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Full-Text Articles in Engineering

Post-Harvest Management Of Immature Corn And Soybeans, Bill Wilcke Nov 1995

Post-Harvest Management Of Immature Corn And Soybeans, Bill Wilcke

Proceedings of the Integrated Crop Management Conference

In years when the growing season is shortened by late planting and/or early frost, some com and soybean seeds are still immature when the plant is killed by frost. Immature crops generally have high moisture at harvest and contain high concentrations of broken seeds (fines) and foreign material. In addition, immature com usually has low test weight and immature soybeans often contain green-colored seeds. This article will cover drying and storage management of these low quality, immature crops.


Managing Infiltration To Avoid Water Quality Problems, James L. Baker Nov 1995

Managing Infiltration To Avoid Water Quality Problems, James L. Baker

Proceedings of the Integrated Crop Management Conference

Recent newspaper headlines in the Des Moines Register (e.g., October 19, 1994: "Water is laced with pesticides report finds- 14 million affected" and July 14, 1995: "River boosted drinking water nitrate levels - farm fertilizer suspected") illustrate some of the water quality concerns that exist for the off-site movement of pesticides and nutrients from treated fields to water resources. The major water quality concerns from pesticides relate to the possible impact on human health when found in surface and groundwater, and on the health of the aquatic ecosystem when found in surface waters. The major water quality concerns from nutrients ...


High Speed Row Crop Management, Mark Hanna, Robert Hartzler, Don Erbach, Kevin Paarlberg Nov 1995

High Speed Row Crop Management, Mark Hanna, Robert Hartzler, Don Erbach, Kevin Paarlberg

Proceedings of the Integrated Crop Management Conference

Using herbicides for weed management is a popular strategy for Iowa row crop producers. Over 95% of row crop acres receive a herbicide application. Cultivation, a mechanical weed management strategy, also remains popular. A 1989 survey indicated that 85% of com and soybean acres were cultivated at least once. Although cultivated acreage may have decreased recently from this level due to cultural practices (e.g. drilled soybeans), many Iowa producers use cultivation as a part of their overall management strategy.


Tillage And Herbicide Incorporation Effects On Runoff Losses, S. K. Mickelson, J. L. Baker Nov 1995

Tillage And Herbicide Incorporation Effects On Runoff Losses, S. K. Mickelson, J. L. Baker

Proceedings of the Integrated Crop Management Conference

The 1995 Food Security Act required producers with highly erodible land to develop erosion control plans to be eligible for farm program benefits. Conservation tillage was a part of many of those plans; however, mechanical incorporation of herbicides to reduce runoff losses can be a problem while trying to maintain crop residue. Soil, water, and herbicide losses (with water and sediment) were measured from continuous com runoff plots (1.7 x 12.0 m) in 1993 and 1994 under natural rainfall conditions. Four tillage/herbicide application treatments were studied: notill/herbicide broadcast sprayed (NT); fall chisel plow-spring disk/herbicide broadcast ...


Using Farm Moisture Testers, Charles R. Hurburgh Jr. Oct 1995

Using Farm Moisture Testers, Charles R. Hurburgh Jr.

Agriculture and Environment Extension Publications

Accurate moisture tests are important in managing and marketing grain.


Safe Farm: The Worker Protection Standard: Rules To Improve Pesticide Safety, Wendy Wintersteen, Joyce Hornstein, Laura J. Miller Sep 1995

Safe Farm: The Worker Protection Standard: Rules To Improve Pesticide Safety, Wendy Wintersteen, Joyce Hornstein, Laura J. Miller

Agriculture and Environment Extension Publications

Learn how the Environmental Protection Agency's Worker Protection Standard applies to farmers.


Drainage And Water Quality In Great Lakes And Cornbelt States, Norman R. Fausey, Larry C. Brown, Harold W. Belcher, Ramesh S. Kanwar Jul 1995

Drainage And Water Quality In Great Lakes And Cornbelt States, Norman R. Fausey, Larry C. Brown, Harold W. Belcher, Ramesh S. Kanwar

Agricultural and Biosystems Engineering Publications

The soils and the climate of the Great Lakes and Cornbelt states dictate that drainage is required to carry out economically viable farming activities. When drained, the soils are very productive and this eight-state region accounts for nearly 80% of the agricultural production of the United States. Drainage played an important role in the development of the region and a historical perspective is included to indicate the impetus for drainage and the amount of drainage application. Research results of agricultural drainage effects on water quality indicate that agricultural subsurface drainage has both positive and negative impacts; i.e., reduction in ...


