AGR 1110 Lecture 6: lecture #6 & #7
18 Oct 2016
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Document Summary
As you progress from macro to secondary to micronutrients, the plant needs less of them and perhaps more importantly the difference between insufficient levels resulting in deficiency and excessive levels resulting in toxicity becomes closer. Organic matter, the residue of once living organisms which is composed of organic compounds, varies in how rapidly it breaks down. Thus the type or source of organic matter varies in terms of how quickly it can release nutrients into the soil and in some cases can initially lower the amount of available nutrients. The ph of the soil determines the proportion of the nutrients that are available to the plant. Soil tests will determine: level of nutrients in the soil, ph of the soil, organic matter content of the soil, cation exchange capacity of the soil see page 487 for an example of a soil test report.
