1. C. N. Bensch, M. J. Horak, and D. Peterson .2003 .Interference of redroot pigweed (Amaranthus retroflexus), Palmer amaranth (A. palmeri), and common waterhemp (A. rudis) in soybean., Weed Sci, 51 :37 –43 .
2. Ecophysiology of Amaranthus palmeri, a sonoran desert summer annual
3. Photosynthetic Organs of Desert Plants
4. R. G. Hartzler, D. D. Buhler, and D. E. Stoltenberg .1999 .Emergence characteristics of four annual weed species., Weed Sci, 47 :578 –584 .
5. M. J. Horak, and T. M. Loughin .2000 .Growth analysis of four Amaranthus species., Weed Sci, 48 :347 –355 .