Searching For Sustainable Use Of Montana’S Water: A Series Of Vignettes, Matthew Mckinney Jun 1995

Searching For Sustainable Use Of Montana’S Water: A Series Of Vignettes, Matthew Mckinney

Sustainable Use of the West's Water (Summer Conference, June 12-14)

24 pages.

Contains references.


Regional Water Planning In New Mexico: An Opportunity For Citizen Involvement In State Government, Lucy Moore Jun 1995

Regional Water Planning In New Mexico: An Opportunity For Citizen Involvement In State Government, Lucy Moore

Sustainable Use of the West's Water (Summer Conference, June 12-14)

12 pages.

Contains references.


The Oregon Watershed Health Program: Local Empowerment To Restore Watersheds, Mary Lou Soscia Jun 1995

The Oregon Watershed Health Program: Local Empowerment To Restore Watersheds, Mary Lou Soscia

Sustainable Use of the West's Water (Summer Conference, June 12-14)

9 pages.


Washington State Initiatives For Sustainable Water Use, Kenneth O. Slattery Jun 1995

Washington State Initiatives For Sustainable Water Use, Kenneth O. Slattery

Sustainable Use of the West's Water (Summer Conference, June 12-14)

8 pages.


A Response To Kansas V. Colorado: Sustainable Use Of The Arkansas River, David L. Harrison Jun 1995

A Response To Kansas V. Colorado: Sustainable Use Of The Arkansas River, David L. Harrison

Sustainable Use of the West's Water (Summer Conference, June 12-14)

17 pages (includes 1 folded map).


Sustainable Use Of The Denver Basin, Charles B. White Jun 1995

Sustainable Use Of The Denver Basin, Charles B. White

Sustainable Use of the West's Water (Summer Conference, June 12-14)

20 pages.

Contains footnotes.


Agenda: Sustainable Use Of The West's Water, University Of Colorado Boulder. Natural Resources Law Center Jun 1995

Agenda: Sustainable Use Of The West's Water, University Of Colorado Boulder. Natural Resources Law Center

Sustainable Use of the West's Water (Summer Conference, June 12-14)

Conference organizers and/or faculty included University of Colorado School of Law professors David H. Getches, Lawrence J. MacDonnell, Teresa A. Rice, Elizabeth A. Rieke and Charles F. Wilkinson.

Sustainable development is on the policy agenda for the '90s. What does sustainability mean? Is it a realistic concept? Are water rights compatible with sustainable use? The Center's 16th annual summer conference will explore the meaning of sustainability in the context of the West's demands, development, and natural values. Presentations by leading experts will address the broad concept of sustainable development, with a particular look at Arizona's experience ...


Sustainability: Myth And Reality, Kai Lee Jun 1995

Sustainability: Myth And Reality, Kai Lee

Sustainable Use of the West's Water (Summer Conference, June 12-14)

23 pages (includes illustrations).

Contains references.


Is Sustainable Agriculture Possible In The Arid West?: The Example Of The Ogallala Aquifer, John Opie Jun 1995

Is Sustainable Agriculture Possible In The Arid West?: The Example Of The Ogallala Aquifer, John Opie

Sustainable Use of the West's Water (Summer Conference, June 12-14)

16 pages.

Contains 2 pages of references.


Arizona Water Management: New Problems And New Solutions, Herb Dishlip Jun 1995

Arizona Water Management: New Problems And New Solutions, Herb Dishlip

Sustainable Use of the West's Water (Summer Conference, June 12-14)

12 pages.


Agriculture’S Cap Experience: Sustainability For Whom?, Paul N. Wilson Jun 1995

Agriculture’S Cap Experience: Sustainability For Whom?, Paul N. Wilson

Sustainable Use of the West's Water (Summer Conference, June 12-14)

23 pages.

Contains endnotes and references.


Acoustic And Video Imaging System For Quality Determination Of Pharmaceutical Products, Manjit K. Misra, Yuh Yuan Shyy Jun 1995

Acoustic And Video Imaging System For Quality Determination Of Pharmaceutical Products, Manjit K. Misra, Yuh Yuan Shyy

Iowa State University Patents

A flexible system for determining the quality of pharmaceutical products based on characteristics such as, for example, mass, shape, hardness, size, color and surface texture is disclosed herein. The quality determination apparatus includes a feeder assembly for sequentially dropping individual product samples upon an impact transducer arrangement. The impact transducer generates transducer signals indicative of the physical characteristics of each product sample. In addition, an imaging device operates to synthesize a digital image representation of each product sample. The transducer signal and digital image representation corresponding to each product are analyzed so as to determine the appropriate degree of quality ...


