Open Access. Powered by Scholars. Published by Universities.®

Agriculture Commons

Open Access. Powered by Scholars. Published by Universities.®

41,926 Full-Text Articles 30,906 Authors 7,355,379 Downloads 206 Institutions

All Articles in Agriculture

Faceted Search

41,926 full-text articles. Page 759 of 767.

Freezing Tolerance In Frontenac And Seyval Blanc Grapevines, Lee H. T. Goldsmith, Gail R. Nonnecke, Paul A. Domoto, Rajeev Arora 2010 Iowa State University

Freezing Tolerance In Frontenac And Seyval Blanc Grapevines, Lee H. T. Goldsmith, Gail R. Nonnecke, Paul A. Domoto, Rajeev Arora

Iowa State Research Farm Progress Reports

Grape cultivars that are grown in cold climates must be able to tolerate low winter temperatures that typically occur in a given region. Cold hardiness of grapevines is based on primary bud survival, however, many interspecific cultivars can produce a crop on secondary buds if primary buds are injured. Moreover, cane tissues, which are necessary for secondary crop production, can be as susceptible to freezing injury as secondary buds. There is relatively little information concerning the freezing tolerance of cane tissues during the overwintering period, although high freezing tolerance of cane tissues is important where severe freezing events can be ...


Fungicide Evaluation In Washington Creeping Bentgrass At Greens Height, Mark L. Gleason, Brady S. North, Jean C. Batzer 2010 Iowa State University

Fungicide Evaluation In Washington Creeping Bentgrass At Greens Height, Mark L. Gleason, Brady S. North, Jean C. Batzer

Iowa State Research Farm Progress Reports

Fungicide evaluations for control of brown spot in greens height creeping bentgrass were conducted at Veenker Memorial Golf Course, Ames, IA.


Quantifying Species Interactions In Experimental Native Vs. Exotic Grassland Plant Communities, Forest I. Isbell, Brian J. Wilsey 2010 Iowa State University

Quantifying Species Interactions In Experimental Native Vs. Exotic Grassland Plant Communities, Forest I. Isbell, Brian J. Wilsey

Iowa State Research Farm Progress Reports

Native ecosystems are currently being replaced by novel, exotic-dominated ecosystems worldwide. Exotic ecosystems differ from native ecosystems in several important ways. For example, exotic ecosystems are often less diverse than native ecosystems, and often contain species without a shared evolutionary history. Previously we found that biodiversity rapidly declined in experimental exotic communities because the mechanisms that maintained diversity in experimental native communities were reduced. Further investigation is needed to explicitly quantify species interactions in native vs. exotic communities. Here we test the hypothesis that exotic species will exhibit more competition, or less facilitation, than ecologically similar native species.


Corn Plant Populations, 2007 Through 2009, Mark A. Licht 2010 Iowa State University

Corn Plant Populations, 2007 Through 2009, Mark A. Licht

Iowa State Research Farm Progress Reports

Corn hybrid genetics change yearly to increase productivity. The newer hybrids appear to possess plant characteristics that allow for higher plant populations. Over the past several years, several field trials across the state have found support for higher plant populations in corn. This trial was designed to collect information to aid in local recommendations. Additionally, this data will be combined into a larger data set of similar trials for statewide recommendations.


Soybean Plant Density Effect On Oil Composition In Low-Linolenic Soybean Cultivars, Palle Pedersen, Jason De Bruin, Jeff Butler 2010 Iowa State University

Soybean Plant Density Effect On Oil Composition In Low-Linolenic Soybean Cultivars, Palle Pedersen, Jason De Bruin, Jeff Butler

Iowa State Research Farm Progress Reports

Increased demand for soybean with modified oil composition has led to the development of new soybean cultivars with reduced levels of linolenic fatty acids. Plant density effects on soybean oil and protein content have been documented. However, little information is available for producers regarding management for growing low-linolenic soybean. The objective of this study was to determine the effect of plant density on linolenic acid of soybean bred to have reduced linolenic acid content (≤ 3%, low-linolenic) and of traditional soybean cultivars (≈ 7%, high-linolenic).


Apple Imprinting, Brandon H. Carpenter, Gail R. Nonnecke, Lynn R. Schroeder, Dennis N. Portz 2010 Iowa State University

Apple Imprinting, Brandon H. Carpenter, Gail R. Nonnecke, Lynn R. Schroeder, Dennis N. Portz

Iowa State Research Farm Progress Reports

Anthocyanin is the pigment that develops in the skin of apples and produces the red color associated with some apple cultivars. Apples are dependent on light to develop anthocyanins. This is the reason why some apples develop leaf-like shapes in their pigment on the skin; the leaf excludes the light in its shape and the red color pigment doesn’t develop. Apple imprinting is a lightmanipulation technique used to produce an intentional design on the skin of apples. This technique is used in Japan where fruit can be a prized gift, and apples imprinted with special logos can bring a ...


