Why are Native Plants Sensitive?
There are a number of factors reasons for the sensitivity exhibited by native plant species. Phosphorous. Native plants have generally developed on poor, low phosphorous soils. While still requiring phosphorous for metabolic activity, native species are have developed the ability to obtain adequate phosphorus when soil phosphorous levels are very low. High phosphorous levels needed by other plant types will cause leaf burn and ultimately death of native species. Structure and Drainage. Many native plant types are sensitive to excess moisture levels. It is important that they be provided with a free draining structure with high air-filled porosity. Iron Content. Native species generally have a high requirement for iron to maintain effective growth. Salinity and Nutrient Content. Having developed on soils that were low in total nutrient content many natives are sensitive to high levels of plant nutrients. This is measured by the electrical conductivity (Ec.) or salinity of the soil. Leve
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