Livestock Industry Facilities And Environment: Environmental Guidelines For Confinement Swine Housing, Jay D. Harmon, Hongwei Xin Feb 1995

Livestock Industry Facilities And Environment: Environmental Guidelines For Confinement Swine Housing, Jay D. Harmon, Hongwei Xin

Agriculture and Environment Extension Publications

No abstract provided.


Livestock Industry Facilities And Environment: Health Hazards In Swine Confinement Housing: How Bad Is It?, Jay D. Harmon, Hongwei Xin Feb 1995

Livestock Industry Facilities And Environment: Health Hazards In Swine Confinement Housing: How Bad Is It?, Jay D. Harmon, Hongwei Xin

Agriculture and Environment Extension Publications

No abstract provided.


Effectiveness Of Vegetative Filter Strips In Controlling Losses Of Surface-Applied Poultry Litter Constituents, Indrajeet Chaubey, Dwayne R. Edwards, Tommy C. Daniel, Philip A. Moore Jr., D. Jeff Nichols Jan 1995

Effectiveness Of Vegetative Filter Strips In Controlling Losses Of Surface-Applied Poultry Litter Constituents, Indrajeet Chaubey, Dwayne R. Edwards, Tommy C. Daniel, Philip A. Moore Jr., D. Jeff Nichols

Biosystems and Agricultural Engineering Faculty Publications

Vegetative filter strips (VFS) have been shown to have high potential for reducing nonpoint source pollution from cultivated agricultural source areas, but information from uncultivated source areas amended with poultry litter is limited. Simulated rainfall was used in analyzing effects of VFS length (0, 3.1, 6.1, 9.2, 15.2, and 21.4 m) on quality of runoff from fescue (Festuca arundinacea Schreb.) plots (1.5 x 24.4 m) amended with poultry litter (5 Mg/ha). The VFS reduced mass transport of ammonia-nitrogen (NH3-N), total Kjeldahl nitrogen (TKN), ortho-phosphorus (PO4-P), total phosphorus (TP ...


Atrazine And Alachlor Dissipation Rates From Field Experiments, Stephen R. Workman, Andrew D. Ward, Norman R. Fausey, Sue E. Nokes Jan 1995

Atrazine And Alachlor Dissipation Rates From Field Experiments, Stephen R. Workman, Andrew D. Ward, Norman R. Fausey, Sue E. Nokes

Biosystems and Agricultural Engineering Faculty Publications

Chemical transport is being monitored in the root zone of three agricultural management systems at the Ohio Management Systems Evaluation Area (OMSEA). Atrazine and alachlor concentration data from soil cores taken to a depth of 0.9 m and partitioned into the increments of 0.0 to 0.15, 0.15 to 0.3, 0.45 to 0.6, and 0.75 to 0.9 m show the herbicides remained in the top 0.15 m of the profile during the 1991 and 1992 growing seasons. The slow movement of herbicides was partly due to below normal rainfall during the ...


Crop And Tillage Management Effects On Water Flow And Nitrate-Nitrogen Loss Through Subsurface Drains , David L. Bjorneberg Jan 1995

Crop And Tillage Management Effects On Water Flow And Nitrate-Nitrogen Loss Through Subsurface Drains , David L. Bjorneberg

Retrospective Theses and Dissertations

Data were collected from subsurface drains on 36, 0.4-ha plots at Iowa State University's Northeast Research Farm near Nashua, IA to determine crop and tillage management effects on water flow and nitrate-N loss through subsurface drains. From 1990 to 1992, four tillage systems (chisel plow, moldboard plow, ridge till and no-till) were used with two crop rotations (continuous corn (Zea mays L.) and corn-soybean (Glycine max L. (Herr.)) rotation) and a single-spring fertilizer application. From 1993 to 1995, tillage systems were reduced to chisel plow and no-till, while fertilizer management changed to include single-spring fertilizer, spring-summer split fertilizer ...


