Plant Science 1024 Test 3 Week one notes
Plant Science 1024 Test 3 Week one notes AGPS 1024-001
Arkansas Tech University
Popular in Principles of plant science
Popular in Agriculture and Forestry
AGBU 2063 - 001
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This 2 page Class Notes was uploaded by Emily Geels on Friday March 4, 2016. The Class Notes belongs to AGPS 1024-001 at Arkansas Tech University taught by Dr. Collins in Spring 2016. Since its upload, it has received 15 views. For similar materials see Principles of plant science in Agriculture and Forestry at Arkansas Tech University.
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Date Created: 03/04/16
Plant Science 1024 with Dr. Collins Test #3 Material I. Irrigation A. The amount of soil moisture must be supplemented with irrigation. B. If field capacity drops below 50%, irrigation is needed. C. Not all irrigation water will be used by the plant. D. Two ways water is lost: 1. Run off 2. Evaporation E. There are four general methods of soil irrigation: 1. Surface irrigation a. Used in dry/semi-dry regions with level, flat surfaces b. Four main types: i. Furrow (flat) - Depends on gravity ii. Flood - Cranberry bog - Water distributed in a continuous sheet iii. Corrugation - Water will follow contour to collet in ditches iv. Contour/Border - Levis are used to enclose an area like a bowl c. Advantages: i. Low initial cost d. Disadvantages: i. Bad for soil structure 2. Sprinkler irrigation a. Became popular after WWII i. light aluminum pipes ii. Quick couplers iii. Better nozzles b. Advantages: i. Land doesn’t have to be level ii. Less erosion iii. Less drainage and waste water c. Disadvantages: i. Initial investment is higher due to the amount of equipment ii. Wind interferes with distribution of water iii. Evaporation loss is high iv. Trees block water coverage v. Foliage will get wet, encouraging disease 3. Subsurface irrigation a. Dependent on soil hardpan characteristics 4. Drip irrigation a. Invented in Israel b. Popular in fruit orchards, nurseries c. In the field there is a porous hose water oozes out of d. Spaghetti tube watering e. Advantages: i. Foliage stays dry ii. Water goes where you want iii. No erosion iv. Less equipment v. Light weight f. Disadvantages: i. Dirt can clog lines ii. Machinery can snag the lines iii. Could have fungus build up iv. Rodents will chew on lines II. Protection A. Prevailing winds can cause several problems. 1. Erosion 2. Wind damage 3. Temperature drops 4. Snow accumulation B. In some areas, the sun can cause problems with temperature control within a structure. 1. Deciduous vs evergreen 2. Wind breaks can be useful up to 10-12 times the height of the wind break tree row. 3. Deciduous trees will cool a greenhouse during summer but allow light to enter during the winter. 4. Frost protection: a. Cover the plant to preserve heat b. Fake clouds will reflect heat c. Sprinkler (from test 1) d. Efficient, clean burning heaters e. Foam can insulate the plant f. Giant fans (like Hollywood)
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