Ornamental plants: annual reports and research summaries

The Ohio State University Extension Nursery, Landscape, and Turf Team (ENLTT) -- Extension Nursery, Landscape, and Turf Team (ENLTT) directory -- An evaluation of composts for landscape soil amendments / Mary Ann Rose and Hao Wang -- Aesthetic evaluation of crabapples at Secrest Arboretum in Wooster, Ohio: 1994-1995 / James A. Chatfield, Erik A. Draper, Kenneth C. Cochran, Peter W. Bristol and Charles E. Tubesing -- Evaluation of crabapples for apple scab at Secrest Arboretum in Wooster, Ohio: 1995 / Erik A. Draper, James A. Chatfield, Kenneth C. Cochran, Peter W. Bristol and Charles E. Tubesing -- Emergence, longevity, and aesthetic evaluations of flowers in ornamental crabapples at Secrest Arboretum in Wooster, Ohio: 1995 / Erik A. Draper, James A. Chatfield and Kenneth C. Cochran -- Environmental and cultural ornamental plant problems in Ohio: 1995 / Pamela J. Bennett and Jane A. Martin -- 1995 -A Challenging Year for Ohio golf courses / Joseph W. Rimelspach, John R. Street, Karl Danneberger, William E. Pound, Barbara Bloetscher -- Plant insect pest problems in Ohio: 1995 / Joseph F. Boggs, David J. Shetlar, Gary Yu Gao, Daniel Balser, Douglas C. Caldwell, Randall H. Zondag and James A. Chatfield -- Gypsy moth in Ohio: 1995 / Allan Baumgard, David F. James and Randall H. Zondag -- Landscape ornamental disease problems in Ohio: 1995 / James A. Chatfield, Nancy Taylor, Randall H. Zondag, Mary Ann Rose, Gary Yu Gao, Daniel R. Balser and David J. Shetlar -- The Response of native and naturalized trees to construction activity / T. Davis Sydnor, Joseph F. Boggs and Mary Ann Ros

Synthesis and Characterization of Nonbanded U-Nb Plate Material

This report describes the synthesis and characterization of four plates, two each of U-5.5Nb and U-7.5Nb (nominal wt%) for aging studies described elsewhere. The plates were induction melted and cast into graphite molds that were unheated and {approx}0.5 inches thick to maximize the cooling rate and minimize large length-scale Nb segregation (banding). Microstructural images and electron microprobe traces observed after various processing stages, including casting, hot rolling, and homogenizing are documented. The as-cast microsegregation assumed the form of an isotropic cellular structure, with an amplitude of 3-15 wt% Nb and 40-50 micron-length scales. Subsequent thermomechanical processing was shown to be sufficient to attain Nb compositional homogeneity on local scales of hundreds of microns. The results of chemical analysis and other characterization methods are given. The principal impurity elements (of the 40+ elements measured) were carbon, boron, oxygen, tantalum, and iron. In all four plates, after homogenization, the Nb distribution across the entire plate cross-section showed minima at the plate faces and a broad maximum in the center, the differential being 0.5-0.7 wt% in U-7.5Nb and 0.2-0.5 wt% in U-5.5Nb. None of the impurity elements showed statistically significant variations between the center 50% of the plate volume vs the outer 25%. These plates were considered nonbanded and compositionally homogeneous for their proposed use because the required tensile, metallographic, and dilatometer specimens could be extracted from the fairly homogeneous center portion of the plate cross-section. Characterization of the phases and their transition temperatures by x-ray diffraction and dilatometry in rapidly quenched specimens from the final product confirmed that the microstructure of this plate material was suitable for the intended aging studies. The as-quenched tensile response from multiple specimens taken from each plate showed some variability, especially in the ultimate tensile strength and elongation to failure. In general, U-5.5Nb has higher strength and less ductility than U-7.5Nb, though both alloys exhibited the double yield behavior characteristic of banded U-6Nb

Ornamental plants: annual reports and research reviews, 1999

Ohio State University Extension Nursery, Landscape, and Turf Team Directory: 2000 -- Floriculture Industry Roundtable of Ohio: 2000 -- 1999 Buckeye Yard and Garden Line (BYGL) evaluation survey / Gary Y. Gao, Pamela J. Bennett, Joseph F. Boggs, James A. Chatfield, David E. Dyke, Jane C. Martin, David J. Shetlar, Randall H. Zondag, Amy K. Stone, and Erik A. Draper -- Environmental and cultural problems of ornamental plants in Ohio: 1999 / Pamela J. Bennett and Jane C. Martin -- Insect and mite activity noted in Ohio nurseries and landscapes: 1999 / Joseph F. Boggs, David J. Shetlar, Jane C. Martin, David E. Dyke, Pamela J. Bennett, Gary Y. Gao, Daniel R. Balser, and James A. Chatfield -- Ornamental disease summary for Ohio: 1999 / James A. Chatfield, Nancy J. Taylor, Joseph F. Boggs, Jane C. Martin, Gary Y. Gao, Erik A. Draper, Pamela J. Bennett, Amy K. Stone, Randall A. Zondag, and David E. Dyke -- Summary of turf cultural and disease problems in 1999 / Gary Y. Gao, Joseph F. Boggs, Pamela J. Bennett, Jane C. Martin, David E. Dyke, Joseph W. Rimelspach, John R. Street, William E. Pound, Amy K. Stone, Erik A. Draper, and James A. Chatfield -- Weed problems in Ohio turf, landscapes, and nurseries: 1999 / Gary Y. Gao, Joseph F. Boggs, Pamela J. Bennett, Jane C. Martin, James A. Chatfield, Joseph W. Rimelspach, Randall H. Zondag, John R. Street, William E. Pound, Erik A. Draper, and Amy K. Stone -- Wildlife problems in Ohio landscapes: 1999 / Gary Y. Gao, Joseph F. Boggs, Jane C. Martin, Pamela J. Bennett, Dave E. Dyke, Gary L. Comer Jr., Amy K. Stone, Erik A. Draper, and James A. Chatfield -- A biological calendar: using plant phenology to predict insect activity / Daniel A. Herms -- Effect of container media on growth of Taxus and performance and host impact of black vine weevil larvae / Daniel A. Herms, Bradley Proper, and Harry A. J. Hoitink -- Effects of organic mulches and fertilization on soil microbial activity, nutrient availability, and river birch growth / John E. Lloyd, Daniel A. Herms, Benjamin R. Stinner, and Harry A. J. Hoitink -- New approaches to control of plant pathogens in irrigation water / Harry A. J. Hoitink and M. S. Krause -- Soil amendments and mulches in tree health management / Harry A. J. Hoitink, M. S. Krause, and Randy H. Zondag -- Establishment of grass and wildflower mixes for low-maintenance landscapes / Michael Knee -- Evaluation of crabapples for apple scab at the Secrest Arboretum in Wooster, Ohio: 1999 / James A. Chatfield, Erik A. Draper, Kenneth C. Cochran, Peter W. Bristol, and Charles F. Tubesin