Part3Questions - Greenhouse Management and Structures Third...

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Unformatted text preview: Greenhouse Management and Structures Third Exam Questions 1. Define and explain, relate to the class material and provide details. (12) From the word list provided. 2. are made up of positively charge ions called and negatively charged ions called . (3) 3. List the full name and chemical symbol for the 13 inorganic elements required in a complete fertilization program, classifying them into the 3 categories defined. (Bonus: what is the 14th element that Nelson listed in the text that I did not list?) (5) 4. According to Nelson in the textbook, what are the 3 rules of watering (be specific). (3) 5. List 4 methods of topwatering and 4 methods of subirrigating greenhouse container grown plants. (4) 6. What elements are possibly found at toxic concentrations in irrigation water? (2) 7. Briefly define or describe each of the following and the characteristics it would contribute to a media if used as a component in a root media for potted plants. (4) polystyrene, perlite, vermiculite, rockwool 8. and are the two most common organic materials that make up the bulk of greenhouse and nursery potting media. (2) 9. Why are mineral soils not commonly used in potting media today? (3) 10. Explain the difference between sterilization and pasteurization of root media. (2) 11. If part of your job as a grower of greenhouse crops was to select the root media, what properties would you look for in a commercially blended media? (ie what were the desirable properties given in the notes) (3) 12. Root media is composed of A. space and pore space. The pore space is filled with either B. or C. . (2) What percent of each of the spaces above is found in a typical peat based media after irrigation, in a 6 inch pot? A. B. C (1) What percent of each of the spaces is found in a typical peat based media after irrigation, in a shallow (2") tray? A. B. C. _ (1) 14. List at least 4 different methods of determining or learning what type and how much fertilizer to apply to a greenhouse crop. (4) 15. The rate of release of fertilizer from resin coated fertilizer is controlled by the coating or manufacturing process and . (1) 16. What qualities or properties of the fertilizer are considered when selecting a preblended, water soluble fertilizer? (4) 17. How should a media sample for analysis be collected from a potted plant? (show a diagram and describe) 18. In a commercial greenhouse, how many pots should be sampled to make one good sample for analysis?(2) 19. I took one media sample and tested it with three different preparation methods. Which of the following result came from which sample? (3) EC (mS) method 2 5 a: 1:5 dilution method 0.4 b: 1:2 dilution method 1.1 c: saturated media extract method 20. Which part of the plant is typically sampled for elemental analysis? (2) 21. In simple terms, explain why irrigation water alkalinity influences media pH. (3) 22. What is the most important characteristic of the fertilizer influencing whether a water soluble fertilizer will have an acidic (make the pH go down) or basic (make the pH go up) reaction in the media? (3) 23. What is the recommended pH range for most floriculture crops grown in peat-based media in pots? (2) 24. Matching: Letters can be used more than once and if there is more than one answer, give both. __ height control a: auxin _ flowering b: ethylene __ rooting c: gibberellic acid _ flower senescence d: cytokinin _ leaf loss e: abcisic acid _ branching 25. List and explain five methods of non-chemical pest control. (5) 26. Currently, the most important greenhouse pests in Michigan are and . (2) 27. The most important foliar fungal pathogens are and . (2) 28. The most important root and stem rot pathogens are and . (2) 29. The Biernbaum key to successful chemical pest control is . (2) 30. Diseases infest / infect crops while insects infest / infect crops. (circle the correct choice in each case.) (2) Bonus: Where was the pH video filmed and what organization produced the video? ...
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