Rice straw biochar improves soil fertility, growth, and yield of rice–wheat system on a sandy loam soil

Biochar has received attention due to its potential for mitigating climate change through carbon sequestration in soil and improving soil quality and crop productivity. This study evaluated the effects of rice straw biochar (RSB) and rice husk ash (RHA) each applied at 5 Mg ha −1 and four N levels (0, 40, 80, and 120 kg ha −1 ) on soil fertility, growth, and yield of rice and wheat for three consecutive rice–wheat rotations. RSB significantly...