Olson, R..V. and Carlson, C.W. (1949) Iron chlorosis of sorghums and trees as related to extractable soil and iron manganese. Soil Science Society Proceeding, 14. pp. 109-112.
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Abstract
Soil samples were taken from areas where (1) Fe chlorosis was absent, (2) chlorosis of pinoak, spirea and pine occurred but that of sorghum was rare and (3) both trees and sorghum suffered from chlorosis, the soil factors contributing to chlorosis being presumably most marked in this group. Samples were analysed for (a) extractable Fe (in 4 parts of n. NH4 acetate + acetic acid at pH 4), (b) exchangeable and (c) easily reducible Mn, (d) pH and (e) CaCO3 content. The chlorosis was not restricted to calcareous soils and some non-chlorotic areas had pH above 7. Content of (a) was greatest in (1) and least in (3); (b) was greatest in (1), groups (2) and (3) resembling each other in this respect; (c) was similar in all groups. Ratios of (b) and (c) to Fe were greater in (3), the other groups resembling each other in this respect. Differences in Mn: Fe ratios seemed due mainly to differences in (a); (a) was always correlated with the observed field behaviour of all groups, whereas Mn content and Mn: Fe ratios were not. While the soil properties studied are related to Fe chlorosis, they cannot be used to predict definitely the occurrence of chlorosis; it seems that other factors determine whether or not chlorosis appears.
| Item Type: | Article |
|---|---|
| Author Affiliation: | Kansas Agricultural Experiment Station Manhattan. |
| Subjects: | Soil Science and Microbiology > Soil Sciences |
| Divisions: | Sorghum |
| Depositing User: | Library ICRISAT-InfoSAT |
| Date Deposited: | 12 Apr 2012 12:08 |
| Last Modified: | 12 Apr 2012 13:03 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/4689 |
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