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- W1977827095 abstract "1. A proximate method is described for the extraction and assay of auxin in soils. One hundred gm. of soil is shaken at intervals for 48 hours with sufficient limewater to keep the pH between 7 and 8 in a volume of 400 cc. The filtered extract is then concentrated and auxin measured by the standard Avena test. 2. Auxin determinations were made on the two upper horizons of eleven virgin soils representative of four of the great soil groups. In very fertile midwestern surface soils and subsoils auxin was found to the extent of about 0.175 micrograms per kilogram of soil (indoleacetic acid equivalents). In less fertile soils considerably less auxin was found in the surface horizons and little if any in the second horizon." @default.
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- W1977827095 date "1942-03-01" @default.
- W1977827095 modified "2023-10-14" @default.
- W1977827095 title "Auxins in Some American Soils" @default.
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- W1977827095 doi "https://doi.org/10.1086/335070" @default.
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