Ornamental plants: annual reports and research reviews

Ohio State University Extension Nursery, Landscape, and Turf Team Directory: 1998 / Jack Kerrigan -- Floriculture Industry Roundtable of Ohio: 1998 / Charles Behnke -- Ohio State University Extension Buckeye Yard and Garden Line / James A. Chatfield, Pamela J. Bennett, Joseph F. Boggs, Gary Y. Gao, Jane C. Martin, David J. Shetlar and Randall H. Zondag -- Environmental and cultural problems of ornamental plants in Ohio: 1997 / Pamela J. Bennett and Jane C. Martin -- Insect and mite activity noted in Ohio nurseries and landscapes: 1997 / Joseph F. Boggs, David J. Shetlar, Jane C. Martin, Pamela J. Bennett, James A. Chatfield, Gary Y. Gao and Chris Carlson -- Summary of ornamental diseases in Ohio: 1997 / James A. Chatfield, Nancy J. Taylor, Stephen N. Nameth, Chris Carlson, Joseph F. Boggs, Jane C. Martin, Dan Balser and David Madison -- Weed problems in Ohio landscapes and nurseries: 1997 / Gary Y. Gao, Joseph F. Boggs, Pamela J. Bennett, Jane C. Martin, Mary Ann Rose, Joseph W. Rimelspach, Randall H. Zondag and William E. Pound -- Wildlife problems in Ohio landscapes: 1997 / Gary Y. Gao, Joseph F. Boggs, Jane C. Martin, Charles T. Behnke and James A. Chatfield -- Summary of turf cultural and disease problems in 1997 / Gary Y. Gao, Joseph F. Boggs, Pamela J. Bennett, Jane C. Martin, Joseph W. Rimelspach and James A. Chatfield -- Master Gardeners serve Ohio / Marianne Riofrio -- The greening of Poland's nurseries / Kenneth D. Cochran and Wojtek Grabczewski -- The marketing potential of Ginkgo biloba in the United States / Kenneth D. Cochran -- Composts in the Landscape: Effects on Soil pH and plant growth / Mary Ann Rose and Hao Wang -- How to optimize disease control using composts / Harry A. J. Hoitink, Wei-Zheng Zhang, David Y. Han, Alexandra G. Stone, Matthew S. Krause and Warren A. Dick -- The flowering sequence of ornamental plants as a tool for predicting the phenology of insect pests / Daniel A. Herms -- Reducing maintenance costs may mean selecting plants with the fewest flaws / T. Davis Sydnor-- Comprehensive aesthetic evaluations of crabapples at Secrest Arboretum in Wooster: 1993-1997 / Erik A. Draper, James A. Chatfield, Kenneth D. Cochran, Peter W. Bristol and David E. Allen -- Precision control of microirrigation for container-grown mini-roses / Robert C. Hansen, Ted H. Short, C. C. Pasian and R. Peter Fynn -- Red thread (Laetisaria fuciformis) control study on perennial ryegrass / Joseph W. Rimelspach, Kerry Kline, Karl Danneberger and Michael Boehm-- Red thread (Laetisaria fuciformis) control study on Kentucky bluegrass / Joseph W. Rimelspach, Kerry Kline, Karl Danneberger and Michael Boehm -- Red thread - from novelty to nuisance / Joseph W. Rimelspach -- Chrysanthemum cultivars differ in response to photoperiod when grown under far-red absorbing filters / M. J. McMahon -- Improving fuchsia cutting performance by grafting / D. M. Napier and M. J. McMahon -- Paint/paclobutrazol mix on the inside surface of rooting wedge cells to control poinsettia cutting height / Claudio C. Pasian -- Response of poinsettias to paclobutrazol in paint applications / Claudio C. Pasian and Daniel K. Struve -- Dynamic transpiration of highly stressed container-grown Acer rubrum / Ted H. Short, Ahmet Irvem and Robert C. Hansen -- Effects of temperature on the development of Asiatic Lilies / J. Steininger and C. C. Pasian-- New publications for 1997-199

Identification of flood risk area in the Orontes river basin, Turkey, using multi-criteria decision analyses

