Dry Weight (Biomass) References
Amaranthus retroflexus L. [Redroot Amaranth]

Bazzaz, F.A. and Carlson, R.W. 1984. The response of plants to elevated CO2. I. Competition among and assemblage of annuals at two levels of soil moisture. Oecologia 62: 196-198.

Bazzaz, F.A. and Garbutt, K. 1988. The response of annuals in competitive neighborhoods: Effects of elevated CO2. Ecology 69: 937-946.

Bazzaz, F.A., Garbutt, K., Reekie, E.G. and Williams, W.E. 1989. Using growth analysis to interpret competition between a C3 and a C4 annual under ambient and elevated CO2. Oecologia 79: 223-235.

Dippery, J.K., Tissue, D.T., Thomas, R.B. and Strain, B.R. 1995. Effects of low and elevated CO2 on C3 and C4 annuals. I. Growth and biomass allocation. Oecologia 101: 13-20.

Morse, S.R. and Bazzaz, F.A. 1994. Elevated CO2 and temperature alter recruitment and size hierarchies in C3 and C4 annuals. Ecology 75: 966-975.

Valerio, M., Tomecek, M.B., Lovelli, S. and Ziska, L.H. 2011. Quantifying the effect of drought on carbon dioxide-induced changes in competition between a C3 crop (tomato) and a C4 weed (Amaranthus retroflexus). Weed Research 51: 591-600.

Zangerl, A.R. and Bazzaz, F.A. 1984. The response of plants to elevated CO2. II. Competitive interactions among annual plants under varying light and nutrients. Oecologia 62: 412-417.

Ziska, L.H. 2003. Evaluation of yield loss in field sorghum from a C3 and C4 weed with increasing CO2. Weed Science 51: 914-918.

Ziska, L.H. and Bunce, J.A. 1997. Influence of increasing carbon dioxide concentration on the photosynthetic and growth stimulation of selected C4 crops and weeds. Photosynthesis Research 54: 199-208.

Ziska, L.H. and Bunce, J.A. 1999. Effects of elevated carbon dioxide concentration at night on the growth and gas exchange of selected C4 species. Australian Journal of Plant Physiology 26: 71-77.

Ziska, L.H., Teasdale, J.R. and Bunce, J.A. 1999. Future atmospheric carbon dioxide may increase tolerance to glyphosate. Weed Science 47: 608-615.

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