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Estimation of Nitrate Leaching in an Entisol under Optimum Citrus Production

^a Center for Marine, Environmental Sciences and Biotechnology Research, Drew Griffith Hall, Savannah State Univ., Savannah, GA 31404
^b USDA-ARS-PWA, 24106 North Bunn Road, Prosser, WA 99350
^c Sentek Pty Ltd, 77 Magill Road, Stepney, South Australia, 5069 Australia
^d CMESBR, Savannah State University, Savannah, GA 31404

View larger version (39K): [in a new window]   Fig. 1. Monthly summary of irrigation and rainfall data in 1994 and 1995

View larger version (42K): [in a new window]   Fig. 2. Concentrations of NO3-N in soil solution sampled at 240 cm depth, calculated amount of drainage below this depth, and estimates of cumulative amount of water and NO3-N leached below 240 cm, i.e. root zone depth of mature citrus trees—February 1994 through February 1995

View larger version (40K): [in a new window]   Fig. 3. Concentrations of NO3-N in soil solution sampled at 240 cm depth, calculated amount of drainage below this depth, and estimates of cumulative amount of water and NO3-N leached below 240 cm, i.e. root zone depth of mature citrus trees—1995 through February 1996