Northeast Research Farm Summary, Kenneth T. Pecinovsky 2010 Iowa State University

Northeast Research Farm Summary, Kenneth T. Pecinovsky

Iowa State Research Farm Progress Reports

Includes:

Farm and Weather Summary


Evaluation Of Smartstax, Vt Triple Pro, And Herculex Xtra, Aaron J. Gassmann, Patrick J. Weber 2010 Iowa State University

Evaluation Of Smartstax, Vt Triple Pro, And Herculex Xtra, Aaron J. Gassmann, Patrick J. Weber

Iowa State Research Farm Progress Reports

The purpose of this study was to evaluate Smartstax corn (Dekalb DKC 61-21) compared with VT Triple, VT Triple Pro, Herculex XTRA, and a non-Bt near isoline. Data were collected on injury from corn rootworm and corn earworm.


Tenacity Turf Safety For Postemergence Applications, Christopher Blume, Nick E. Christians 2010 Iowa State University

Tenacity Turf Safety For Postemergence Applications, Christopher Blume, Nick E. Christians

Iowa State Research Farm Progress Reports

The objectives of this study were to determine turf safety with Tenacity using a boom application versus a handheld application gun. Turf safety was to be determined on both perennial ryegrass and tall fescue at one, two, and three times the labeled rate for each species, respectively, applied two times (21 days apart) during the growing season.


Update On Soybean Rust In Iowa, Daren S. Mueller 2010 Iowa State University

Update On Soybean Rust In Iowa, Daren S. Mueller

Iowa State Research Farm Progress Reports

Similar to the past several years, soybean rust was not a threat for Iowa soybean growers. This year did have a couple of interesting developments, neither affecting Iowa soybeans. First, soybean rust was found in nearly 575 counties, including most (or all) of the counties in Arkansas, Louisiana, Mississippi, Alabama, and Georgia. Soybean rust was found in 16 states; the furthest north was in Illinois. This is the most counties with rust to date. As a comparison, soybean rust was found in 392 counties in 2008.


Fungicide Evaluation In Penncross Creeping Bentgrass At Fairway Height, Mark L. Gleason, Brady S. North, Jean C. Batzer 2010 Iowa State University

Fungicide Evaluation In Penncross Creeping Bentgrass At Fairway Height, Mark L. Gleason, Brady S. North, Jean C. Batzer

Iowa State Research Farm Progress Reports

Fungicide evaluations for control of dollar spot and brown spot in fairway height creeping bentgrass were conducted at the Iowa State University Horticulture Station, Ames, IA.


2009 Home Demonstration Gardens, Cynthia L. Haynes 2010 Iowa State University

2009 Home Demonstration Gardens, Cynthia L. Haynes

Iowa State Research Farm Progress Reports

Vegetable gardening is increasingly popular in today’s economy, especially since there is the potential to save money by growing food at home. One of the themes for the 2009 Home Demonstration Garden was vegetables that have the potential to reduce grocery bills. Certain vegetables such as potatoes, winter squash, onions, tomatoes, beans, and beets can be stored or processed, allowing them to be kept long after harvest. Other themes featured in the 2009 Home Demonstration Garden were white pumpkins, annual grasses, and new or unusual flowers.


Southeast Research Farm Summary, Kevin Van Dee 2010 Iowa State University

Southeast Research Farm Summary, Kevin Van Dee

Iowa State Research Farm Progress Reports

Includes:

Farm and Weather Summary


Experimental Wine Making, Murli R. Dharmadhikari, Sebastian Donner, Jennifer Hansen 2010 Iowa State University

Experimental Wine Making, Murli R. Dharmadhikari, Sebastian Donner, Jennifer Hansen

Iowa State Research Farm Progress Reports

The substantial growth of the Iowa grape and wine industry over the past decade resulted in the establishment of the Midwest Grape and Wine Industry Institute to investigate various cold climate grape cultivars and their potential for wine making. Unfortunately, due to the climate encountered in Iowa, we are not able to simply adopt wine making practices used in other parts of the world to achieve the best quality wines possible for our region. The project described herein focused on the production of small batches of experimental wine to evaluate cold climate cultivars and the impact of conditions on the ...


