Resin Monoterpene Defenses Decline Within Three Widespread Species Of Pine (Pinus) Along A 1530-M Elevational Gradient, 2017 New Mexico State University - Main Campus
Resin Monoterpene Defenses Decline Within Three Widespread Species Of Pine (Pinus) Along A 1530-M Elevational Gradient, Scott Ferrenberg, Joseph M. Langenhan, Jeffry B. Mitton
University Libraries Open Access Fund Supported Publications
The elevational gradient in plant defense (EGPD) hypothesis posits that natural enemy pressures increase alongside temperature across elevational climatic gradients, thereby selecting for enhanced defenses at lower elevations while leaving plants less defended at higher elevations. Phylogenetically constrained tests of this hypothesis are uncommon, with tests focused on defenses of mature trees in natural settings being exceedingly rare. In the absence of this information, predicting the spatiotemporal dynamics of forest pests that preferentially attack mature trees is rendered more difficult. Tree properties such as age, growth rate, and size have all been correlated with levels of tree defenses against insect ...
A Cellular Automaton Modeling Approach To Chestnut Blight Canker Development, 2017 Illinois State University
A Cellular Automaton Modeling Approach To Chestnut Blight Canker Development, Samuel Iselin
Annual Symposium on Biomathematics and Ecology: Education and Research
No abstract provided.
Biomass Estimations Of Invasives Yaupon, Chinese Privet And Chinese Tallow In East Texas Hardwood And Pine Ecosystems, Mike Tiller, Brian P. Oswald, Alyx Frantzen, Warren Conway, I-Kuai Hung
Forest understory fuels can have profound effects on fire behavior and crown fire initiation. Accurate fire behavior prediction in understory fuels is an essential component for estimating fire intensity and severity during wildfire and prescribed fire events. This study focused on estimating temporal and seasonal changes in fuel loading parameters associated with the expansion of invasive yaupon (Ilex vomitoria), Chinese privet (Ligustrum sinense), and Chinese tallow (Triadica sebifera) in East Texas pine and hardwood ecosystems. Fuel loading data of invasive species infested sites indicated significant increases in understory biomass when compared to 1988 estimates, suggesting a clear need to revise ...
Initial Development Of Surface Fuel Models For The Netherlands, 2017 stephen f. austin
Initial Development Of Surface Fuel Models For The Netherlands, Brian P. Oswald, Nienke Brouwer, Ester Willemsen
Estimating the spread of wildland fire is growing concern in the Netherlands, where fire events at the wildland urban interface is a growing concern with a changing climate. A multi-year project was initiated in 2012 to obtain field-based fuel measurements to be used to estimate wildland fire spread for surface fire. The overall objective was to develop either custom fuel models or utilize existing Northern American fuel models to fuel conditions in some of the hazardous vegetation in the Netherlands. Over a four-year period, 96 plots were established, a wide variety of fuel parameters measured, and ANOVA (p ≤ 0.1 ...
Effects Of Salinity And Wet–Dry Treatments On C And N Dynamics In Coastal-Forested Wetland Soils: Implications Of Sea Level Rise, 2017 Anhui Agricultural University
Effects Of Salinity And Wet–Dry Treatments On C And N Dynamics In Coastal-Forested Wetland Soils: Implications Of Sea Level Rise, Xijun Liu, Alexander Ruecker, Bo Song, William H. Conner, Alex T. Chow
Forested wetlands dominated by baldcypress (Taxodium distichum) and water tupelo (Nyssa aquatica) are commonly found in coastal regions of the southeastern United States. Global climate change and in particular sea level rise will alter the frequency and magnitude of wet/dry periods and salinity levels in these ecosystems. Soil microcosm experiments were set up to identify the effects of water level variations (0.4–3.0 g-water g-soil−1) and salinity changes (0, 1 and 5 ppt of NaCl) on greenhouse gas emissions (CH4, CO2, and N2O) and dissolved organic carbon (DOC) characteristics from forested wetland soils. Our results indicate ...
Overview Of The Us Forest Service Programs And Opportunities For Partnership, Cultivating A Culture Of Success In Natural Resources: Moving Outreach Forward In Conversation, Tony Tooke
Professional Agricultural Workers Journal
No abstract provided.
Landowners' Willingness To Supply Woody Biomass For Biofuel In West Alabama, 2017 Tuskegee University
Landowners' Willingness To Supply Woody Biomass For Biofuel In West Alabama, Gilbert Adjoyi, Ellene Kebede
Professional Agricultural Workers Journal
The Concern for national energy security, rural development, and climate change has created a wider attention for biofuels from woody biomass in recent times. For instance, West Alabama is an area of interest for stakeholders regarding the production of woody biomass. Therefore, the main objective of this study was to examine landowners’ willingness to supply woody biomass for biofuel in West Alabama. A mail survey of randomly selected landowners was conducted in eight selected counties. The results indicated that the average forestland owner is male, between ages of 40 and 57, with an average of 27 years of land ...
