PLANNET

There is growing international awareness of the two main problems associated with N in agriculture and the need to coordinate funding and research to solve these problems at an international level. The Plant Nitrogen Network (PlaNNet) is a Research Coordination Network funded by the US National Science Foundation that aims to connect N-researchers around the world in order to coordinate efforts to solve the dual problems of N in agriculture... Nitrogen (N) is an essential element for plant growth and production of food, forage, fiber, and fuel. Low N-concentration in natural soils limits plant productivity. Industrial/synthetic N-fertilizers have removed the N-limitation in many agricultural systems, which was one of the drivers of the Green Revolution in agriculture during the 20 th century. However, over-use of N-fertilizers threatens the environment and human health and, therefore, the sustainability of high-N agricultural systems. On the other hand, millions of resource-poor..