quiz02_review - Weed Science, PLS 4601c Section 7644 and...

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Weed Science, PLS 4601c Section 7644 and Grad. – Prin. Of Weed Science AGR 6932 Section 9212 University of Florida - Davie http://grove.ufl.edu/~turf/weedscience/ Philip Busey, turf@ufl.edu 954-579-3932 (cell) May 18, 2009 Material from May 14 for Quiz #2 on May 21 Below are the main things discussed on weeds, chemistry, and biology in the form of questions, some with answers. Please read sections 1, 2, 3, 9, 14, and 15 in “Weed Science – Learning Concepts”. If there is anything you don’t understand, call, write, or look it up. Please review “Quiz 1 – Physical and Natural Sciences and Mathematics (Review)” especially questions 1 through 14 . The answers are: 1 (a), 2 (c), 3 (d), 4 (162), 5 (a), 6 (a), 7 (b), 8 (b), 9 (a), 10 (b), 11 (c), 12 (d), 13 (b), 14 (e – really all of the above), 15 (b), 16 (b), 17 (d), 18 (a), 19 (a) 20 (b). Weeds 1. What are two different definitions of a weed? The definition in many textbooks is that weeds are unwanted plants. The definition that Phil Busey prefers is that weeds are plants that are adapted to disturbed habitats. Using the second definition, what biological characteristics are often present in weeds? What disturbances occur naturally? 2. How can weeds be both beneficial and detrimental? Give examples. 3. How do weeds often grow in patches? We looked at patches of weeds growing in front of the main building including green shrimp plant and matchweed. How might a site have different kinds of weeds dominating in different areas? (Remember where dollarweed grows.)
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quiz02_review - Weed Science, PLS 4601c Section 7644 and...

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