ICAR Research Data Repository for Knowledge Management
Measurement of exchangeable NH4+ in tropical rice soils
OAR@ICRISAT
View Archive Info| Field | Value | |
| Relation |
http://oar.icrisat.org/4008/
http://dx.doi.org/10.2136/sssaj1978.03615995004200020015x |
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| Title |
Measurement of exchangeable NH4+ in tropical rice soils
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| Creator |
Sahrawat, K L
Ponnamperuma, F N |
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| Subject |
Soil Science
Fertilizer Appications |
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| Description |
Measurement of exchangeable NH4+ by two methods - steam distillation of the filtrates of KCl extracts and of soil-KCl suspensions with MgO - was compared for 17 tropical soils covering a wide range in texture, pH, and organic matter. Distillation of soil suspensions gave significantly higher values for NH4+ both for aerobic and anaerobic soils, but the differences were much greater in the anaerobic soils. The higher values obtained by direct distillation of KCl-soil suspensions were probably due to hydrolysis of soil organic matter at the high pH values (9.9 to 10.7) brought about by the boiling MgO suspensions. The use of a filtered KCl extract instead of a soil suspension to measure exchangeable NH4+ in tropical rice soils is recommended
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| Publisher |
Soil Science Society of America
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| Date |
1978
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Language |
en
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| Rights |
—
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| Identifier |
http://oar.icrisat.org/4008/1/sssaj-42-2-282-283_1978.pdf
Sahrawat, K L and Ponnamperuma, F N (1978) Measurement of exchangeable NH4+ in tropical rice soils. Soil Science Society of America Journal, 42 (2). pp. 282-283. ISSN 0361-5995 |
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