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Samples wereaccuracy this precise measure of location

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Unformatted text preview: (BD), in mm. The primary question here is “How do we distinguish between species and sex based on these five morphological measurements.” 9 Eg Crabs 1 9 9 Eg Soils 9 STAT 503X Case Study 3: Baker Field Data 1 Eg Description Soils Since the time that the Global Positioning System (GPS) became available for public use nearly ten years ago, there has been an increased interest in precision farming. The Global Positioning System allows the agronomist or soil scientist to ascertain her location within a field to a high level of accuracy. This precise measure of location in a field, combined with soil characteristics, yield measurements and other data associated with the location can then be used to extract valuable information about the complex process of plant growth. This information collected at multiple locations within a field can be used to formulate yieldmaximization strategies such as variable-rate fertilizer, herbicide or pesticide application. The data to be analyzed in this study was drawn from part of a privately owned farm in southeastern Boone County, Iowa Colvin, Jaynes, Karlen, Laird & Ambuel (1997). A total of 224 sites within an approximately 350 m × 350 m portion of the field were studied. The sites are located along 8 equally-spaced east-west transects. Along each transect there are 28 sites, spaced approximately 12.2 m apart. At harvest time, a combine is driven down each transect, stopping every 12.2 m to measure yield in bushels/acre (Colvin, et. al., 1997). The field of interest has been on a corn-soybean rotation since 1957. The 1997 data set to be discussed contains: 9 x location in the field y location in the field Corn97BY corn yields in bushells B Boron (parts per million) Ca Calcium (parts per million) Cu Copper (parts per million) Fe Iron (parts per million) K Potassium (parts per million) Mg Magnesium (parts per million) Mn Manganese (parts per million) Sodium 1 Na Description (parts per million) P Phosphorus (parts per million) Zn time...
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