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Height Growth Manifest: Studies conducted in 1954 by Theodore T. Kozlowski and R.C. Ward at Westfield, Mass., confirmed that in a number of species elongation commences in late spring and continues for several weeks. Rates of elongation are low at the outset, increase rapidly, and then diminish about midsummer. In more northern latitudes, elongation commences later in the year and the growing period is shorter. Patterns of seasonal height growth manifest pronounced similarities, although some species grow much faster than others, and are characterized by a longer period of growth each year.
Lateral growth in trees frequently begins later than growth in height, but the period of lateral growth is longer. Rates of lateral growth likewise are low at the outset, increasing after a few weeks and then diminishing. In view of the long annual period of lateral growth in trees, deleterious environmental conditions may exercise a pronounced effect on growth. In the wood of trees of temperate regions, narrow and wide growth rings may be observed, marking years characterized by unfavorable and favorable conditions for growth.
Once started, mow whenever growth necessitates. With most grasses as soon as they are half to three quarters of an inch to one inch higher than established cutting height. This may mean once a week at times, but in periods of rapid growth twice-a-week attention is necessary, and when growth is slow more time may elapse between mowings. It pays to mow frequently and to take a little each time rather than a lot. Don't let the grass get so high before mowing that after cutting it looks yellowish or brownish. This is an invitation to crab grass; diseases and pests. If bad weather prevents mowing before the grass is conspicuously longer than proper, raise the cutting height a little at the first mowing and gradually bring it to normal at subsequent cuttings.
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