Ran Huang^1,2, Jianxi Huang², Chao Zhang², Yingyi Chen³, Hongyuan MA², Wen Zhuo², Dehai Zhu², Qingling Wu⁴ and Lamin R. Mansaray⁵, (1)Hangzhou Dianzi University, Hangzhou, China, (2)China Agricultural University, College of Land Science and Technology, Beijing, China, (3)China Agricultural University, College of Information & Electrical Engineering, Beijing, China, (4)University College London, Department of Geography, London, United Kingdom, (5)Sierra Leone Agricultural Research Institute (SLARI), Tower Hill, Sierra Leone