Effects Of Shallow Water Tables On Soil Aeration, Water Quality, And Physiological Growth Of Soybean , Tahir Sarwar Jan 1995

Effects Of Shallow Water Tables On Soil Aeration, Water Quality, And Physiological Growth Of Soybean , Tahir Sarwar

Retrospective Theses and Dissertations

This study was conducted to investigate the effects shallow water table depths on soil aeration, groundwater quality and on some physiological growth and yield parameters of soybean. The experiments were conducted in two environmentally controlled growth chambers using sixteen lysimeters. Water table (WT) treatments were established on 37 day after planting (DAP), at depths of 0.15-, 0.30-, 0.45- and 0.60-m below the soil surface. Soil aeration status was determined by measuring soil oxygen concentrations at 0.15-, 0.30-, 0.60-m depths in the lysimeters. Effects of water table depths on groundwater quality were determined by ...


Knowledge And Decision Support For Variable Rate Application Of Materials In Prescription Farming , Jack Robert Ambuel Jan 1995

Knowledge And Decision Support For Variable Rate Application Of Materials In Prescription Farming , Jack Robert Ambuel

Retrospective Theses and Dissertations

One major goal of prescription farming is to optimize application rates for seed fertilizer, and other agricultural inputs as a function of location within a field. There are four main components of a variable rate application system: (1) A method of determining the location of farm equipment (e.g. combines, tractors) within a field. (2) A system for controlling the application rate of materials (seeds, fertilizers, pesticides). (3) The capability to measure the results using a real time yield monitor. (4) An algorithm or prescription for determining what rates of materials to apply at each location. In this dissertation it ...


Measuring And Modeling Alachlor Dissipation In Soil , Dee Anna Jo Weed Jan 1995

Measuring And Modeling Alachlor Dissipation In Soil , Dee Anna Jo Weed

Retrospective Theses and Dissertations

Field and laboratory experiments evaluated the overall dissipation of alachlor (2-chloro-N-(2,6-diethylphenyl)-N-(methoxymethyl) acetamide) and the effect of no-till and chisel-plow tillages on alachlor leaching and dissipation. In the top 30-cm layer of field soil, the time to 50% dissipation (half-life) was 2 to 3 d, and the time to 90% dissipation ranged from 17 to 30 d. In no-till soil, alachlor dissipated slightly faster, and more was transported into the 10-to-30-cm soil layer. The tillage effect depended on weather that favored movement into and dissipation within the soil, rather than dissipation on plant residues and the soil ...


Air Cleaning Systems For Livestock Buildings , Atta Elmanan Mustafa Atia Jan 1995

Air Cleaning Systems For Livestock Buildings , Atta Elmanan Mustafa Atia

Retrospective Theses and Dissertations

The objective of this study was to design an ionization system for maximum collection efficiency. The laboratory studies were conducted to test the system and evaluate the performance of the prototypes. Two ionization systems were designed and tested in an air quality laboratory chamber. In the first system a high voltage negative ionization electrode and a neutral collector were used to charge and collect the dust from the air. Samples were obtained with the systems on and off. Samples were also obtained to compare the effectiveness of the second ionization system and an ionization system manufactured by Alpine. Two methods ...


Seed Furrow Sidewall Smearing By Double Disk Openers , Muhammad Iqbal Jan 1995

Seed Furrow Sidewall Smearing By Double Disk Openers , Muhammad Iqbal

Retrospective Theses and Dissertations

Seed furrow sidewall smearing by planter double disk openers in clay loam and loam soils was investigated in field and growth chamber experiments. Treatment variables were row preparation, soil moisture, and planting period. Evaluation parameters were soil bulk density, air permeability, cone index, emergence rate index and total emergence, and plant dry matter weight. The experiments were conducted in somewhat poorly drained soils near Ames, Iowa. The fields were not cultivated before planting and the residue from the previous year's corn was removed. Experiments were conducted in two cropping seasons. Each experiment consisted of a factorial design of three ...


Water Reuse In Fermentations , Tzu-Yin Hsiao Jan 1995

Water Reuse In Fermentations , Tzu-Yin Hsiao

Retrospective Theses and Dissertations

This work was undertaken to investigate the feasibility of reusing the process effluent from fermentation processes to minimize the liquid waste. Two fermentations with different characteristics were chosen as model fermentations for development of principles. The first was a yeast fermentation that requires high levels of carbon substrate for production of intracellular lipid. The second was a bacterial fermentation requiring high levels of nitrogen in the medium for production of lysine. The latter is used for commercial production of lysine;In the study of the first model fermentation, Apiotrichum curvatum, an oleaginous yeast, was used as the working culture. Spent ...