Study on the Effects of Exogenous Organic Materials on Nitrogen Fractions in Acidic Black Soil
Soil acidification threatens N availability, but the effects of maize straw and biochar on organic N fractions in acidic black soil are unclear. We examined the effects of straw (1.5%, 3%) and biochar (1%, 2%) with fertilizer on soil acidity, N fractions, and enzyme activities in a pot experiment with soybean. All amen...