A PRELIMINARY STUDY ON THE WATER EQUILIBRIUM AND EVAPOTRANSPIRATION IN PLANTATION OF PINUS TABULAEFORMIS Measurement of evapo-transpiration and crop coefficient of irrigated spring wheat in Naiman sandy cropland Effect of Soil Moisture Content on the Evapo-transpiration(ET)and Growth of Turfgrass Study on Evapo-transpiration on Agroforestry