Mannan, MA, E Halder, MA Karim, and JU Ahmed. 2017. “Alleviation of Adverse Effect of Drought Stress on Soybean (Glycine Max. L.) by Using Poultry Litter Biochar”. Bangladesh Agronomy Journal 19 (2):61-69. https://doi.org/10.3329/baj.v19i2.31854.