Walking As Ontological Shifter: Thoughts In The Key Of Life, 2017 The Graduate Center, City University of New York
Walking As Ontological Shifter: Thoughts In The Key Of Life, Bibi (Silvina) Calderaro
All Graduate Works by Year: Dissertations, Theses, and Capstone Projects
With walking as ontological shifter I pursue an alternative to the dominant modernist episteme that offers either/or onto-epistemologies of opposition and their reifying engagements. I propose this type of walking is an intentional turning towards a set of radical positions that, as integrative aesthetic and therapeutic practice, brings multiplicity and synchronicity to experience and being in an expanded sociality. This practice facilitates the conditions of possibility for recurring points of contact between the interiority perceived as ‘body’ and the exteriority perceived as ‘world.’ While making evident the self’s at once incoherence with it-self, it opens to a space ...
Assessing The Vegetative Diversity Of An East Texas Golf Course Using Principles Of Landscape Ecology, Brian P. Oswald, Penny G. Lanham, Hans M. Williams, David Kulhavy
The objectives of this study was to determine the vegetative diversity and the effects of the edge between fairways (introduced patches) and out-of-bounds areas (remnant patches) to determine if such management activities influence plant diversity. This study was conducted at the Pineywoods Country Club in the Pineywoods Region of East Texas near Nacogdoches, TX, USA by assessing the spatial distribution of these matrices and patches and their influence on edge effect composition and structure in the matrix; and, if species diversity and composition differed between these edges and interior of the matrices. Nested plots were placed along transects and canopy ...
Reconstruction Of Piñon-Juniper Forest Structure To Examine Historic Wildlife Habitat Characteristics In The Davis Mountains, Usa, Brian P. Oswald, John R. Lanham, James C. Kroll, Mohammed M. Bataineh, Yanli Zhang
Changes in piñon-juniper (Pinus spp., Juniperus spp.) communities across the southwestern United States have often decreased ecological diversity of the understory and increases of exotic species. Reconstructing age and establishment patterns provides essential understanding to guide treatments and management for anthropogenically-altered forests. The goal of this study was to determine how patterns of piñon and juniper growth in the Davis Mountains, Texas, varied over time and how this pattern influenced wildlife habitat of several indicator species. Establishment patterns and basal area growth progression were identified, canopy cover estimates regressed from pre-developed canopy regression equations to re-construct historic forest stand structure ...
Evaluating The Influence Of Stem Form And Vigor On Product Potential, Growth, And Survival For Northern Commercial Hardwood Species, Mark Castle
Electronic Theses and Dissertations
Northern hardwood and mixed-wood forest types occupy a considerable percentage of the forest landscape across the Northeastern United States and portions of eastern Canada. While capable of producing valuable saw timber and veneer products, hardwood species demonstrate a wide range of stem quality resulting from the large variety of stem forms and defects that these species can manifest. The effect of different stem forms and damage has largely not been accounted for in predictions of volume, growth, and mortality. In addition to potential bias in growth and yield applications, the lack of quantification of these features has left the efficacy ...
Irrigation For Vegetable Crops In Iowa, 2017 Iowa State College
Irrigation For Vegetable Crops In Iowa, A. T. Erwin, E. S. Haber
Does it pay to irrigate vegetable crops in Iowa?
What does it cost to irrigate? and under what conditions are these costs, plus a profit, returned to the vegetable grower?
No complete answer to these questions can be given, because of the widely varying conditions involved—differences of rainfall, of crops, of costs, of soil, of topography. But considerable light is thrown on them by experiments which the Vegetable Crops Subsection of the Iowa Agricultural Experiment Station has conducted during several years at Ames and on “Muscatine Island.’’
The Peppers, 2017 Iowa State College
The Peppers, A. T. Erwin
Peppers are native plants of tropical America, one of the few vegetables which still abound in the wild state. The earliest mention of them was in a report of Columbus’ first voyage.
The garden peppers are regarded as dwarf, early maturing forms of Capsicum frutescens. They are either annuals or perennials, according to climatic conditions.
The peppers are both self and cross-fertilized.
The collection of peppers grown in securing the data for this bulletin, included over 200 varieties, a large proportion of which were synonyms, secured from the American and European seed trade.
