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Bioresource and Agricultural Engineering

Selected Works

1995

Articles 1 - 3 of 3

Full-Text Articles in Life Sciences

Technical Notes: Bidirectional Serial-To-Parallel Converter For Data Acquisition And Control, Stuart J. Birrell, Scott T. Drummond, Kenneth A. Sudduth Jan 1995

Technical Notes: Bidirectional Serial-To-Parallel Converter For Data Acquisition And Control, Stuart J. Birrell, Scott T. Drummond, Kenneth A. Sudduth

Stuart J. Birrell

A bidirectional serial-to-parallel converter was created to allow collection of serial data through the parallel port on a portable laptop computer. The converter consisted of both hardware conversion circuitry and control software. The converter supported both input and output at a variety of transmission formats and adjustable transmission rates. The control software made use of the various I/O registers of the parallel port to collect data and control the hardware circuitry.


Crop Yield Mapping: Comparison Of Yield Monitors And Mapping Techniques, Stuart J. Birrell, Steven C. Borgelt, Kenneth A. Sudduth Jan 1995

Crop Yield Mapping: Comparison Of Yield Monitors And Mapping Techniques, Stuart J. Birrell, Steven C. Borgelt, Kenneth A. Sudduth

Stuart J. Birrell

Although the variability in soil nutrients and crop yields has been well documented since the turn of the century (Robinson & Lloyd, 1915; Fairfield Smith, 1938), the mechanization of agriculture and the trend to larger implements has led to larger areas being treated as a single unit. Recent advances, however, in machine technology and improvements in data management have made it possible to reverse this trend by implementing site specific crop management (Goering, 1993).


Comparison Of Variable Rate To Single Rate Nitrogen Fertilizer Application: Corn Production And Residual Soil No3-N, N. R. Kitchen, D. F. Hughes, K. A. Sudduth, Stuart J. Birrell Jan 1995

Comparison Of Variable Rate To Single Rate Nitrogen Fertilizer Application: Corn Production And Residual Soil No3-N, N. R. Kitchen, D. F. Hughes, K. A. Sudduth, Stuart J. Birrell

Stuart J. Birrell

The questions most often asked by farmers when discussing variable rate (VR) fertilizer inputs are "How much will it cost?" and "How will it affect my yields?" Many farmers and custom application services share a reluctance to invest in the time and technology required for variable fertilizer application since studies to answer these questions are few and results have been inconsistent.