Listar Química por autor "442c81cd-54b0-4480-84a9-05f450f3decf"
Mostrando ítems 1-3 de 3
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Estudios análiticos del azufre en algunos suelos de Costa Rica
Bornemisza Steiner, Elemer (1955) -
Organic Carbon Determination by the Walkley-Black and Dry Combustion Methods in SurfaceSoils and Andept Profiles from Costa Rica
Bornemisza Steiner, Elemer; Constenla Umaña, Manuel Arturo; Alvarado, A.; Ortega, J.; Vasquez, J. (1979-01)The efficiency of oxidation of organic C by the Walkley-Black method was studied by comparing with determinations using dry combustion equipment and gravimetric determination for the evolved CO2. Fifty surface soils (0-30 ... -
Residuos, degradación y comportamiento de la ametrina en un vertisol de Guanacaste. Costa Rica
León Dobles, Lorena; Constenla Umaña, Manuel Arturo; Bornemisza Steiner, Elemer (1978)Residues of the herbicide Ametrine (2-ethylamine-4-isopropylamine-6-methylthio-s-atrazine) were determined by UV-spectrometrical analysis in a soil (vertisol) of Guanacaste, Costa Rica, which has been treated with this ...