38. Andre, M., and H. Du Cloux. 1993. Interaction of CO2 Enrichment and Water Limitations on Photosynthesis and Water-Use Efficiency in Wheat. Plant Physiology and Biochemistry 31:103-112. 186. Drake, B. G. 1992. A Field Study of the Effects of Elevated CO2 on Ecosystem Processes in a Chesapeake Bay Wetland. Australian Journal of Botany 40:579-595. 488. Nie, D., H. He, M. B. Kirkham, and E. T. Kanemasu. 1992. Photosynthesis of a C3 Grass and a C4 Grass under Elevated CO2. Photosynthetica 26:189-198. 618. Ryle, G. J. A., C. E. Powell, and V. Tewson. 1992. Effect of elevated co2 on photosynthesis, respiration and growth of perennial ryegrass. Journal of Experimental Botany 43:811-818. 754. Ziska, L. H., and J. A. Bunce. 1993. Inhibition of Whole Plant Respiration by Elevated CO2 as Modified by Growth Temperature. Physiologia Plantarum 87:459-466. 765. Baker, J. T., L. H. Allen Jr., and K. J. Boote. 1992. Response of Rice to Carbon Dioxide and Temperature. Agricultural and Forest Meteorology 60:153-166. 2066. Samarakoon, A. B., W. J. Muller, and R. M. Gifford. 1995. Transpiration and leaf area under elevated CO2: Effects of soil water status and genotype in wheat. Australian Journal of Plant Physiology 22:33-44. 2119. Greer, D. H., W. A. Laing, and B. D. Campbell. 1995. Photosynthetic responses of thirteen pasture species to elevated CO2 and temperature. Australian Journal of Plant Physiology 22:713-722. 2125. Baxter, R., M. Gantley, T. W. Ashenden, and J. F. Farrar. 1994. Effects of elevated carbon dioxide on three grass species from montane pasture. Journal of Experimental Botany 45:1267-1287. 2132. Rao, M. V., B. A. Hale, and D. P. Ormrod. 1995. Amelioration of ozone-induced oxidative damage in wheat plants grown under high carbon dioxide. Plant Physiology 109:421-432. 2133. Tuba, Z., K. Szente, and J. Koch. 1994. Response of photosynthesis, stomatal conductance, water use efficiency and production to long-term elevated CO2 in winter wheat. Journal of Plant Physiology 144:661-668. 2158. Gloser, J., and M. Bartak. 1994. Net photosynthesis, growth rate and biomass allocation in a rhizomatous grass Icalamagrostis epigejos grown at elevated CO2 concentration. Photosynthetica 30(1):143-150. 2159. Ziska, L. H., and J. A. Bunce. 1994. Increasing growth temperature reduces the stimulatory effect of elevated CO2 on photosynthesis or biomass in two perennial species. Physiologia Plantarum 91:183-190. 2168. Knapp, A. K., E. P. Hamerlynck, and C. E. Owensby. 1993. Photosynthetic and water relations responses to elevated CO2 in the C4 grass Andropogon geradii. International Journal of Plant Science 154(4):459-466. 2184. Saebo, A., and L. M. Mortensen. 1995. Growth and regrowth of Phleum pratense, Lolium perenne, Trifolium repens and Trifolium pratense at normal and elevated O2 concentration. Agriculture, Ecosystems and Environment 55:29-35. 2192. Knapp, A. K., J. T. Fahnestock, and C. E. Owensby. 1994. Elevated atmospheric O2 alters stomatal responses to variable sunlight in a C4 grass. Plant, Cell and Environment 17:189-195. 2202. Wilsey, B. J., S. J. McNaughton, and J. S. Coleman. 1994. Will increases in atmospheric O2 affect regrowth following grazing in C4 grasses from tropical grasslands? Oecologia 99:141-144. 2208. Crush, J. R. 1994. Elevated atmospheric O2 concentration and rhizosphere nitrogen fixation in four forage plants. New Zealand Journal of Agricultural Research 37:455-463. 