Crops and soils Soil science 2 Crop yields 1 Crops 1 Crops and climate 1 Decision making 1 Field Crops, (New March 2000) 1 Land use, Rural 1 Mathematics and Statistics 1 Plant Cropping Systems 1 Plant-soil relations 1 Simulation models 1 Soil 1 Soil Science (General) 1 Soil management 1 Soils 1 Technology transfer 1 Tropical crops 1 Tropics 1