Open access
Aug 2026
Effect of Soil Application of Humic Acid on Nitrogen Availability and Nitrifying Bacteria in the Rhizosphere of Sorghum (Sorghum bicolor L.)
Background: Humic acid improves soil fertility, nutrient availability and microbial activity. This study evaluated the effects of different humic acid levels on nitrogen availability and nitrifying bacteria in rhizosphere and outside of rhizosphere soils of sorghum. Methods: A pot experiment was conducted at the Colleg...
N. Abbas, Hajir Sajad Al-Assfar, Zainab Gatea Abed et al.
· Agricultural Science Digest... · 0 citations