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Flower Structure and Reproduction System of Forsythia suspensa Vahl Studies on the Inheritance of "Ch-"Dominant Nucleus Sterility of Millet (Setaria italica) and Its Application to Commercial Production A study on assessment and improvement for agricultural production systems of households in cropping and pasturalism transition zone in North China The effects of climate change on dryland wheat production under different tillage systems An analysis on agro-grassland farming systems in subtropical mountainous areas:A case study in Qinglong County, Guizhou Province Anaerobic biodegradation of phthalic acid esters (PAEs) in municipal sludge. A Study on the Efficient Forage Production System in the Cropping Areas of Southwestern Sichuan Province Possibility and Tentative Design for the Establishment of Tri-elements Structure in the Agricultural System in China Spatial characteristics of phosphorus flow in crop-livestock production systems in Shanxi, China Nitrogen flows in"crop -edible mushroom"production systems in Hexi Corridor Oasis Irrigation Area Nitrogen flows in intensive "crop-livestock" production systems typically for the peri-urban area of Beijing Relational discussion on agricultural productivity and agricultural systems structure Effect of different crop successions on main disease development in cucumber under sunlit greenhouse Reproduction Systems of Two Cultivated "Zangyinchen"