Assessment framework and method of agricultural system resilience to drought——A case study of Xingtai City, Hebei Province Structural attribute and optimization of farmland and non-cropped green-land patches of agricultural landscape: A case study of Fengqiu County, Henan Province Production state and yield potential of wheat and maize in low-medium yield farmlands in Hebei Plain Using vegetation net primary productivity to determine theoretical and achievable farmland productivity Distribution characteristics of organic carbon and total nitrogen in dry farmland soil aggregates under different tillage methods in the Loess Plateau of central Gansu Province Ecological Functions of Diversified Farmland landscape Farmland nutrient balance of nitrogen, phosphorus and potassium in Gansu Evaluation on comprehensive ecological benefits of different hedgerow patterns on slope-farmland in purple soil area Ecologically oriented spatial configuration of basic farmlands in Lulong County, Hebei Province Effects of returning wheat straw to farmland and irrigation pattern on grain setting traits and quality of super rice Vertical infiltration characteristics of reclaimed farmland soils with Yellow River sediment fill