Soil and Topography Information

University and Research Institutions

Soil is not uniform at the field or plot scale. Therefore, without being adequately characterized both with respect to attributes as well as their independent spatial distribution, soil cannot be assumed to be a ‘control’ in research studies. The paradigm for in-field applied research has been to ‘average’ results, whether relating to yield, quality, disease, etc., across what is often significant soil variability. This is the primary cause of most of the relatively low correlation metrics in these research studies.

It doesn’t have to be that way! The dozens of independent soil and topographic attributes generated by Soil and Topography Information’s SIS (Soil Information System) can be used to either normalize and/or segment data in ways that are relevant to a particular study. For example, STI has been able to segment out for better analysis those soil attributes that correlated to specific grape quality characteristics. STI has also ‘sharpened’ the statistical analysis associated with understanding how drought tolerant crops perform in plots that cut across soils with varying water holding capacities.

Ideally, the information provided by STI can be used to set up plot boundaries so that the soil can truly serve as a control and thus improve statistical analysis, make more sense of the results, and therefore improve the practical application of what is learned.

STI has established working relationships with lead researchers at Cal  Poly, Cal State Fresno, and UC Davis, to provide STI soil data for selected fields used in academic research.  The addition of STI soil data will enable research to be conducted on larger fields and reduce unknown variables – generating stronger data sets and improving the quality of research.

The SIS is a key and essential element of the fourth revolution in agriculture; namely precision management. The previous three revolutions being mechanization, fertilization and hybridization/genetic engineering. Precision management, which "puts it all together", will optimize progress from the previous three revolutions and must begin with precision soil information; because the soil is a source of massive variability with inadequate consideration in management decisions, so that it truly is the "final frontier" in agriculture. Without the SIS, precision agriculture will remain a novelty and never achieve it's tremendous potential to increase productivity and profitability while decreasing environmental contamination.
- Dr. John Norman, University of Wisconsin - Madison

STI University Partners


Our partnership with the Viticulture and Enology Research Center will allow the joint team to evaluate the relationships between the soil characteristics and measurements such as pruning weights, crop load, and fruit quality.


STI is mapping vineyards and performing field demonstrations on campus for the purpose of educating the next generation of industry experts. STI information products will become part of the regular curriculum.


STI is working with UC Davis to analyze relationships between crop yield and quality characteristics as they relate to various soil properties as defined by the SIS.

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The Future of Growing

"STI represents the future of wine grape growing. The information provided by STI allows growers to maximize the productivity of their vineyards."
-Gary Patterson, General Manager
Nestor Enterprises

Plant with Confidence

"STI provided a complete in-depth map of our soils prior to planting a new vineyard.  The data they generated will help us manage this ranch for decades to come. I can't imagine planting another vine without using STI's Soil Information System."
-Steve Harrow, Viticultural Director
West Coast Grape Farms

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   Fresno, CA
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Data Processing Center:
   Madison, WI

Phone: 877-950-7645
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