2211. Morgan, J. A., W. G. Knight, L. M. Dudley, and H. W. Hunt. 1994. Enhanced root system C-sink activity, water relations and aspects fo nutrient acquisistion in mycotrophic Bouteloua gracilis subjected to CO2 enrichment. Plant and Soil 165:139-146. 2227. Bowler, J. M., and M. C. Press. 1993. Growth responses of two contrasting upland grass species to elevated CO2 and nitrogen concentration. New Phytologist 124:515-522. 2229. Mitchell, R. A. C., V. J. Mitchell, S. P. Driscoll, J. Franklin, and D. W. Lawlor. 1993. Effects of increased CO2 concentration and temperature on growth and yield of winter wheat at two levels of nitrogen application. Plant, Cell and Environment 16:521-529. 2246. Baxter, R., T. W. Ashenden, T. H. Sparks, and J. F. Farrar. 1994. Effects of elevated carbon dioxide on three montane grass species. Journal of Experimental Botany 45 (272):305-315. 2300. Bassirirad, H., D. T. Tissue, J. F. Reynolds, and F. S. Chapin. 1996. Response of Eriophorum vaginatum to CO2 enrichment at different soil temperature: effects on growth, root respiration and PO-4 uptake kinetics. New Phytologist 133:423-430. 2312. Wilsey, B. J. 1996. Urea additions and defoliation affect plant responses to elevated CO2 in a C3 grassland from Yellowstone National Park. Oecologia 108:321-327. 2315. Casella, E., J. F. Soussana, and P. Loiseau. 1996. Long-term effects of CO2 enrichment and temperature increase on a temperate grass sward. 1. Productivity and water use. Plant and Soil 182:83-99. 2316. Soussana, J. F., E. Casella, and P. Loiseau. 1996. Long-term effects of CO2 enrichment and temperature increase on a temperate grass sward. 2. Plant nitrogen budgets and root fraction. Plant and Soil 182:101-114. 2329. Jones, M. B., M. Jongen, and T. Doyle. 1996. Effects of elevated carbon dioxide concentrations on agricultural grassland production. Agricultural and Forest Meteorology 79:243-252. 2330. Stewart, J., and C. Potvin. 1996. Effects of elevated CO2 on an artificial grassland community: competition, invasion and neighbourhood area. Functional Ecology 10:157-166. 2337. Saebo, A., and L. M. Mortensen. 1996. The influence of elevated CO2 concentration on growth of seven grasses and one clover species in a cool maritime climate. Acta Agriculturae Scandinavia Section B-Sorland Plant Science 46:49-54. 2341. Schappi, B., and C. Korner. 1996. Growth responses of an alpine grassland to elevated CO2. Oecologia 105:43-52. 2342. Jackson, R. B., and H. L. Reynolds. 1996. Nitrate and ammonium uptake for single and mixed species communities grown at elevated CO2. Oecologia 105:74-80. 2345. Hakala, K., and T. Mela. 1996. The effects of prolonged exposure to elevated temperatures and elevated CO2 leveles on the growth, yield and dry matter partitioning of filed-sown meadow fescue. Agricultural and Food Science in Finland 5(3):285-298. 2347. Jackson, R. B., Y. Luo, Z. G. Cardon, O. E. Sala, C. B. Field, and H. A. Mooney. 1995. Photosynthesis, growth and density for the dominant species in a CO2 enriched grassland. Journal of Biogeography 22:221-225. 2350. Teughels, H., I. Nijs, P. Van Hecke, and I. Impens. 1995. Competition in a global change environment: The importance of different plant traits for competitive success. Journal of Biogeography 22:297-305. 2351. Campbell, B. D., W. A. Laing, D. H. Gree, J. R. Crush, H. Clark, D. Y. WIlliamson, and M. D. J. Given. 1995. Variation in grassland populations and species and the implications for community responses to elevated CO2. Journal of Biogeography 22:315-322. 2357. Chu, C. C., C. B. Field, and H. A. Mooney. 