SCSC 428 Final Exam Review Questions With Complete Solutions

Why is an oak seedling unable to tolerate close mowing, but a grass plant can? correct answer: Because oak seedling is not a turfgrass plant that can be mowed down short into a playing surface like a golf green or baseball field. Oak seedling needs a higher height of cut in order to prevent scalping. Explain how Type I and Type II plant growth regulators differ with regards to their effects on turfgrass growth and development? correct answer: Type I is a growth inhibitor and Type II is a growth enhancer. Type I's focus is mainly on seedhead growth while Type II's focus is more on the use of Gibberelin and normal growth development. Where are vascular bundles located? What types of cells do they contain, and what is their function in the plant? correct answer: Vascular bundles are located in the stem or the leaves of the plant typically with phloem on the outside and xylem on the inside. It is part of the transport system in a plant and provides support and protection tissues. From a physiological standpoint, explain two ways that frequent mowing helps contribute to a highly dense stand of turf. correct answer: Close, frequent mowing increases the amount of tillering and increases development of plants at the site of the nodes. This makes the grass denser. Describe how the flowering culm develops. Is initiation and growth of new leaves possible once the culm has been fully developed? correct answer: Flowering culms are developed through the rhizomes and grow up through the turf surface through grasses and sedges. New initiation of growth and leaves is possible. Explain why elevated organic matter is a problem for turfgrass soils, and explain some of the cultural strategies for managing organic matter. correct answer: Elevated OM in turfgrass soils is a problem because eventually they can lead to dangerous levels which can kill root development and over time will harden or compact and also kill grass. Usually the aerifier is setup with 3" hollow tines and 2x2 spacings depending on weather/location. T/F: Grass roots have apical meristems. correct answer: True T/F: To meet USGA specs, a sand must contain at least 40% of medium+coarse particles. correct answer: False T/F: There are 3 intercalary meristems on a grass leaf. correct answer: True T/F: Warm-season turf tends to flower between January and June. correct answer: False T/F: The best time to apply Nitrogen (N) for promotion of tillering in C₃ turf is Fall. correct answer: True T/F: The most elongation of grass lea