Treesearch

Maximum early gains in the genetic improvement of eastern cottonwood (Populus deltoides Bartr.) in the lower Mississippi Valley are most likely to be achieved through identification and commercial vegetative propagation of superior genotypes. A relatively simple improvement program having this goal might include evaluation of progeny from phenotypically superior mother-trees followed by clonal tests of outstanding juvenile phenotypes selected from progeny. Such an approach is being used in the first phase of the cottonwood improvement program at the Southern Forest Experiment Station. This...

The reproductive systems of forest trees that have evolved in wild habitats are usually characterized by delayed flowering age, cyclic seed years, and possibly an optimum, rather than a maximum, number of seeds per tree. Presumably these characteristics are favored by natural selection, though not necessarily in all species or in all situations.

Lake States pulpwood production in 1965 was 3,636,000 cords, a minor increase of 8,000 cords from 1964 and only 26,000 cords less than the record production of 1963. This paper shows pulpwood production for 1965 by county and species for each of the Lake States and compares production by species and Forest Survey District for several previous years. Also presented are data on 1965 pulpwood production and receipts by state for Illinois, Iowa, and Missouri.

Gives brief reports on 133 forest tree improvement research projects conducted by 12 agencies and 8 developmental tree improvement projects being conducted by 4 agencies in Michigan, Minnesota, North Dakota, and Wisconsin. Reports the object, species studied, methods, accomplishments, cooperators, and assignment for each project. Includes indexes by genera and subject matter categories, research workers, and cooperators.

This paper describes how to estimate present values of incomes and costs in growing red pine trees for sale as cordwood or sawtimber, and how to calculate expectation values and rates of return for a wide range of timber-growing conditions, using the tables of expectation value indexes and interest rate multipliers provided. It illustrates how to compare investment opportunities in growing red pine, how to determine the amount one can afford to invest to buy land, establish and maintain a stand, or pay in annual taxes or other expenses, and how to estimate the cost of producing stumpage...

Scleroderris canker, a disease caused by the fungus Scleroderris lagerbergii Gremmen, has a long history of injuries to young pine plantations and nurseries in Europe. It was recently identified as the cause of serious damage in the Lake States. During the summer and fall of 1965, a survey was conducted in Upper Michigan and northern Wisconsin to determine the distribution and intensity of Scleroderris canker in 2- to 10-year old red and jack pine plantations on National Forest land. The results showed that Scleroderris canker was widespread over the Ottawa and Hiawatha National Forests in...

Four years of service testing 90 red oak pallets showed that those made with predrilled air-dry deckboards and green stringers gave better service and cost less to maintain than pallets made entirely from either green or air-dry lumber.

Lists 172 papers published by staff members of the Lake States Forest Experiment Station from 1924 to 1965. The papers are listed alphabetically by authors. Also contains an index by subject matter and an index by species scientific names.

Included are (1) 22 technical papers (by researchers from many sections of the United States and Canada) pertaining to selection and progeny testing, radiation genetics, intraspecific variation, natural and artificial hybridization, breeding systems, breeding methodology and specialized tree breeding techniques, and applied breeding and allied fields; (2) concise descriptions of 16 genetic studies visited on the Kellogg Forest of Michigan State University; and (3) brief reports of the activities of the Lake State Forest Tree Improvement Committee and the Society of American Foresters'...

Eleven out of 24 conifer species planted in western Iowa appear to be adapted to local conditions. Success increases with increase in depth to free carbonates in soil.