Journal Article 944 Research Support, Non-U.S. Gov't 244 yield 132 Plant Proteins 94 Review 94 Yield 84 grain yield 57 mehr ... Water 53 059QF0KO0R 52 Nitrogen 52 N762921K75 50 Soil 50 Subject Areas 43 Yield loss and economic impacts 43 yield loss 42 wheat 41 rice 40 Causal Agent 39 crop yield 39 Crop Type 38 photosynthesis 38 Grain yield 37 142M471B3J 36 Carbon Dioxide 36 7440-44-0 34 Carbon 34 Methane 34 OP0UW79H66 34 1406-65-1 33 Chlorophyll 33 weniger ...