Relationship of tree survival and yield to coal-spoil characteristics

A study was made of the relationships between 7· to 8.year survival and yield of two broadleaved and five coniferous species and a number of selected chemical characteristics of Iowa coal.spoil materials. The objectives were: (1) to determine if survival and yield of these tree species are related to the chemical characteristics of the spoils, (2) to identify those spoil chemicals most closely related to survival and yield of each of the tree species tested and (3) to provide this information to permit formulation of hypotheses for future controlled experiments

Effects of light and soil moisture on forest tree seedling establishment

The present studies were designed to aid in the solution of forest tree seedling establishment problems common to stand conversion practices in Iowa. The primary objectives were: (1) to determine the minimum treatment needed to insure successful survival and growth; (2) to study the relationships of light and soil moisture in plant competition resulting from stand conversion; and (3) to evaluate five species of conifers - European larch, Scotch pine, eastern white pine, Norway spruce and red pine - for adaptability to region, site and underplanting. Field studies were made at the Brayton Forest in northeastern Iowa and consisted of ( 1 ) practical understory treatments to increase survival and growth of five underplanted conifers and (2) controlled experiments to evaluate overstory and understory competition in such plantings. Studies at the State Forest Nursery near Ames were planned to determine the relative growth and photosynthetic characteristics of three of the underplanted conifers (European larch, eastern white pine and Norway spruce) and two shrubby hardwood species ( dogwood and hazel) which offer serious understory competition in the forest

Tree survival and growth on Iowa coal-spoil materials

An evaluation was made of 7- to 8- year survival and growth of 15 tree species of conifers and hardwoods planted on several classes of coal-spoil materials in southeastern Iowa. The more important results were: 1. Green ash survived better than all other species on a variety of coal-spoil materials and appeared best adapted to the more moist sites on the moderately acid to calcareous spoils. 2. Cottonwood grew much faster than all other species on a variety of coal-spoil materials and grew to more than double the height of green ash. 3. Survival and growth of eastern redcedar were best on the calcareous coal-spoil materials. This species is drouth resistant and can be planted on the drier sites. 4. Survival and growth of all pine species tested were very poor on the calcareous coal- spoil materials; apparently, these pines should not be planted on calcareous shales and glacial tills. 5. Of all species tested, jack and Virginia pine appeared best adapted to the dry sites on the strongly and moderately acid spoil materials. Pitch pine was adapted to the same materials but probably should be planted on more moist sites. 6. Red and eastern white pine were best adapted to the slightly acid, more fertile, moist, well-drained sites, and plantings of these species probably should be limited to these locations.https://lib.dr.iastate.edu/specialreports/1036/thumbnail.jp

Relationship of tree survival and yield to coal-spoil characteristics

A study was made of the relationships between 7· to 8.year survival and yield of two broadleaved and five coniferous species and a number of selected chemical characteristics of Iowa coal.spoil materials. The objectives were: (1) to determine if survival and yield of these tree species are related to the chemical characteristics of the spoils, (2) to identify those spoil chemicals most closely related to survival and yield of each of the tree species tested and (3) to provide this information to permit formulation of hypotheses for future controlled experiments.</p

Tree survival and growth on Iowa coal-spoil materials

An evaluation was made of 7- to 8- year survival and growth of 15 tree species of conifers and hardwoods planted on several classes of coal-spoil materials in southeastern Iowa. The more important results were: 1. Green ash survived better than all other species on a variety of coal-spoil materials and appeared best adapted to the more moist sites on the moderately acid to calcareous spoils. 2. Cottonwood grew much faster than all other species on a variety of coal-spoil materials and grew to more than double the height of green ash. 3. Survival and growth of eastern redcedar were best on the calcareous coal-spoil materials. This species is drouth resistant and can be planted on the drier sites. 4. Survival and growth of all pine species tested were very poor on the calcareous coal- spoil materials; apparently, these pines should not be planted on calcareous shales and glacial tills. 5. Of all species tested, jack and Virginia pine appeared best adapted to the dry sites on the strongly and moderately acid spoil materials. Pitch pine was adapted to the same materials but probably should be planted on more moist sites. 6. Red and eastern white pine were best adapted to the slightly acid, more fertile, moist, well-drained sites, and plantings of these species probably should be limited to these locations.</p

Effects of light and soil moisture on forest tree seedling establishment

The present studies were designed to aid in the solution of forest tree seedling establishment problems common to stand conversion practices in Iowa. The primary objectives were: (1) to determine the minimum treatment needed to insure successful survival and growth; (2) to study the relationships of light and soil moisture in plant competition resulting from stand conversion; and (3) to evaluate five species of conifers - European larch, Scotch pine, eastern white pine, Norway spruce and red pine - for adaptability to region, site and underplanting. Field studies were made at the Brayton Forest in northeastern Iowa and consisted of ( 1 ) practical understory treatments to increase survival and growth of five underplanted conifers and (2) controlled experiments to evaluate overstory and understory competition in such plantings. Studies at the State Forest Nursery near Ames were planned to determine the relative growth and photosynthetic characteristics of three of the underplanted conifers (European larch, eastern white pine and Norway spruce) and two shrubby hardwood species ( dogwood and hazel) which offer serious understory competition in the forest.</p

Forestry research review, 1973

Introduction / G. E. Gatherum and A. R. Vogt -- Genetic improvement of Northern red oak / D. B. Houston -- Selection and breeding of sugar maple / H. B. Kriebel -- Clonal selection of cottonwood / D. B. Houston -- Selection of black walnut for timber production / H. B. Kriebel -- Wood properties in black locust clones / F. W. Whitmore -- Evaluation of species and seed sources for Christmas tree planting in Ohio -- Selection and breeding of white pine / H. B. Kriebel -- Eastern white pine research: air pollution / D. B. Houston -- Embryo development in Eastern white pine / T. H. Shafe