Loss of Anatomical Parts Transpiration Mechanical Damage to Seeds Planting Depth Weed History Plant Competition How do Trees Affect the Environment? Beneficial Microbes Halo Blight Lab Koch's Postulates

---

Copyright 2000, Iowa State University Agronomy Department, Ames, Iowa. All rights reserved.  Questions, comments, feedback - Email us! URL: http://www.agron.iastate.edu/plantscience