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A Rapid Method to Estimate Potentially Mineralizable Nitrogen in Soil

^a Fac. de Ciencias Agrarias, Univ. Nac. de Mar del Plata (UNMP)- Est. Exp. Agropecuaria Balcarce, Inst. Nac. de Tecnología Agropecuaria (INTA), Unidad Integrada Balcarce, C.C. 276, (7620) Balcarce, Argentina
^b Dep. of Crop and Soil Sciences, Univ. of Georgia, Athens, GA 30602
^c USDA-ARS. J. Phil Campbell Sr. Natural Resource Conservation Center, 1420 Experiment Station Road, Watkinsville, GA 30677

View larger version (23K): [in a new window]   Fig. 1. Diagram showing arrangement of rubber septum with tube containing reagent installed at the mouth of a 120-mL serum bottle.

View larger version (16K): [in a new window]   Fig. 2. Effect of reaction time on pressure developed by the Ca(ClO)2 method (mean and standard deviation).

View larger version (19K): [in a new window]   Fig. 3. Effect of soil/reagent (g/g) and soil/water (g/mL) ratios on the pressure developed by the Ca(ClO)2 method (mean and standard deviation).

View larger version (21K): [in a new window]   Fig. 4. Relationship between total gas and total CO2 generated by the Ca(ClO)2 method.