1. Composition and structure of humic substances in long-term fertilization experimental soils of southern China;Ahamadou;J. Environ. Manag.,2013
2. Use of coal derived humic acid as soil conditioner to improve soil physical properties and wheat yield;Ahmad;Int. J. Plant Soil Sci.,2015
3. Effect of humic acid on nutrient uptake and physiological characteristic Fragaria ananassa var: Camarosa;Ameri;J. Biol. Environ. Sci.,2012
4. Effects of lignite-derived humic acid on some selected soil properties, growth and nutrient uptake of wheat (Triticum aestivum L.) grown under greenhouse conditions;Arjumend;Pak. J. Bot.,2015
5. The influence of humic acids derived from earthworm-processed organic wastes on plant growth;Atiyeh;Bioresour. Technol.,2002