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- [8] Comparison of Two Methods for Determination of Soil Fixed AmmoniumCOMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS, 2013, 44 (14) : 2077 - 2094Li, S. X.Tian, X. H.Wang, Z. H.
- [9] Adaptation and Validation of Colorimetric Methods in Determining Ammonium and Nitrate on Tropical SoilsCOMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS, 2016, 47 (22) : 2547 - 2557Schmiedt Sattolo, Thales MeinlOtto, RafaelMariano, EduardoKamogawa, Marcos Yassuo