H. Mark Hanna
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View article: Buried pipeline installation impacts on soil structure and crop root decomposition
Buried pipeline installation impacts on soil structure and crop root decomposition Open
The severe manipulation of soil that occurs in the right‐of‐way (ROW) easement areas for pipeline installation leads to soil degradation and yield loss. The objectives of this study were to investigate the use of the Visual Evaluation of S…
View article: Dynamics of corn dry matter content and grain quality after physiological maturity
Dynamics of corn dry matter content and grain quality after physiological maturity Open
Delayed corn ( Zea mays L.) harvest after physiological maturity (PM) is a universal practice in the U.S. Corn Belt to reduce grain drying cost. However, corn yield is speculated to be lost due to kernel dry matter loss from seed respirati…
View article: Safe Farm: Use tractors with ROPS to save lives
Safe Farm: Use tractors with ROPS to save lives Open
Tractors are common to all farm operations. They also are the major cause of death in agriculture today. Tractors are linked to more than half of farm-related deaths, both nationally and in Iowa. The National Safety Council estimates more …
View article: Solar photovoltaic energy for agricultural operations
Solar photovoltaic energy for agricultural operations Open
The popularity of generating electricity from solar photovoltaic (PV) arrays is growing. Iowa is in the top third of states for harnessing energy from the sun. A combination of new technology, significantly increased production of arrays, …
View article: Energy Use for Field Operations, Crop Drying, and Swine Housing on University Farms
Energy Use for Field Operations, Crop Drying, and Swine Housing on University Farms Open
Energy is an input cost to agricultural production. Knowing typical values can help farmers evaluate management options. Diesel, propane, and electrical energy used on the farm during selected field operations, crop drying, and in swine ho…
View article: Spray Volume is Critical for Postemergence Herbicides
Spray Volume is Critical for Postemergence Herbicides Open
Proper herbicide application is critical to ensure products achieve their full potential for weed control. For postemergence herbicides, this includes application to appropriately sized weeds and equipping the sprayer to achieve uniform co…
View article: Selecting Nozzles for Postemergence Herbicides
Selecting Nozzles for Postemergence Herbicides Open
An earlier ICM News article discussing affects of nozzle type and size on spray coverage prompted a question from a farmer regarding nozzle selection. In recent years there have been many advances in nozzle design. The primary improvement …
View article: Making sure planter technology accomplishes the basics
Making sure planter technology accomplishes the basics Open
Checking field conditions to make optimal planter adjustments such as the amount of down force on depth-gauge wheels is required for both automated and manual systems. Operator manuals include the importance of evaluating field conditions …
View article: The SpotOnTM Sprayer Calibrator, a Digital Flow Meter: Accuracy Evaluation and Use in Pesticide Safety Education Programs
The SpotOnTM Sprayer Calibrator, a Digital Flow Meter: Accuracy Evaluation and Use in Pesticide Safety Education Programs Open
Six independent tests were conducted to evaluate the accuracy of the SpotOnTM Sprayer Calibrator, a digital flow meter produced by Innoquest. The results are presented in this article. The authors also discuss the pros and cons of using th…
View article: Diesel Fuel Consumption during Tractor Operations
Diesel Fuel Consumption during Tractor Operations Open
Direct energy expenses (diesel, gasoline, propane, electricity) total more than $1 billion annually for Iowa’s farmers. Day-to-day farm management techniques such as adjusting tractor gear and throttle settings, making use of front-wheel-d…