• Water Balance Calculations, Water Use Efficiency, and Aboveground Net Production

      Lane, L. J.; Stone, J. J.; USDA-ARS, Tucson, Arizona 85705 (Arizona-Nevada Academy of Science, 1983-04-16)
      A discrete form of the water balance equation is used to illustrate the interaction among precipitation, runoff, percolation below the root zone, bare soil evaporation, plant transpiration, and plant available soil moisture. Under rangeland conditions, water availability is often the limiting factor in plant survival and growth. Therefore, the water balance equation is used, together with soils data and water use efficiency factors, to estimate annual aboveground net primary production of perennial vegetation.
    • Water Harvesting: An Alternative Use for Retired Farmlands

      Karpiscak, Martin M.; Foster, Kennith E.; Rawles, Leslie R.; Office of Arid Lands Studies, College of Agriculture, University of Arizona, Tucson, Arizona 85721 (Arizona-Nevada Academy of Science, 1983-04-16)