1. B. A. Auld, and C. A. Tisdell .1988 .Influence of spatial distribution of weeds on crop yield loss., Plant Prot. Q, 3 :81 .
2. The Effect of Weed Distribution on Predictions of Yield Loss
3. J. Cardina, G. A. Johnson, and D. H. Sparrow .1997 .The nature and consequence of weed spatial distribution., Weed Sci, 45 :364 –373 .
4. R. Cousens, 1987 .Theory and reality of weed control thresholds., Plant Prot. Q, 2 :13 –20 .
5. X. Delannay, T. T. Bauman, and D. H. Beighley .1995 .Yield evaluation of a glyphosate-tolerantG. maxline after treatment with glyphosate., Crop Sci, 35 :1461 –1467 .