Summary
Field research was conducted for two years to evaluate the effect of corn straw biochar on soil chemical properties and microbial biomass of Chernozemic soil in Northern Province, China. The research set up was randomized complete block design with three replicates. A one-time application of biochar was done with the use of ploughing machine to a depth of 20 cm in the first year without further application in the second year. Each treatment plot size was 25 m2. Biochar (BC) was applied at three doses: control (BC0), 15 (BC15), and 30 (BC30) t ha−1. The doses of biochar significantly increased soil organic carbon (SOC), soil pH, the available nitrogen (AN), phosphorus (AP), and potassium (AK) as compared to the plots with no biochar additions (control) in 0-15 and 15-30 cm soil depth. Bioc
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