A New Indicator for Global Food Security Assessment: Harvested Area Rather Than Cropland Area

• DOI: 10.1007/s11769-022-1264-6
• Publication Date: 2022-01-07T07:02:56Z
• Authors: Fengjiao Song; Shijie Wang; Xiaoyong Bai; Luhua Wu; Jinfeng Wang; Chaojun Li; Huan Chen; Xuling Luo; Huipeng Xi; Sirui Zhang; Guofeng Luo; Mengqi Yan; Qingqing Zhen
• Keywords: 01 natural sciences; 0105 earth and related environmental sciences

Cropland area has long been used as a key indicator of food security. However, grain yield is not solely controlled by the cropland. Therefore, we proposed new to assess Results show that from 1992 2004, global cropland increased 840 200 km2 (99.4%), but only 310 million t (29.1%); and 2004 2015, decreased 39 000 (4.64%), 370 (70.84%). This result showed was linearly correlated with area, delimiting threshold protection may guarantee Combined further correlation analysis, found increase in more closely related harvested (R2 = 0.94), which indicated scientific accurate than terms guaranteeing if governments want ensure security, they should choose indicator: rather area.