Ten-year average growth rates in the spruce-fir region of northern New England
1968
Safford, Lawrence O.
"In the 16 years since this study was begun, many changes have occurred. The chain-saw has replaced the ax and bucksaw, and it in turn is being challenged by tree-harvesting machines. River-driving has given way to truck-hauling; horses are giving way to crawler tractors and rubber-tired skidders; and so on. And today, new questions are being asked about intensive forest management practices designed to meet the ever-increasing demands placed upon our spruce-fir forests. The growth figures presented here provide a foundation upon which answers to these questions may be developed. The purpose of this study was to obtain estimates of the overall growth rates in the spruce-fir forests of northern New England. The study was designed to estimate the growth rate of the spruce-fir component with an accuracy of plus or minus 10 percent.S3.
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Издатель Northeastern Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture | Upper Darby, Pa. : Northeastern Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1968
Эту запись предоставил National Agricultural Library