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Horticulture 2:

QuestionAnswer
Which external factors do most plants require to grow and persist?(3) light, chemical elements, soil in living system,
Soil are natural bodies composed of: weathered rock 45%...air 25%..... water 25%.... organic matter 5%
Formation of Soil: 5 steps 1. Parent Rock -chemical/ physical weathering 2. Climate 3. Biology 4. Topography 5. Time
Chemical weathering is faster in areas of high rainfall T?F T
In dry acid regions chemical weathering is faster and salts accumulate in absence of leaching T?F F
Picture of a Crop REMEMBER ITS AGRONOMY AGRONOMY AGRONOMY AGRONOMY
Soil formation- Plants secrete chemicals into soil
What do Microorganisms do? decompose, release, and recycle nutrients into soil
What is soil-less media? light weight holds moisture in nutrients
O? A? B? C? O- organic matter A- surface soil B- Zone of accumulation:sub soil C- unweathered to slightly weathered material
Whats the biggest soil particles? Sand, gravel and stone
Created by: murphy1717
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