J. Agric. Food Chem. 2003, 51, 4321−4330
4321
Biogeochemical Assessment of Resilient Humus Formations from Virgin and Cultivated Northern Botswana Soils GONZALO ALMENDROS,*,† DONALD KGATHI,§ MOGODISHENG SEKHWELA,§ MARIÄA-CRISTINA ZANCADA,† PILAR TINOCO,† AND MARIÄA-TERESA PARDO† Centro de Ciencias Medioambientales (CSIC), Serrano 115 B, 28006 Madrid, Spain, and Harry Oppenheimer Okavango Research Centre, University of Botswana, Private Bag 285, Maun, Botswana
Humic matter in virgin and cultivated Vertisols and Arenosols from Pandamatenga (northern Botswana) has been studied by chemical fractionation and visible and infrared derivative spectroscopies. The in vitro soil respiration was also determined. Soils contained