1996. Effects of CO2 and nutrient enrichment on tissue quality of two California annuals. Oecologia 107:433-440. 2358. Ferris, R., I. Niy, T. Bejaeghe, and I. Impens. 1996. Contrasting CO2 and temperature effects on leaf growth of perennial rye grass in spring and summer. Journal of Experimental Botany 47:1033-1043. 2362. Wheeler, T. R., G. R. Batts, R. H. Ellis, P. Hadley, and J. J. L. Morison. 1996. Growth and yield of winter wheat (Triticum aestium) crops in response to CO2 and temperature. Journal of Agricultural Science 127:37-48. 2363. Volin, J. C., and P. B. Reich. 1996. Interaction of elevated CO2 and O3 on growth, photosynthesis and respiration of three perennial species grown in low and high nitrogen. Physiologia Plantarum 97:674-684. 2364. Miglietta, F., A. Giuntoli, and M. Bindi. 1996. The effect of free air carbon dioxide enrichment (FACE) and soil nitrogen availability on the photosynthetic capacity of wheat. Photosynthesis Research 47:281-290. 2366. Ziska, L. H., W. Weerakoon, O. S. Namuco, and R. Pamplona. 1996. Influence of nitrogen on the elevated CO2 response in field-grown rice. Australian Journal of Plant Physiology 23:45-52. 2367. Saebo, A., and L. M. Mortensen. 1996. Growth, morphology and yield of wheat, barley and oats grown at elevated atmospheric CO2 concentration in a cool maritime climate. Agriculture, Ecosystems and Environment 57:9-15. 2369. Ziska, L. H., P. A. Manalo, and R. A. Ordonez. 1996. Intraspecific variaiton in the response of rice (Oryza sativa L) to increased CO2 and temeprature: growth and yield response of seventeen cultivars. Journal of Experimental Botany 47:1353-1359. 2372. Nijs, I., H. Teughels, H. Blum, G. Hendrey, and I. Impens. 1996. Simulation of climate change with infrared heaters reduces the productivity of Lolium perenne L in summer. Environmental and Experimental Botany 36:271-280. 2379. Veisz, O., N. Harnos, L. Szunies, and T. Tischner. 1996. Overwintering of winter cereals in Hungary in the case of global warming. Euphytica 92:249-253. 2383. Nijs, I., and I. Impens. 1996. Effects of elevated CO2 concentration and climate-warming on photosynthesis during winter in Lolium perenne. Journal of Experimental Botany 47:915-924. 2387. Leadley, P. W., and J. Stocklin. 1996. Effects of elevated CO2 on model calcareous grasslands: Community, species, and genotype responses. Global Change Biology 2:389-397. 2395. Tuba, Z., K. Szente, Z. Nagy, Z. Csintalan, and J. Koch. 1996. Responses of CO2 assimilation, transpiration and water use efficiency to long-term elevated CO2 in perennial C3 xeric loess steppe species. Journal of Plant Physiology 148:356-361. 2398. Mortensen, L. M., and A. Saebo. 1996. The effects of elevated CO2 concentration on growth of Phleum pratense L. in different parts of the growth season. Acta Agriculturaie Scandinavia Section B-Soil and Plant Science 46:128-134. 2401. Jackson, R. B., and A. L. Reynolds. 1996. Nitrate and annomium uptake for single- and mixed species communities grown at elevated CO2. Oecologia 105:74-80. 2403. Fanymeier, A., U. Geuters, U. Hesstein, H. Sandhagel, A. Hoffmann, B. Vermebren, and A. J. Jager. 1996. Effects of elevated CO2, nitrogen supply and tropospheric ozone on spring wheat. 1. Growth and Yields. Environmental Pollution 91:381-390. 2407. Kinball, B. A., P. J. Pinter, R. L. Garcia, R. L. La Mort, G. W. Wall, D. J. Hunsaker, G. WEchsung, F. Wechsung, and T. Kartschall. 1995. Productivity and water use of wheat under free-air CO2 enrichment. Global Change Biology 1:429-442. 