mixes when plants wilted. Quantities of water remaining in the mixes when corn and sunflowers wilted increased as the percentage of peat increased reaching more than 1/3 of the volume of the medium in some of the mixes and in pure peat.