In:
Soil Science Society of America Journal, Wiley, Vol. 24, No. 5 ( 1960-09), p. 361-364
Kurzfassung:
Oats were grown in the greenhouse on 20 different soils which had been stored in a moist condition prior to potting. Available soil Mn was estimated by extraction with 1.5 M NH 4 H 2 PO 4 , 1.0 N H 3 PO 4 , and 0.1 N H 3 PO 4 on moist as well as air‐dried soil samples. Correlations with soil and plant Mn showed that extraction of soil Mn from the moist samples with 0.1 N H 3 PO 4 gave the highest correlation coefficient (0.848). Other extractants resulted in much lower correlation coefficients (0.311 to 0.694), regardless of the sample moisture condition. In a second greenhouse experiment, oats were grown on seven soils which had been stored under air‐dry as well as moist conditions. With one exception, the amount of Mn removed by the oats grown on the previously air‐dried soils was equal to or greater than the Mn removed from soils previously stored in a field moist condition. Chemical extraction of soil Mn from moist as well as air‐dried soils revealed that the release of Mn upon drying requires aerobic conditions and is not a simple dehydration phenomenon. Extractions of moist as well as air‐dried samples with 0.1 N H 3 PO 4 , 0.05 M NaEDTA of pH 9.5, and 0.2% hydroquinone were performed to estimate the weakly acid‐soluble, organic, and easily reducible oxides of soil Mn, respectively. The results indicated that the release of Mn upon air drying stemmed from the organic fraction of soil Mn. This release of organically complexed Mn is thought to be a result of chemical oxidation of soil organic matter.
Materialart:
Online-Ressource
ISSN:
0361-5995
,
1435-0661
DOI:
10.2136/sssaj1960.03615995002400050017x
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
1960
ZDB Id:
241415-6
ZDB Id:
2239747-4
ZDB Id:
196788-5
ZDB Id:
1481691-X
SSG:
13
SSG:
21
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