2420. Hunt, H. W., E. T. Elliot, J. K. Detling, J. A. Morgan, and D. X. Chen. 1996. Responses of a C3 and a C4 perennial grass to elevated CO2 and temperature under different water regimes. Global Change Biology 2:35-47. 2427. Samarakoon, A. B., and R. M. Gifford. 1996. Elevated CO2 effects on water use and growth of maize in wet and drying soils. Australian Journal of Plant Physiology 23:53-62. 2430. Ruget, F., O. Bethenod, and L. Combe. 1996. Repercussions of increased atmospheric CO2 on maize morphogenesis and growth for various temperature and radiation levels. Maydica 41:181-191. 2440. Frank, A. B., and A. Bauer. 1996. Temperature, nitrogen and carbon dioxide effects on spring wheat development and spikelet numbers. Crop Science 36:659-665. 2441. Read, J. J., and J. A. Morgan. 1996. Growth and partitioning in Pascopyrum smithii (C3) and Bouteloua graciles (C4) as influenced by carbon dioxide and temperature. Annals of Botany 77:487-496. 2443. Polley, H. W., H. B. Johnson, H. S. Mayeux, D. A. Brown, and J. W. C. White. 1996. Leaf and plant water use efficiency of C4 species grown at glacial to elevated CO2 concentrations. International Journal of Plant Sciences 157:164-170. 2444. Bowler, J. M., and M. C. Press. 1996. Effects of elevated CO2 nitrogen form and concentration on growth and photosynthesis of a fast- adn slow-growing grass. New Phytologist 132:391-401. 2448. RowlandBamford, A. J., J. T. Baker, H. L. Allen, and G. Bowes. 1996. Interactions of CO2 enrichment and temperature on carbohydrate accumulation and partitioning in rice. Environmental and Experimental Botany 36:111-124. 2454. Bagash, D. Z., M. J. Paul, M. A. J. Parry, A. J. Keys, and D. W. Lawlor. 1995. Increased capacity for photosynthesis in wheat grown at elevated CO2. The relationship between electron-transport and carbon metabolism. Planta 197:482-489. 2468. Rao, M. V., and L. J. Dekok. 1994. Interactive effects of high CO2 and SO2 on growth and antioxidant levels in wheat. Phyton-Annales Rei Botanicae 34:279-290. 2474. Newbery, R. M., J. Wolfenden, T. A. Mansfield, and A. F. Harrison. 1995. Nitrogen, phosphorus and potassium uptake and demand Agrostis capillaria. The influence of elevated CO2 and nutrient supply. New Phytologist 130:565-574. 2480. Lenssen, G. M., W. E. Vandium, P. Jak, and J. Roxema. 1995. The response of Aster tripolium and Puccinellia maritima to atmospheric carbon dioxide enrichment and their interaction with flooding and salinity. Aquatic Botany 50:181-192. 2492. Schenk, U., R. Maderscheid, J. Hugen, and H. J. Weigel. 1995. Effects of CO2 enrichment and intraspecific competition on biomass partitioning, nitrogen content, and microbial biomass carbon in soil of perennial rye grass and white clover. Journal of Experimental Botany 46:987-993. 2502. Jacob, J., C. Greitner, and B. G. Drake. 1995. Acclimation of photosynthesis in relation to Rubisco and non-structural carbohydrate contents and in-situ carboxylase activity in Scirpus olnei grown at elevated CO2 in the field. Plant, Cell and Environment 18:875-884. 2503. Jongen, M., M. B. Jones, T. Hebeisen, H. Blum, and G. Hendrey. 1995. The effects of elevated CO2 concentrations on the root growth of Lolium perenne and Trifolium repens grown in a FACE system. Global Change Biology 1:361-371. 2504. Kleemola, J., J. Peltonen, and P. Peltonen-Sainio. 1994. Apical development and growth of Barley under different CO2 and nitrogen regimes. Journal of Agronomy and Crop Science 173:79-92. 2510. Demothes, M. A. G., and D. Knoppik. 