United States Department of Agriculture
The third timber inventory of Missouri's Southwestern Ozarks Forest Survey Unit shows a substantial decline in the volumes of both growing stock and sawtimber between 1959 and 1972. Commercial forest area also declined substantially during the same period. Presented are highlights and statistics on forest area and timber volume, growth, mortality, ownership, and...
Reports the various applications and average costs of prescribed burning in the Central Lake States during 1972.
Red pine seedlings were grown in nine different soil media and in two types of containers in a greenhouse. Growth differed significantly among the media after 16 weeks, with the largest seedlings produced in a peat-vermiculite mix
Describes and analyzes the activities of farm building contractors and manufacturers in Illinois, Indiana, Iowa, and Missouri. Contractors and manufacturers are setting the trend in the farm building market in terms of building type and size and materials used.
Two 750 ft. piles of unbarked chips were stored for 1 year to evaluate the effect of chip storage on the effectiveness of bark-chip separations-segregation methods under study. in processing stored chips suffered more wood loss than fresh chips.
Black oak forest floor fuelbeds under 20 - and 40-year-old stands in southeast Missouri averaged 6.4 and 4.2 inches in depth, respectively. Loose Litter averaged 2.0 and 2.9 tons per acre and 3.3 inces in depth. Bulk density of litter averaged 0.33 and 0.49 lb/ft3 and of total forest floor 0.89 and 1.10 lbs/ft3, respectively.
Runoff was measured on paired litter-removed, litter-left plots in an 11-year-old European larch plantation. On five of the six pairs of plots, the plot with the litter left intact yielded more runoff. however, the differences were neither statistically nor hydrologically significant.
Volume tables are given for yield of clear-one-side, flat dimension from small, low-quality trees and boldts removed in a stand improvement cut of 54- to 76-year-old black cherry trees from northern Pennsylvania.
Seasonal weight-volume relationships were determined for rough (bark on) aspen and black spruce 100-inch pulpwood that was delivered withing 1 week after cutting in northern Minnesota during 1971-72. For aspen, the weight of wood and bark per cubic foot of wood averaged 56 pounds in the winter and 61 pounds in the summer. This relationshipfor winter-cut black spruce...
This 28th annual report shows 1973 pulpwood production by county and species group in Michigan, Minnesota, and Wisconsin. Lake States pulpwood production rose to 4.7 million cords in 1973 from 4.3 million cords in 1972.
Volume tables are given for yield of clear-one-side, flat dimension fromsmall low-quality trees and bolts removed in a stand improvement cut from 30- to 40-year-old black walnut cuttings.
Volume tables are given for yield of clear-one-side, flat dimension from small low-quality trees and bolts removed in a stand improvemtn cut of 18- to 44-year-old soft maple trees in southern Illinois.
Mandatory permits provide recreation managers with better use estimates. Because some visitors do not obtain permits, use estimates based on permit data need to be corrected. In the Boundary Waters Canoe Area, a method was devised for distinguishing noncomplying groups and finding correction factors that reflect the impact of these groups. Suggestions for improving...
Presents cross-tabulations of classes of people, activities, and causes responsible for forest fires on national forests. The data combinations indicate that greater prevention efforts might be directed toward hunters and fishermen.
Discusses principles and presents formulations for evaluating the elastic stability of thin plates subjected to edge loadings. Three different prestress methods to increase late stability are presented. A procedure is given to evaluate the elastic stability of thin shear blades under expected shearing loads.
In red pine or aspen stands only two soil samples were needed to estimate (+/- 10%, 95% confidence) pH, bulk density, or sand, but 25 to 60 samples were required to estimate N, P, K, Ca, Mg, available water, or silt + clay. To estimate most forest floor properties required 30 to 50 samples in red pine stands, but only about half as many in aspen stands.
Neither planting method nor stock treatment had any appreciable effect on survival and growth of black walnut, but survival and growth were significantly affected by the planting site and site preparation.
New site index curves for black oak are used to illustrate how contrasting tree height and diameter-growth patterns for good and poor sites are related to log quality.
Presents a method for predicting future sawtimber losses due to fire-caused wounds. Losses are in terms of: (1) lumber value in dollars, (2) volume in board feet, (3) length of defect in feet, and (4) cross sectional area of defect in square inches. The methods apply to northern red, black, scarlet, white and chestnut oaks.
Root collar sprouting of nine hardwoods was measured annually after a prescribed burn. Basswood, red oak, and paper birch were the most vigorous sprouters; sugar maple and yellow birch the least; and American elm, bur oak, ironwood and red maple were intermediate. Parent tree diameter influenced spreading.