Effects of shading and light recovery on soybean morphology and photosynthetic characteristics in soybean-maize intercropping system Effects of alternative irrigation on eco-physiological characteristics of wheat/faba-bean intercropping Differences in maize photosynthetic characteristics and nitrogen regulation effects in maize/soybean and maize/sweet potato relay strip intercropping Effect of planting patterns on crop yield, nutrients uptake and interspecific competition in maize-soybean relay strip intercropping system Effects of fertilization methods on border effect of cereal-vegetablestrip intercropping system