1994. Effects of long term enhanced CO2 partial pressure on gas exchange parameters and saccharide pools of wheat leaves. Photosynthetica 30:435-445. 2521. Balaguer, L., J. D. Barnes, A. Panicucci, and A. M. Borland. 1995. Production and utilization of assimilates in wheat leaves exposed to elevated O3 and/or CO2. New Phytologist 129:557-568. 2522. Barnes, J. D., J. H. Ollerenshaw, and C. P. Whitfield. 1995. Effects of elevated CO2 and/or O3 on growth, development and physiology of wheat. Global Change Biology 1:129-142. 2525. Hattenschwiler, S., and C. Korner. 1996. System-level adjustments to elevated CO2 in model spruce ecosystems. Global Change Biology 2:377-387. 2531. Owensby, C. E., P. I. Coyne, J. M. Ham, L. M. Avea, and A. K. Knapp. 1993. Biomass production in a tallgrass prairie ecosystem exposed to ambient and elevated CO2. Ecological Applications 3:644-653. 2541. Jackson, R. B., O. E. Sala, C. B. Field, and H. A. Mooney. 1994. CO2 alters water use, carbon gain, and yield for the dominant species in a natural grassland. Oecologia 98:257-262. 2547. Baker, J. T., L. H. Allen, and K. J. Boote 1992. Temperature effects on rice at elevated CO2 concentration. Journal of Experimental Botany 43:959-964. 2579. Billes, G., H. Rouhier, and P. Bottner. 1993. Modifications of the carbon and nitrogen allocations in the plant Triticum aestivum L. soil system in response to increased atmospheric CO2 concentration. Plant and Soil 157:215-225. 2580. Baker, J. T., S. L. Albrecht, D. Pan, L. H. Allen, N. B. Pickering, and K. J. Boote. 1994. Carbon dioxide and temperature effects on rice (Oryza sativa L., CV 1R-72). Soil and Crop Science Society of Florida, Proceedings 53:90-97. 2595. Santruce, J., H. Santurckova, J. Kueton, M. Simkoua, and K. Rohacek. 1994. The effect of elevated CO2 concentration on photosynthetic CO2 fixation, respiration and carbon economy of wheat plants. Rostlinna Vyroba 40:689-696. 2597. Ingaurdsen, C., and B. Veierskov. 1994. Response of young barley plants to CO2 enrichment. Journal of Experimental Botany 45:1373-1378. 2644. Reeves, D. W., H. H. Royers, S. A. Prior, C. W. Wood, and G. B. Runion. 1994. Elevated atmospheric carbon dioxide effects on sorghum and soybean nutrient status. Journal of Plant Nutrition 17:1939-1954. 2654. Jackson, R. B., Y. Lou, Z. G. Cardon, O. E. Sala, C. B. Field, and H. A. Mooney. 1995. Photosynthesis, growth and density for the dominant species in a CO2 enriched grassland. Journal of Biogeography 22:221-225. 2666. Samarakoon, A. B., and R. M. Gifford. 1995. Soil water content under plants at high CO2 concentrations and interaction with the direct CO2 effects: A species comparison. Journal of Biogeography 22:193-202. 2669. Schenk, U., A. J. Jager, and H. J. Weigel. 1996. Nitrogen supply determine responses of yeild and biomass partitioning of perennial rye grass to elevated atmospheric carbon dioxide concentrations. Journal of Plant Nurtition 19:1423-1440. 2692. Kimball, B. A., P. J. P. Pinter, R. L. Garcia, R. L. LaMorte, G. W. Wall, D. J. Hunsaker, G. Wechsung, F. Wechsong, and T. Kartschall. 1995. Productivity and water use of wheat under free-air CO2. Global Change Biology 1:429-442. 2698. Potvin, C., and L. Vasseur. 1997. Long-term CO2 enrichment of a pasture community: species richness, dominance, and succession. Ecology 78:666-677. 2709. Hebeisen, T., A. Luscher, and J. Nosberger. 1997. Effects of elevated atmospheric CO2 and nitrogen fertilisation on yield of Trifolium repens and Lolium perenne. Acta Oecologica/Oecologia Plantarum 18:277-284. 