Sugar Beet Demonstration Plantings, Vincent Lawson 2010 Iowa State University

Sugar Beet Demonstration Plantings, Vincent Lawson

Iowa State Research Farm Progress Reports

This project investigated field production of a potential biofuel crop–sugar beet. Objectives included becoming familiar with cultural methods for growing sugar beet and determining expected yield levels for southeast Iowa. To accomplish this, half-acre trial plots were planted at the Muscatine Island Research Farm (MIRF), Fruitland and at the Southeast Research Farm (SERF), Crawfordsville, in 2008 and 2009. The two sites provided different soil types and growing environments to investigate the crop. Results from both years and locations demonstrate that sugar beets can be grown in southeast Iowa, and with good management and weather conditions, yields should equal or ...


Phosphorus Fertilization Strategies For Alfalfa Hay Production Followed By Corn Harvested For Grain, Antonio P. Mallarino, David Rueber 2010 Iowa State University

Phosphorus Fertilization Strategies For Alfalfa Hay Production Followed By Corn Harvested For Grain, Antonio P. Mallarino, David Rueber

Iowa State Research Farm Progress Reports

A long-term experiment was conducted to evaluate phosphorus (P) fertilization strategies for alfalfa grown for hay and followed by corn harvested for grain.Alfalfa has greater P requirements than corn, and this is recognized in the ISU Extension publication PM-1688. The guidelines are based on previous research with pure alfalfa or alfalfa-grass mixtures. The information available is about 30 years old; however, there is insufficient information about alternative strategies for distributing P fertilization rates during the alfalfa crop years and for a following corn crop. This study evaluated several combinations of initial and top-dressed P fertilization rates for alfalfa and ...


Crop Yields And Phosphorus Loss With Surface Runoff As Affected By Tillage Systems And Phosphorus Sources, Antonio P. Mallarino, Mazhar Ul Haq, Matthew J. Helmers, Ryan Rusk 2010 Iowa State University

Crop Yields And Phosphorus Loss With Surface Runoff As Affected By Tillage Systems And Phosphorus Sources, Antonio P. Mallarino, Mazhar Ul Haq, Matthew J. Helmers, Ryan Rusk

Iowa State Research Farm Progress Reports

Excess sediment, phosphorus (P) and/or nitrogen (N) impair many Iowa lakes and streams. Most of the sediment and P originate from fields and stream banks. Previous research was based on rainfall simulations. This technique provided useful information about potential differences between management practices, but estimated poorly long-term differences and total losses. Little work has been conducted elsewhere in Iowa to study P loss with surface runoff based on natural rainfall and large-scale plots. Therefore, a long-term study was established to investigate effects of corn and soybean production, tillage, and fertilizer or manure P management system on crop yield and ...


Twin Row Vs. Single Row Spacing At Variable Seeding Rates, Stephanie Marlay, Roger W. Elmore, Lori Abendroth 2010 Iowa State University

Twin Row Vs. Single Row Spacing At Variable Seeding Rates, Stephanie Marlay, Roger W. Elmore, Lori Abendroth

Iowa State Research Farm Progress Reports

As corn production practices improve, row widths decrease. Although most producers plant in 30-in. rows, more and more acres are being planted to narrower row widths (15 in. to 20 in.). In addition, plant populations continue to increase every year with the introduction of more stress-tolerant hybrids. Wider row widths force more plants into a concentrated area, whereas narrower rows allow more equidistant spacing of plants.


Western Research Farm Summary, Wayne B. Roush 2010 Iowa State University

Western Research Farm Summary, Wayne B. Roush

Iowa State Research Farm Progress Reports

Includes:

Farm Summary


Role Of Directly Connected Macropores On Pathogen Transport To Subsurface Drainage Water, Chi Kim Hoang, Carl H. Pederson, Rameshwar S. Kanwar, Garey Fox 2010 Iowa State University

Role Of Directly Connected Macropores On Pathogen Transport To Subsurface Drainage Water, Chi Kim Hoang, Carl H. Pederson, Rameshwar S. Kanwar, Garey Fox

Iowa State Research Farm Progress Reports

Pathogen contamination of water supplies is now considered one of the top water quality issues in the United States and worldwide. Continual application of livestock manure may contribute to nonpoint source pollution by releasing microbial pathogens including bacteria, virus, and protozoa, through runoff and subsurface drainage water to surface and ground water. Many studies have been conducted in the laboratories and fields to understand the preferential flow through macropores. But no experiments in the field have been conducted to examine the breakthrough curve of pathogen and/or Escherichia coliform (E.coli) with directly connected macropores. The objective of this research ...


Digital Commons powered by bepress