• 1
    Atjay, G.L., Ketner, P., Duvigneaud. P. (1979) Terrestrial primary production and phytomass. The Global Carbon Cycle (eds B. Bolin, E. Degens, S. Kempe & P. Ketner), pp. 129–182. SCOPE 13. Wiley, Chichester.
  • 2
    Hanes, T.L. (1977) Chaparral. Terrestrial Vegetation of California (eds M. G. Barbour & J. Majors), pp. 417–420. John Wiley and Sons, New York.
  • 3
    Hendrey, G.R. (1993) FACE: Free-Air CO2 Enrichment for Plant Research in the Field. CRC Press Inc., Boca Raton, FL.
  • 4
    Hendrey, G.R. & Kimball, B. (1990) FACE: Free-Air Carbon Dioxide Enrichment Program Summary. GPO 513–0401-M. Government Printing Office, Washington, DC.
  • 5
    Hendrey, G.R., Lewin, K., Nagy, J. (1993) Control of carbon dioxide in unconfined field plots. Design and Execution of Experiments on CO2 Enrichment (eds E.-D. Schulze & H. A. Mooney), pp. 309–327. E. Guyot SA, Brussels.
  • 6
    Le Houerou, H.N. (1995) The Sahara from the bioclimatic viewpoint: definitions and limits. Annals of Arid Zones 12, 116.
  • 7
    Kimball, B., Printer, P.J. Jr, Mauney, J.R. (1993) Cotton leaf and boll temperatures in the 1989 FACE experiment. FACE: Free-Air CO2 Enrichment for Plant Research in the Field (ed. G. R. Hendrey), pp. 233–240. CRC Press Inc., Boca Raton, FL.
  • 8
    McLeod, A.R. & Baker, C.K. (1988) The use of open-field systems to assess yield response to gaseous pollutants. Assessment of Crop Loss from Air Pollutants (eds W. W. Heck, O. C. Taylor & D. T. Tingley), pp. 181–210. Elsevier Applied Science, London.
  • 9
    McLeod, A.R., Fackerell, J.E., Alexander, K. (1985) Open-air fumigation of field crops: criteria and design for a new experimental system. Atmospheric Environment 12, 16391649.
  • 10
    Manning, W.J. & Krupa, S.V. (1992) Experimental methodology for studying the effects of ozone on crops and trees. Surface Level Ozone Exposures and their Effects on Vegetation (ed. A. S. Lefohn), pp. 93–156. Lewis Publishers, Chelsea, MI.
  • 11
    Miglietta, F., Lanini, M., Bindi, M., Magliulo, V. (1997) Free air CO2 enrichment of potato (Solanum tuberosum, L.): design and performance of the CO2-fumigation system. Global Change Biology 12, 417427.
  • 12
    Miller, P.C., Hajek, E., Poole, D.K., Roberts, S.W. (1981) Microclimate and energy exchange. Ecological Studies vol. 39. Resource use by Chaparral and Matorral (ed. P. C. Miller), pp. 97–121. Springer-Verlag, New York.
  • 13
    Nagy, J., Lewin, K.F., Hendrey, G.R., Lipfert, F.W., Daum, M.L. (1993) FACE facility engineering performance in 1989. FACE: Free-Air CO2 Enrichment for Plant Research in the Field (ed. G. R. Hendrey), pp. 165–185. CRC Press Inc., Boca Raton, FL.
  • 14
    Oechel, W.C., Hastings, S.J., Vourlitis, G.L., Jenkins, M.A., Hinkson, C.L. (1995) Direct effects of CO2 in chaparral and mediterranean-type ecosystems. Global Change and Mediterranean-Type Ecosystems. Ecological Studies 117 (eds J. M. Moreno & W. C. Oechel), pp. 58–75. Springer, New York.
  • 15
    Reece, C.F., Krupa, S.V., Jaeger, H.-J., Roberts, S.W., Hastings, S.J., Oechel, W.C. (1995) Evaluating the effects of elevated levels of atmospheric trace gases on herbs and shrubs: a prototype dual array field exposure system. Environmental Pollution. 12, 2531.
  • 16
    Runeckles, V.C., Wright, E.F., White, D. (1990) A chamberless field exposure system for determining the effects of gaseous air pollutants on crop growth and yield. Environmental Pollution 12, 6177.
  • 17
    Shinskey, F.G. (1988) Process Control Systems, 3rd edn. McGraw-Hill Book Co., New York.
  • 18
    Xu, G., Walklate, P.J., McLeod, A.R. (1997) Numerical study of a full-size free-air fumigation system. Agricultural and Forest Meteorology 12, 159170.