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12 Cards in this Set
- Front
- Back
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What plant processes are influenced by temperature?
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-photosynthesis
-respiration -enzyme activity -transpiration -stomatal opening -pollination -seed germination |
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What is the limiting factor for growing plants outdoors?
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-temperature
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What daytime temperatures do cool season crops need?
-Night temperatures? -Crop examples |
60-75 degrees
50-60 degrees +spinach, cabbage, lettuce, radish, beets, peas, carrots, onions |
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What daytime temperatures do warm season crops need?
-Night temperatures? -Crop examples |
70-85 degrees
60-70 degrees +corn, beans, tomatoes, vine crops *do not tolerate frost so should not be planted until the ground warms |
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How does photosynthesis and respiration effect growth and storage?
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-photosynthesis leads to an increase in growth and storage, respiration decreases them.
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When does respiration occur? Photosynthesis?
Which increases more in high temperatures? |
-day and night
-day only +respiration |
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What is a growing degree unit?
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-mean temperature minus the base temperature
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What is the base temperature?
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-the point where plants will not grow/develop
-either 40 or 50 depending on crop |
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What are some uses of heat units?
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-predict time to harvest
-predict flowerin date -determine if a crop will grow in a certain area |
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What is phenology?
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-relating the development of one plant to some aspect of another
-Greek for "the science of appearances" Ex; prune roses when forsythia blooms |
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What causes plant injury during winter?
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-intercellular and intracellular ice formation
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What are some factors that affect hardiness in winter?
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-kind of plant
-temperature during autumn -soil moisture -light -nutrition |
