The complexity of humic substances (HS) and their properties in agricultural applications have attracted the attention many researchers. However, controversial results been obtained, because difficulty identifying a precise relationship between structure activity these substances. This study aimed to evaluate influence different frequencies concentrations on behavior physical, chemical microbio...

Abstract Background The residual effects of biochar are yet to receive adequate research attention in Sub-Saharan Africa despite the assumption that positive effect may last longer on degraded tropical soil. Hence a field experiment was conducted assess biochar, farmyard compost and NPK fertilizer applications Ferralsol central Uganda. used for study previously conduct experiments two seasons c...

This study was aimed at quantifying soybean (Glycine max) nitrogen fixation under reduced tillage (RT) and conventional tillage (CT) in a tropical Ferralsol of the sub-humid zone of western Kenya, using the isotope N dilution method. Crop residue (CR) management was a superimposed treatment in soybean-maize rotation and intercropping systems. This study quantified N in abscised soybean leaves. ...