It is key strategy to close grain yield gap while improve resources use efficiency for sustainable development of China. However, how to promote the technology application in large scale small farming systems has been a common challenge for both the governments and scientists. The Center for Resources, Environment and Food Security (CREFS) of China Agricultural University initiated the Science and Technology Backyard (STB) at Quzhou County, Hebei Province and Lishu County, Jilin Province in 2008 and 2009 re...