Saha, R., Saieed, M., Chowdhury, M. and Chowdhury, M. (2014) “Influence of humic acid and poultry manure on nutrient content and their uptake by T. aman rice”, Journal of the Bangladesh Agricultural University, 12(1), pp. 19–24. doi: 10.3329/jbau.v12i1.21234.