In virtually all advanced industrialized countries, the explosive topic of immigration has engendered heated argument, political anger, cultural anxieties, and blatant racism. In the United States, most of the attention is on the stream of Mexicans crossing the border in such numbers that early...

Maize-soybean strip intercropping has the advantages of alleviating the contradiction of arable land in China, improving the utilization rate of resources, high yield and sustainability. The key to exert these advantages is to stabilize the maize yield. However, interspecific interactions...