Report on the Agricultural Experiment Stations, 1952 Page: 35
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FARM FORESTRY INVESTIGATIONS 35
Studies in progress at the Oregon station show that Anjou pears
withstood satisfactorily a storage temperature of 28 F. inside the
packed box. The fruits held at 28 softened more slowly and yellowing
was greatly retarded. Fruits removed from 28-storage after several
months developed a satisfactory texture and flavor. However, a
low temperature, the station reports, is practical only with reliable
controls and adequate air circulation.
FARM FORESTRY INVESTIGATIONS
In many parts of the Nation, the farm forest is a highly important
factor in the economy of the farming enterprise since it supplies fuel
wood, fence posts, farm lumber, and occasional sales of marketable
timber. In the winter and off-season periods, the farm forest can provide
a profitable outlet for farm labor and enable the owner to maintain
labor on a permanent rather than a seasonal basis. Although the
silvicultural principles that apply to large forests also supply to the
small farm forests, there are necessary adaptations. The farmer cannot
employ skilled foresters nor can he utilize economically the large
machinery that is associated with extensive forest operations. The
professional foresters of the State stations recognize the farmer's
problem and are endeavoring to help him solve it.
North Carolina station foresters found that burning is a necessary
prerequisite to the successful regeneration of pond pine. On the unburned
area only about 30 pond pine seedlings were recorded per acre,
but in contrast an average of some 34,000 seedlings were counted on
areas burned but not logged. Areas burned after logging had more
seedlings than areas burned over before logging. Continued studies
are in progress to determine proper season for burning, mimimum intensity
of fire required, and other pertinent factors.
That fires may be a definite hazard in the oak stands in Missouri was
revealed in a study by the station foresters of the nature of defects
in 6ak logs. Fire wounds caused the most loss of all the causes of
hidden defects, and white oak showed more of such injuries than did
black or scarlet oaks. The Missouri station also investigated the value
of different chemicals in the killing of inferior species of trees in the
farm forest. Applications of Ammate to stumps were more effective
in summer than in winter.
Foliage sprays with both 2,4,5-Tp and Ammate were rather ineffective
in preventing resprouting, even though apparently effective in
killing the original growth. Frill applications of both Ammate and
2,4,5-Tp were very satisfactory in killing certain species.
Studies conducted by the Minnesota station (coop. USDA) have
revealed significant differences in the growth rate and growth habit
of jack pines grown in northern Minnesota from seed collected in
different locations in the jack pine range. The discovery of superior
strains of forest species, such as jack pine, would mean more productive
farm plantations and greater returns to the grower.
At the Michigan station flats and bands cut from cottonwood lumber
at veneer plants were treated with 11 different wood preservatives in
an attempt to increase their durability. Flower and vegetable seeds
were sown later in the treated receptacles, and records were kept on
the performance of the resulting plants. Preliminary findings show
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United States. Office of Experiment Stations. Report on the Agricultural Experiment Stations, 1952, book, January 1953; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc5990/m1/37/: accessed November 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.