2710. Hebeisen, T., A. Luscher, S. Zanetti, B. U. Fischer, U. A. Hartwig, M. Frehner, G. R. Hendrey, H. Blum, and J. Nosberger. 1997. Growth response of Trifolium repens L and Lolium perenne L as monocultures and bi-species mixture to free air CO2 enrichment and management. Global Change Biology 3:149-160. 2711. Ghannoum, O., S. vonCaemmerer, E. W. R. Barlow, and J. P. Conroy. 1997. The effect of CO2 enrichment and irradiance on the growth, morphology and gas exchange of a C3 (Panicum laxum) and a C4 (Panicum antidotale) grass. Australian Journal of Plant Physiology 24:227-237. 2715. Cotrufo, M. F., and A. Gorissen. 1997. Elevated CO2 enhances below-ground C allocation in three perennial grass species at different levels of N availibility. New Phytologist 137:421-431. 2718. Wilsey, B. J., J. S. Coleman, and S. J. McNaughton. 1997. Effects of elevated CO2 and defoliation of grasses: A comparative ecosystem approach. Ecological Applications 7:844-853. 2723. Stirling, C. M., P. A. Davey, T. G. Williams, and S. P. Long. 1997. Acclimation of photosynthesis to elevated CO2 and temperature in five British native species of contrasting functional type. Global Change Biology 3:237-246. 2735. Nijs, I., and I. Impens. 1997. An analysis of the balance between root and shoot activity in Lolium perenne cv Melvina. Effects of CO2 concentration and air temperature. New Phytologist 135:81-91. 2737. Mortensen, L. M. 1997. Effects of carbon dioxide concentrations on three grass species grown in mixture in two soil types at different ozone concentrations or temperatures. Acta Agriculturae Scandinavica, Section B, Soil and Plant Sciences 47:14-19. 2756. Hamerlynck, E. P., C. A. McAllister, A. K. Knapp, J. M. Ham, and C. E. Owensby. 1997. Photosynthetic gas exchange and water relation responses of three tallgrass prairie species to elevated carbon dioxide and moderate drought. International Journal of Plant Sciences 158:608-616. 2758. Stocker, R., P. W. Leadley, and C. Korner. 1997. Carbon and water fluxes in a calcareous grassland under elevated CO2. Functional Ecology 11:222-230. 2785. Hungate, B. A., J. Canadell, and F. S. Chapin. 1996. Plant species mediate changes in soil microbial N in response to elevated CO2. Ecology 77:2505-2515. 2793. Fitter, A. H., G. K. Self, J. Wolfenden, M. M. I. vanVuuren, T. K. Brown, L. Williamson, J. D. Graves, and D. Robinson. 1996. Root production and mortality under elevated atmospheric carbon dioxide. Plant and Soil 187:299-306. 2802. Casela, E., and J. F. Soussana. 1997. Long-term effects of CO2 enrichment and temperature increase on the carbon balance of a temperate grass sward. Journal of Experimental Botany 48:1309-1321. 2821. Schapendonk, A. H. C. M., P. Dijkstra, J. Groenwold, C. S. Pot, and S. C. vandeGeijn. 1997. Carbon balance and water use effciency of frequently cut Lolium perenne L swards at elevated carbon dioxide. Global Change Biology 3:207-216. 2834. Baxter, R., T. W. Ashenden, and J. F. Farrar. 1997. Effect of elevated CO2 and nutrient status on growth, dry matter partitioning and nutrient content of Poa alpina var vivipara L. Journal of Experimental Botany 48:1477-1486. 2835. Bassirirad, H., J. F. Reynolds, R. A. Virginia, and M. H. Brunelle. 1997. Growth and root NO3- and PO43- uptake capacity of three desert species in response to atmospheric CO2 enrichment. Australian Journal of Plant Physiology 24:353-358. 