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Crop Sciences

College of Agricultural, Consumer, and Environmental Sciences
University of Illinois at Urbana-Champaign
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Table 2: Waterhemp biomass and seed production as influenced by emergence date and shade
(data from 2000, Urbana)

Shade Level Emergence on May 23 Emergence on June 23
plant weight (lb) Seeds/plant Plant weight (lb) Seeds/plant
0 1.22 1,493,736 0.38 602,031
40 0.99 806,599 0.38 318,117
67 0.48 367,659 0.25 92,635
95 0.004 2 0.004 4