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• causes a lack of vitality and decline within the tree as a whole. Soil compaction is commonly the result of short term heavy or any long term traffic in the root zone. The effects of soil compaction may not become apparent in the tree for decades following the initial compaction event. If signs of stress are present, a soil test may be made to assess the fertility of the soil. Testing establishes the presence and degree of vital nutrients and micro-flora. Vital soil is essential to vital tree growth, the presence of nutrients and organisms within the soil mean that growth can continue. An imbalance of nutrients can cause poor vitality; often exhibited by leaf discoloration, distortion or lack of annual growth. Poor nutrition will slow growth and can diminish the trees natural defense mechanisms and expose the tree to disease. In nature, few tree species grow alone; the forest is their natural and protected setting. Whether native or introduced, irregardless of a trees origin, trees in a landscape setting demand special attention. Although bound by the genetic code of its predecessors each tree is also the product of its local E�nvironment in terms of health and stability. Looking at the overall picture, the health and condition of the soil, turF and other plants and trees can reveal the cause of disease, or indicate potential problems. The presence of certain species of fungus can indicate decay. Certain decay fungi may destroy support tissues and leave conductive tissues unharmed. The tree may appear healthy and continue to grow until the internal decay outpaces the new outer growth. A root crown examination may be necessary if root decay is suspected. By removing the soil at the base of the tree, the location, health and condition of the absorbing and support roots can be determined. Villas at Glenwood Terrace Tree Risk Assessment Robert W. Williams Consulting Arborist 3