The objective of this study was to evaluate flood risk area for the Orontes river basin in Turkey, using the Multi-Criteria Decision Analysis (MCDA) within the Geographic Information Systems. Flood risk areas were evaluated using rainfall, slope, elevations, size of sub-watersheds and soil types. These factors were chosen as the most influential factors for generating the flood risk map. MCDA was performed by adding the weighted flood rankings of all the causative factors, according to their relative importance to each other and to their expected importance in causing floods. ILWIS, GIS software was used for spatial analyses and MCDA. Estimated risk map for the Orontes river basin obtained by adding the weighted flood rankings of all factors classified in five categories, producing risk levels of non-flood, low, moderate, high, and very high. It was found that non-flood accounted for 1252.2 km2 (15.7%) of the total, low for 1032.3 km2 (13%), moderate for 1596 km2 (20%), high for 2607.4 km2 (32.8%) and very high flood risk area for 1471.4 km2 (18.5%). The Ministry of Agriculture and Rural Affairs of Turkey mapped the flood area for the Orontes river basin from field measurement and their observations were compared with a generated flood risk map. The comparison showed satisfactory results because observed flood area was determined to be in very high flood risk region in the flood risk map. Thus, flood risk area identification using MCDA is possibly suitable for flood planning and management

Trends in Turkish monthly mean streamflow

The research explored trends in monthly mean streamflow variables for a network of 57 Turkish streamflow gauging stations in 25 basins of Turkey. The procedure employs the Mann-Kendall rank correlation test to detect trends. The application of Mann-Kendall test resulted in the identification of significant decreasing trends at the 0.05 level appearing mostly in the basins in western Turkey whereas almost no evidence of significant change was experienced with a general downward direction in the rest of the country. Of the 57 stations, however, only 406, 712, 1226, 1402, 1517 and 2233 exhibited significant increasing trend over Turkey. The number of stations showing a decreasing trend is more than sevenfolds the number of stations with an upward trend, whereas the significant downtrend exceeded the uptrends by twentyfolds. Besides, more than half of the decreasing trends were found statistically significant while approximately 21% of the increasing trends exhibited significant trend. Hydrologically, these results indicate that Turkey is generally getting drier

Re-evaluation of trends in annual streamflows of Turkish rivers for the period 1968-2007

The Mann-Kendall rank correlation test was performed to detect trends in this study. The research investigated 3 annual stream-flow variables including annual instantaneous minimum, mean and instantaneous maximum streamflows for a network of 57 Turkish streamflow gauging stations in 25 basins of Turkey, during 1968-2007. The application of trend detection technique to 3 stream-flow variables has resulted in the identification of significant decreasing trends at the 0.05 level, appearing mostly in the basins in western and partly in southeastern Turkey, whereas almost no.evidence of significant change was experienced with a general downward direction in the rest of the country. Of the 25 basins, however, only basins with the numbers of 12 and 22 exhibited significant increasing trend for one station each. The number of stations showing a decreasing trend is more than 9-fold that of stations with an upward trend whereas the significant downtrend exceeded the uptrends 49-fold. Besides, almost 2/3 of the decreasing trends (144 times over 159) were found to be statistically significant while approximately 13% of the increasing trends (15 times) exhibited significant trend. © by PSP

Estimating spatial distribution of soil loss over Seyhan River Basin in Turkey

The purpose of this study was to investigate the spatial distribution of annual soil loss in Seyhan River Basin using USLE model. A geographic information system (GIS) was used to generate maps of the USLE factors which are rainfall erosivity (R), soil erodibility (K), slope length and steepness (LS), cover (C) and conservation practices (P) factors. By integrating these maps in GIS, spatial distribution of soil loss over the Seyhan River Basin was obtained. Annual average soil loss for the Seyhan River Basin was 16.38 t ha-1 y-1. Annual soil loss more than 200 t ha-1 y-1 in pixel level was in the southern region, while the northern region showed the lower annual values. These results are verified by comparing sediment yield measurements in the basin. An area about 198.25 km2 (0.96%) experiences extremely severe erosion risk, which needs suitable conservation measures to be adopted on a priority basis. The spatial distribution of erosion risk classes estimated 61.03% very low, 8.76% low, 23.52% moderate, 4.03% severe and 1.70% very severe. Thus, the USLE model was used in a GIS environment to identify regions susceptible to water erosion and needing immediate soil conservation planning and application in the Seyhan River Basin in Turkey. © 2006 Elsevier B.V. All rights reserved