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Agriculture Year 11 Complete Study Notes
Agriculture
48 Pages • Complete Study Notes • Year Uploaded: 2022
Contains Notes on all Topics 1-7. Preview... Plant Production ● Describe chemical characteristics of a soil including; soil pH, ion exchange capacity, soil carbon and nutrient status Soil pH - Measurement of hydrogen ions in soil - Lower pH higher amount of H ions - 10x more ions each shift down scale - Limits available nutrients to plant - Decrease microbes, reduces plant varieties able to grow - Modify; adding lime, addition of fertilisers, monitoring of nitrogen fertilisers Ion Exchange Capacity - Measurement of how many cations can be retained on soil surfaces - Cations (positive ions) held by negatively charged particles OM and clay - Measured using electrical probes - Effect; Lower CEC = regular fertilising required, plants lack nutrients, High CEC = soils retain nutrients - Modify; change pH, manage fertilisers, miantain OM
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