1. College of Engineering Nanjing Agricultural Univ. Key Laboratory of Intelligent Agricultural Equipment of Jiangsu Province Nanjing 210031 China
2. School of Arts and Design Huizhou Univ. Huizhou 516007 China
3. College of Agricultural Engineering Jiangsu Univ. Zhenjiang 212013 China
4. International Maize and Wheat Improvement Center (CIMMYT) Southern Africa Regional Office, 12.5 KM Peg, Mazowe Road Mount Pleasant Harare Zimbabwe