1984/09/14: Carol Eickhoff to George Ware (3.38476)
Date: September 14 1984Creator: Eickhoff, Carol
Type: Document
Description:Letter from Carol Eickhoff of Servicemaster Industries Inc. to George Ware thanking him for providing slides for a conference as well as the contribution of 50 seedling trees.
Extent: 1 sheet
Timing of stem growth for Oaks from around the world (3.44168)
Date: 2010 – 2018Creator: Rollinson, Christine R.
Type: Dataset
Description:Dendrometer band installation was performed by Rollinson and Duckett, and monitoring will be performed by these two along with volunteers. Installation protocols can be found here. Monitoring will be conducted once per week, year-round on 32 oak trees in The Morton Arboretum Oak Collection. Diameter at breast height (DBH) and circumference are measured at the time of dendrometer installation, and the weekly measurements will show the increase in circumference over time, which may be converted to diameter if necessary. Trees were selected that were native to the Chicago area of Illinois, were accessioned before the year 2000 so they would be large enough to install dendrometer bands, and had at least three individuals fitting the first two criteria. The English oak, Quercus robur, was also included.
Comparison of growth and recovery in response to drought stress across wood types (3.67072)
Date: 2019Type: Dataset
Description:Droughts are one of the major phenomena that affect the development and growth of trees. That is why this study was carried out in order to know which trees are more efficient at the time of recovery and continue to grow after having suffered a year of drought. To this end, samples were taken from the rings of 12 tree species found in The Morton Arboretum in Illinois. These were dried, assembled and sanded, to then facilitate the measurements of their widths for each year of rings, thus obtaining an average group of years where the trees were almost completely affected. After our initial belief that the non-porous trees were more suitable in times of drought, we found that porous trees, or even more specific diffuse trees, are more suitable in the event of droughts.
Tree Growth Data (3.67114)
Date: 2019Type: Dataset
Description:Tropical rainforests provide a multitude of ecosystem services and hold a large role in the global carbon cycle, but they are currently under threat by deforestation and anthropogenic influences. Understanding factors that increase tree growth can help protect and conserve tropical ecosystems. The Earth Forest Fertilization Experiment (EFFEX) is a nitrogen (N) and phosphorus (P) nutrient addition experiment that has been conducted at EARTH University located in Guacimo, Limon, Costa Rica. It is a full factorial block setup with 24 plots that have been fertilized twice per year since 2007 and where a variety of biological parameters have been measured, including diameter at breast height (dbh) of all trees larger than 10cm dbh. Our study explores how the effects of chronic fertilization affect tree growth over a decade. We hypothesized that P treatment would result in increased mean growth rates because P is thought to be a limiting nutrient in lowland tropical rainforests. However, we found that there is not a significant effect of additional nutrient application and tree growth at the community level. This may be attributed to Liegis law of the minimum due to another limiting resource that is preventing an increase in biomass and primary productivity. At the species level, there was not a significant effect of additional nutrient application and tree growth for Pentaclethra macroloba. There was a significant effect of additional nutrient application of N and P separately for Socratea exorrhiza. Our results can be used to better understand resource limitation in tropical rainforests and competition between neighboring trees.
Morton Arboretum Street Tree Collection Growth Rate Charts (3.82247)
Type: Document
Description:A collection of data sheets and graphs with height and trunk diameters for the Street Tree Collection at the Morton Arboretum from their planting date to 1985.
Extent: 6 sheets
Street Tree Collection -- Fall, 1976 (3.82248)
Date: 1976Type: Document
Description:A collection of data sheets with height and trunk diameters for the Street Tree Collection at the Morton Arboretum taken Fall, 1976.
Extent: 11 sheets
Bulletin of Popular Information V. 23 No. 3 (3.82249)
Date: March 1948Creator: Kammerer, E. Lowell
Type: Document
Description:In-house publication of the Morton Arboretum. This particular issue discusses expected growth rates for trees common to Northern Illinois home landscapes.
Extent: 1 sheet, folded