Resources - UNL Extension Publications

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Agricultural Sprayer Automatic Section Control (ASC) Systems - EC 718 (2 MB; 6 pages)
These systems utilize GPS to reduce over-application of chemicals in the field. Boom sections are turned off over previously treated areas or in "no spray zones" determined by the operator. Substantial savings can be realized, especially in irregularly shaped fields.

Best Management Practices for Collecting Accurate Yield Data and Avoiding Errors During Harvest - EC 2004 (1.8 MB; 6 pages)
Collecting accurate yield monitor data is critical for producers who plan to adopt site-specific crop management strategies for their operations. This publication, part of the precision agriculture series, explains basic information to be used by the combine operator during harvest to improve the quality of yield data collected during harvest.

Site-Specific Nitrogen Management for Irrigated Corn - EC 163 (466 KB; 8 pages)
Describes several approaches to site-specific nitrogen management including data collection, soil sampling and nitrogen recommendations as well as a history and economic analysis of the practice.

Weed Targeting Herbicide Management - EC708 (358 KB; 6 pages)
Site-specific weed management and herbicide application is an effective way to minimize herbicide costs, maximize weed control and prevent unnecessary environmental waste. This publication, part of the precision agriculture series, explains basic principles of site-specific weed control.

Satellite-Based Auto-Guidance - EC706 (873 KB; 6 pages)
Satellite-based auto-guidance systems can provide significant benefits for the crop production industry. Improved equipment make it possible to use satellite-based auto guidance in diverse growing environments.

Listening to the Story Told by Yield Maps - EC704 (362KB; 8 pages)
Yield mapping refers to the process of collecting georeferenced data on crop yield and characteristics, such as moisture content, while the crop is being harvested. This EC explains more about how to acquire and use this precision agriculture tool.

Applications of Remote Sensing in Site-Specific Management - EC702 (165 KB; 6 pages)
Remote sensing is another tool the precision agriculture specialist uses to collect data. This EC talks about aerial, satellite, imagery data sources, and other elements.

On-the-Go Vehicle-Based Soil Sensors - EC178 (181 KB; 4 pages)
Sensors can measure a variety of essential soil properties. These sensors can be used to control variable rate application equipment in real-time or in conjunction with a Global Posititioning System to generate field maps of particular soil properties.

Untangling the GPS Data String - EC157 (169 KB; 4 pages)
Illustrates a way to convert GPS receiver output into linear units for georeferenced data analysis.

Soil Sampling for Precision Agriculture - EC154 (154 KB; 4 pages)
Provides direction on how to implement a soil sampling program for precision agriculture.

Site-Specific Management of Soil pH (FAQ) - EC705 (289 KB; 6 pages)
Addresses several frequently asked questions related to the meaning of soil pH, lime requirement, and quality of data used to prescribe site-specific management of soil pH.