David A. Wedin and David Tilman (Reports, 6 Dec.,p 1720) show that increased nitrogen inputs to terrestrial ecosystems might cause smaller increases in the capacity of those ecosystems to store carbon than expected. Their findings are important because nitrogen inputs have increased dramatically over the past decades through fertilizer production, […]
Evidence is mounting that extinctions are altering key processes important to the productivity and sustainability of Earth’s ecosystems1, 2, 3, 4. Further species loss will accelerate change in ecosystem processes5, 6, 7, 8, but it is unclear how these effects compare to the direct effects of other forms of environmental […]
One of the primary challenges of our time is to feed a growing and more demanding world population with reduced external inputs and minimal environmental impacts, all under more variable and extreme climate conditions in the future1, 2, 3, 4. Conservation agriculture represents a set of three crop management principles […]