“…The effects of such variability threaten food security and the contribution of agricultural sector to the national economy. Significant variations in rainfall, temperature, solar radiation and atmospheric gases would have impact on productivity and land use patterns (Ahmed, Al-Amin, Mohamad, & Chenayah, 2016;Siwar, Idris, Yasar, & Morshed, 2014;Tawang, Ahmad, & Abdullahi, 2001;Vaghefi et al, 2016). Moreover, the impacts vary across geographical locations because of high variation in elements of weather and climate, especially rainfall, even among relatively close locations (Alam, Siwar, Talib, & Toriman, 2014).…”