2839. Lin, W. H., L. H. Ziska, O. S. Namuco, and K. Bai. 1997. The interaction of high temperature and elevated CO2 on photosynthetic acclimation of single leaves of rice in situ. Physiologia Plantarum 99:178-184. 2855. Wolf, J. 1996. Effects of nutrient supply (NPK) on spring wheat response to elevated atmospheric CO2. Plant and Soil 185:113-123. 2856. Nakamura, T., M. Osaki, T. Koike, Y. T. Hanba, E. Wada, and T. Tadano. 1997. Effect of CO2 enrichment on carbon and nitrogen interaction in wheat and soybean. Soil Science and Plant Nutrition 43:789-798. 2892. McKee, I. F., J. F. Bullimore, and S. P. Long. 1997. Will elevated CO2 concentrations protect the yield of wheat from O3 damage? . Plant, Cell and Environment 20:77-84. 2893. Manderscheid, R., and H. J. Weigel. 1997. Photosynthetic and growth responses of old and modern spring wheat cultivars to atmospheric CO2 enrichment. Agriculture, Ecosystems and Environment 64:65-73. 2895. Sicher, R. C., and J. A. Bunce. 1997. Relationship of photosynthetic acclimation to changes of Rubisco activity in field-grown winter wheat and barley during growth in elevated carbon dioxide. Photosynthesis Research 52:27-38. 2911. Mulholland, B. J., J. Craigon, C. R. Black, J. J. Colls, J. Atherton, and G. Landon. 1997. Impact of elevated atmospheric CO2 and O3 on gas exchange and chlorophyll content in spring wheat (Triticum aestivum L). Journal of Experimental Botany 48:1853-1863. 2919. VanVuuren, M. M. I., D. Robinson, A. H. Fitter, S. D. Chasalow, L. Williamson, and J. A. Raven. 1997. Effects of elevated atmospheric CO2 and soil water availability on root biomass, root length, and N, P and K uptake by wheat. New Phytologist 135:455-465. 2924. Vu, J. C. V., L. H. Allen, K. J. Boote, and G. Bowes. 1997. Effects of elevated CO2 and temperature on photosynthesis and Rubisco in rice and soybean. Plant, Cell and Environment 20:68-76. 2928. Ziska, L. H., O. Namuco, T. Moya, and J. Quilang. 1997. Growth and yield response of field-grown tropical rice to increasing carbon dioxide and air temperature. Agronomy Journal 89:45-53. 2935. Baker, J. T., L. H. Allen, K. J. Boote, and N. B. Pickering. 1997. Rice responses to drought under carbon dioxide enrichment. 1. Growth and yield. Global Change Biology 3:119-128. 3033. Patterson, D. T., and E. P. Flint. 1980. Potential effects of global atmospheric CO2 enrichment on the growth and competitiveness of C3 and C4 weed and crop plants. Weed Science 28:71-75. 3034. Potvin, C., and B. R. Strain. 1985. Photosynthetic response to growth temperature and CO2 enrichment in two species of C4 grasses. Canadian Journal of Botany 63:483-487. 3035. Potvin, C., and B. R. Strain. 1985. Effects of CO2 enrichment and temperature on growth in two C4 weeds, Enchinochloa crus-galli and Eleusine indica. Canadian Journal of Botany 63:1495-1499. 3036. Sionit, N., and D. T. Patterson. 1984. Responses of C4 grasses to atmospheric CO2 enrichment. I. Effect of irradiance. Oecologia 65:30-34. 3038. Carter, D. R., and K. M. Peterson. 1983. Effects of a CO2 enriched atmosphere on the growth and competitive interaction of a C3 and a C4 grass. Oecologia 58:188-193. 3041. Morison, J. I. L., and R. M. Giford. 1984. Plant growth and water use with limited water supply in high CO2 concentrations. II. Plant dry weight, partitioning, and water use efficiency. Australian Journal of Plant Physiology 11:375-384. 3042. Wong, S. C. 1979. elevated atmospheric partial pressure of CO2 and plant growth. I. Interactions of nitrogen nutrition and photosynthetic capacity in C3 and C4 plants. Oecologia 44:68-74.