Extraction of Potassium from Soils with Sodium Tetraphenylboron
- 1 January 1965
- journal article
- Published by Wiley in Soil Science Society of America Journal
- Vol. 29 (1), 33-35
- https://doi.org/10.2136/sssaj1965.03615995002900010012x
Abstract
The amounts of K extracted from several soils of different K supplying power with solutions containing NaTPB were compared with the amounts taken up by intensive greenhouse cropping and with the amounts extracted with 1N NH4OAc (exchangeable K). The best estimate of plant available K was the amount of K extracted from 2‐g samples of nondried soil with 10 ml of 0.3N NaTPB in 15 min (r = 0.991). The decrease in the amount of K extracted by the same reagent in 16 hours, as a result of cropping, likewise was closely correlated with available K (r = 0.984). Exchangeable K determined in nondried soil samples was more closely correlated with available K (r = 0.971) than was exchangeable K determined in dried soil samples (r = 0.788).Keywords
Funding Information
- Wisconsin Alumni Research Foundation