1. Agro‐Meteorology Division National Institute for Agro‐Environmental Sciences 3‐1‐3 Kannondai Tsukuba Ibaraki 305‐8604 Japan
2. Instituto de Clima y Agua Instituto Nacional de Tecnologia Agropecuaria Hurlingham Argentina
3. Department of the Geographical Network of Field Experiments All‐Russia Institute for Agrochemistry Moscow Russia
4. Department of Earth and Planetary Science Graduate School of Science, The University of Tokyo Tokyo Japan
5. Institute for Soil, Climate and Water Agricultural Research Council Pretoria South Africa
6. Development Research Division Japan International Research Center for Agricultural Science Tsukuba Japan