4.1 Objectives

Learning Objectives

After completing this chapter, you will be able to:

• Compare and contrast physical, morphological and physiological types of dormancy.
• Explain the role of phytochrome in germination.
• Describe different weed seed dispersal mechanisms.
• Describe and explain the pattern of weed migration by seeds.
• Contrast ecological patterns of annuals and perennials
• Define vocabulary words: seed bank, seed viability and seed dormancy