The Effect Of Various Containers On The Growth Of Vegetable Plants, 2017 Iowa State College
The Effect Of Various Containers On The Growth Of Vegetable Plants, E. S. Haber
The experiments indicate that clay pots are superior, as a general rule, to composition pots, paper bands or flats as a growing medium for vegetable plants. If the plants in these substitute containers, however, are watered, about every week or 10 days with a solution of nitrate of soda, sulfate of ammonia or any other nitrogenous fertilizer at the rate of 1 ounce to 1 gallon of water, plants equal to those produced in clay pots are possible. A few species may do as well without nitrates; cabbage plants grown in peat pots were slightly better than those in clay ...
Evaluating Mine Soil Prepared By Scraper Pans For Herbaceous Plants And Pine Seedlings At An East Texas Lignite Surface Mine, 2017 Stephen F. Austin State University
Evaluating Mine Soil Prepared By Scraper Pans For Herbaceous Plants And Pine Seedlings At An East Texas Lignite Surface Mine, Hannah Z. Angel
Electronic Theses and Dissertations
Since 1974, Luminant Mining Company, LLC (Luminant) has planted over 38.7 million trees on its reclaimed lignite surface mine operations in Texas. For decades, the use of improved reclamation techniques on Luminant’s mined lands have resulted in over 31,160 ha reclaimed to forests, wildlife habitat, and pastures with productivity levels similar to those found on unmined lands. The development of new reclamation methodologies offers opportunities to further improve productivity of planted trees at Luminant’s Martin Lake Oak Hill Mine in east Texas. The conventional haulback or ‘truck shovel’ reclamation method uses haul trucks for the selective ...
Bordeaux Spray For Tip Burn And Early Blight Of Potatoes, 2017 Iowa State College
Bordeaux Spray For Tip Burn And Early Blight Of Potatoes, A. T. Erwin
Tip burn and early blight, the two most common foliage troubles of the potato in Iowa, are of enough economic importance in the corn belt to be dealt with profitably thru the use of the bordeaux spray. Five seasons of spraying experiments at the Iowa Agricultural Experiment station point to that conclusion. These tests also suggest that under Iowa conditions five applications of bordeaux mixture per season are likely to be most profitable. That number gave an average annual crop increase of 20 bushels of potatoes per acre and an average annual increased profit of $9.62 per acre. Three ...
Evergreen Trees For Iowa, 2017 Iowa State College
Evergreen Trees For Iowa, G. B. Macdonald
Evergreens, or coniferous trees, are of great importance in Iowa for shelterbelts and windbreaks, to say nothing of their value for ornamental planting. Altho only a few evergreens are native to Iowa, a large number have been successfully introduced into the state, including several from Europe. The most desirable of these are listed in this bulletin with brief descriptions of their characteristics, their value for various purposes and methods of planting and growing.
A shelterbelt is essential on every farm in Iowa to protect the home buildings and the feed lots. If it is not provided by natural timber, then ...
Preservative Treatment Of Fence Posts, 2017 Iowa State College
Preservative Treatment Of Fence Posts, G. B. Macdonald
One of the big expense bills that the Iowa farmer pays annually is for fence posts. If the 25,000,000 posts required each year for Iowa’s fences were set in one line and spaced a rod apart, they would build a fence three times around the earth at the equator; their cost would be nearly $4,000,000. That bill is so large because wooden posts, which are almost wholly used, are short lived. Yet numerous tests extending over many years made by the Iowa Agricultural Experiment station show that this heavy expense may be cut in two ...
Cold Storage For Iowa Grown Apples., 2017 Iowa State College
Cold Storage For Iowa Grown Apples., Laurenz Greene
In continuing its investigation of cold storage for Iowa grown apples, upon which a partial report was made in September, 1909*, the horticultural section of the Iowa Agricultural Experiment Station has found further evidence that the principal commercial varieties of apples grown in the state may be handled with profit. The four years’ work with many different varieties all gives support to the value of this practice to Iowa apple men.
Since 1909 the Station has also developed many other new facts of importance to Iowa apple growers, not the least of them pertaining to the freezing of apples and ...
Wood Working Industries Of Iowa, 2017 U. S. Forest Service
Wood Working Industries Of Iowa, Hu Maxwell, John T. Harris
The study upon which the report on the Wood-Using Industries of Iowa is based, was conducted by the Forest Service in cooperation with the Iowa Agricultural Experiment Station, the work being done under the direction of O. T. Swan, in charge, office of Wood Utilization, Forest Service, United States Department of Agriculture, and G. B. MacDonald, forester of the Iowa Agricultural Experiment Station. The statistics were compiled from data collected in the spring of 1912 and cover a period of one year from January 1 to December 31, 1911. J. T. Harris of the Forest Service visited all parts of ...