Effects of biochar and sewage sludge on spinach (Spinacia oleracea L.) yield and soil NO3- content in texturally different soils in Glen Valley, Botswana
Abstract:1 sewage sludge are recommended for spinach production on the Luvisol and Cambisol, respectively. In subsequent seasons, crop productivity could be maintained by application of mineral N in order to mitigate over-application of P.
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