TY - JOUR TI - Rootstock and scion chilling effects on apple and peach bud break AU - Young, E. AU - Werner, D. J. T2 - Compact Fruit Tree DA - 1984/// PY - 1984/// VL - 17 SP - 32 ER - TY - JOUR TI - ROOTSTOCK AND PRUNING EFFECTS ON 1ST SEASON DRY-WEIGHT DISTRIBUTION IN DELICIOUS APPLE-TREES AU - YOUNG, E AU - WERNER, DJ T2 - JOURNAL OF HORTICULTURAL SCIENCE AB - SummaryRedchief Delicious apple trees on MM. 106 and M.9 rootstocks were left unpruned, dormant headed at planting, or summer headed 12 weeks after planting, to investigate pruning and rootstock effects on dry weight distribution between roots and shoots during the first growing season. Dormant heading stimulated new shoot dry weight and reduced new root dry weight during the first six weeks after planting. However, by 12 weeks differences in new root dry weight and new shoot dry weight were insignificant. Summer heading resulted in a significant increase in new shoot growth and decrease in new root growth. This caused the root/shoot ratio in headed trees to return to the unpruned value within six weeks after summer heading. New root growth was reduced over a longer time by dormant heading trees on MM. 106 than those on M.9. New shoot growth was increased longer in trees on M.9. Allometric constants (K) of new shoot growth relative to new root growth were significantly changed by dormant heading with both rootstocks. Summer heading had the greatest effect on K values by shifting growth heavily toward new shoots. Root/shoot ratios in all treatments for both rootstocks showed no differences 24 weeks after planting. DA - 1984/// PY - 1984/// DO - 10.1080/00221589.1984.11515222 VL - 59 IS - 4 SP - 487-492 SN - 0022-1589 ER - TY - JOUR TI - Effects of rootstock and scion chilling during rest on resumption of growth in apple and peach AU - Young, E. AU - Werner, D. J. T2 - Journal of the American Society for Horticultural Science DA - 1984/// PY - 1984/// VL - 109 IS - 4 SP - 548 ER - TY - JOUR TI - A nondestructive method for measuring shoot and root fresh weights AU - Young, E. AU - Werner, D. J. T2 - HortScience DA - 1984/// PY - 1984/// VL - 19 IS - 4 SP - 554 ER - TY - CHAP TI - Defining gaseous pollution problems in North America AU - Heck, W. W. T2 - Gaseous air pollutants and plant metabolism A2 - Koziol, M. J. A2 - Whatley, F. R. PY - 1984/// DO - 10.1016/b978-0-408-11152-2.50010-5 SP - 35 PB - London: Butterworths SN - 9780408111522 ER - TY - JOUR TI - ASSESSING IMPACTS OF OZONE ON AGRICULTURAL CROPS .2. CROP YIELD FUNCTIONS AND ALTERNATIVE EXPOSURE STATISTICS AU - HECK, WW AU - CURE, WW AU - RAWLINGS, JO AU - ZARAGOZA, LJ AU - HEAGLE, AS AU - HEGGESTAD, HE AU - KOHUT, RJ AU - KRESS, LW AU - TEMPLE, PJ T2 - JOURNAL OF THE AIR POLLUTION CONTROL ASSOCIATION AB - A principal objective of the National Crop Loss Assessment Network (NCLAN) is to develop O/sub 3/ dose-crop yield response models for use in assessing the effects of O/sub 3/ on economically important crop species and cultivars. This paper is part of a third assessment report from NCLAN. The NCLAN is composed of several cooperating programs with field sites in different regions of the country. Open-top chambers allow control of O/sub 3/ concentration-crop yield functions for the major crops studied in 1980 and 1981, and for all crops studied during 1982. Four O/sub 3/ averaging times (exposure statistics) are used in a Weilbull model for each experimental data set. Models derived using two seasonal mean O/sub 3/ statistics (1-h/day and 7-h/day means) and two seasonal peak O/sub 3/ statistics (1-h and 7-h) are compared. The results suggest that all four O/sub 3/ statistics are of similar value when obtained from and used for the same data set. Seasonal mean O/sub 3/ statistics can be used to develop models which can be used to estimate yield of a given crop from data obtained from different sites or from different years at one site. However, peak statistics obtained from one site cannot bemore » used to predict yield from data obtained at a second site, or from data obtained at the same site in different years. 12 references, 4 tables.« less DA - 1984/// PY - 1984/// DO - 10.1080/00022470.1984.10465815 VL - 34 IS - 8 SP - 810-817 ER -