Journal Article 7440-44-0 Carbon Soil Research Support, Non-U.S. Gov't food security soil organic carbon wheat 1.5°C warming 142M471B3J Carbon Dioxide Grain Proteins Multi-model ensemble N762921K75 Nitrogen Organic Chemicals Research Support, U.S. Gov't, Non-P.H.S. carbon age carbon input carbon sequestration climate change climate change adaptation climate change impact decomposition deep soil depth dependency extreme low yields grain protein interactive effect model ensemble