A STUDY ON THE CUTTING PARAMETERS OF A GENERAL CHAIN SAW Variation of CO2 concentration in solar greenhouse in Northern China AnevaluationoftheHargreavesmethodforestimatingreferenceevapotranspirationindifferentgrasslandtypesinInnerMongolia,China Changes of Photosynthetic Characteristics and Response to Rising CO2Concentration in Strawberry in Solar Greenhouse Changes of Photosynthetic Characteristics and Response to Rising CO2Concentration in Strawberry in Solar Greenhouse Research Progress of the Arginine Biosynthetic Pathway in Prokaryotic Cells Dynamic Analysis about Traits of Root and Soil of the Young Festuca arundinacea Turf Infested by Imperata koenigii Forage strategy of the Przewalski′s gazelle (Procapra przewalskii) under selenium stress Effects of outer type and built-in type straw bio-reactors on tomato growth and photosynthetic performance.