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Full-Text Articles in Engineering

The Next Step Beyond Identifying Field Variability: Integrating Unmanned Aerial Systems Into The Farm Management Workflow, Kevin A. Adkins, Christen C. Bailey, Aspen E. Taylor Apr 2018

The Next Step Beyond Identifying Field Variability: Integrating Unmanned Aerial Systems Into The Farm Management Workflow, Kevin A. Adkins, Christen C. Bailey, Aspen E. Taylor

Kevin A. Adkins, PhD

Precision agriculture strives to manage variations in the field in order to increase yield while adapting input factors to preserve resources and decrease production costs. Unmanned aerial systems (UAS) are advancing precision agriculture by allowing for nondestructive and convenient, as well as cost and time efficient mapping of spatial variation in fields with higher spatial resolution than previous methods. However, while there is much anticipation regarding the potential role for UAS in precision agriculture, their role still requires additional application-based testing. The objective of this work was to explore how growers best integrate the UAS product into their farm workflow. …


Safety Videos For Major Shop Equipment In Cal Poly Brae Lab 1, Trey Joseph Johnston Mar 2018

Safety Videos For Major Shop Equipment In Cal Poly Brae Lab 1, Trey Joseph Johnston

Agricultural Education and Communication

At California Polytechnic State University, San Luis Obispo, students from all majors can take a variety of classes in the BioResource and Agriculture Engineering Department (BRAE). It is essential for future high school mechanics educators to learn the basic shop tools and the importance of safety in the laboratory. In shop 1 of the BRAE Department, there are many different tools students will find in a mechanics classroom. The five main power tools are the Table Saw, Drill Press, Bench Grinder, Radial Arm Saw, and Disk/Belt Sander.

In BRAE 121 Agricultural Mechanics, students learn basic shop skills about lab safety …


Assessing Intra-Event Phosphorus Dynamics In Drainage Water Using Phosphate Stable Oxygen Isotopes, William Ford Iii, Mark R. Williams, Megan B. Young, Kevin W. King, Eric Fischer Jan 2018

Assessing Intra-Event Phosphorus Dynamics In Drainage Water Using Phosphate Stable Oxygen Isotopes, William Ford Iii, Mark R. Williams, Megan B. Young, Kevin W. King, Eric Fischer

Biosystems and Agricultural Engineering Faculty Publications

Quantifying fluxes and pathways of dissolved reactive phosphorus (DRP) in tile-drained landscapes has been hampered by a lack of measurements that are sensitive to P fate and transport processes. One potential tool to help understand these dynamics is the oxygen isotope signature of phosphate (δ18OPO4); however, its potential benefits and limitations are not well understood for intra-event dynamics at the field scale. The objectives of this study were to quantify intra-event variability of δ18OPO4 signatures in tile drainage water and assess the efficacy of δ18OPO4 to elucidate mechanisms and flow …