Assessment of the overall arrangement of urban modern agriculture industry in Beijing using location quotient technique Patterns of urban circular agriculture based on agricultural industries — A case study of Fangshan District of Beijing City Utilization of biodiversity in agriculture: today and tomorrow Agricultural production in Hani Rice Terraces System and related threats- A case study of Zuofu and Mitian Villages in Honghe County, China An outlook on modern ecological agriculture in Shandong Province