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Full-Text Articles in Life Sciences
The First 50 Years: Agricultural Engineering, Henry H. Delong
The First 50 Years: Agricultural Engineering, Henry H. Delong
Agricultural and Biosystems Engineering Publications
This is a history of the first 50 years (1925-1975) of the Department of Agricultural and Biosystems Engineering at South Dakota State University, including lists of departmental projects and faculty members.
Chapter I: Introduction
Chapter II: The Beginning of Our Department
Chapter III: Progress in the 40's
Chapter IV: The Growth Picture of the 50's
Chapter V: The Expanding 60's
Chapter VI: The Unique Project of Rammed Earth Construction
Chapter VII: Agricultural Extension Work by the Agricultural Engineers
Chapter VIII: Ag Engineers Take Part in Experiment Station
Integrated Numerical Simulation Of Drip Irrigation With Subsurface Drainage, James Ray Hoover
Integrated Numerical Simulation Of Drip Irrigation With Subsurface Drainage, James Ray Hoover
Electronic Theses and Dissertations
A numerical method and model were developed to simulate soil moisture during steady-state and transient flow toward a tile drain. Intermittent application of water by drip irrigation and rainfall were simulated by use of finite difference approximation equations. No known analytical solution for these flow situations exists because of the complex mathematics describing unsaturated flow in the soil. The computer model is based on the electrical resistance network analog. The explicit finite difference equations were solved by the successive over-relaxation method for steady-state flow and by iteration for transient soil moisture flow. The computer program for the model consists of …