Dynamic change of dry matter accumulation and ralationship between artemisinin and nitrogen, phosphorus, potassium in Artomisia annua Effects of fertilization ratios of N, P, and K on yield and active ingredients of Angelica dahurica var. formosana from Sichuan Province Leaf nitrogen and phosphorus stoichiometry in 80 herbaceous plant species of Songnen grassland in Northeast China Effect of N, P, and K fertilizers on sclerotial formation and germination of southern blight of Coptis chinensis Phosphorus and Nitrogen Interactions in Field-Grown Soybean as Related to Genetic Attributes of Root Morphological and Nodular Traits Characteristics of phosphorus adsorption and desorption of soils from wetlands recovered from farmlands in Caizi Lake. Effects of nitrogen, phosphorus and silicon addition on leaf carbon, nitrogen, and phosphorus concentration of Elymus nutans of alpine meadow on Qinghai-Tibetan Plateau, China Effect of N, P, and K fertilizers on sclerotial formation and germination of southern blight of Coptis chinensis Effects of fertilization ratios of N, P, and K on yield and active ingredients of Angelica dahurica var. formosana from Sichuan Province Dynamic change of dry matter accumulation and ralationship between artemisinin and nitrogen, phosphorus, potassium in Artomisia annua