Effects of biochar and sewage sludge on spinach (Spinacia oleracea L.) yield and soil NO3- content in texturally different soils in Glen Valley, Botswana
Ugele Majaule
Ugele Majaule
Department of Environmental Science, University of Botswana, Private Bag UB 0704, Gaborone, Botswana.
Martin Luther University Halle-Wittenberg, Institute of Agronomy and Nutritional Sciences, Soil Biogeochemistry, von-Seckendorff-Platz 3, 06120, Halle/Saale, Germany.