Shahzad , K , Khan , A , Richards , M & Smith , J U 2017 , ' The Impact of Treatment of Organic Manures on Future Soil Carbon Sequestration Under Different Tillage Systems in Pakistan ' , Pakistan Journal of Agricultural Sciences , vol. 54 , no. 2 , pp. 277-286 . https://doi.org/10.21162/PAKJAS/17.4486