It is possible for nitrogen in fertilizers to cause plant burning, but the slow release fertilizers reduce that. The seasons affects which level of nitrogen fertilizer to use. Generally, it's high nitrogen in the spring, and low nitrogen in the fall. Fertilizing can be a more profitable form of tree care, because of low material costs, low risk, and can be a one person job. A. Working load is 10 percent of tensile strength.
Sharp blades are very important.
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