Soil EC Mapping. Casey Andrews SOIL 4213 April 22, 2009. Crop Inputs. Historically, crop inputs were applied evenly over a field. Seed, irrigation, fertilizer, and pesticides. However, yields at the end of the growing season can vary greatly. Many factors affect crop yield.
April 22, 2009
One of the simplest devices to measure soil EC in the field.
Soil EC measurements have
been used since the early
1900’s-Veris mobilized the
process and added GPS.Veris Soil EC Mapping System
EC map (or the areas with higher EC
values) have more clay and organic
matter and less sand.
Identification of coarse-textured zones within the field that are susceptible to leaching.
Identification of coarse-textured zones within the field that have low water holding capacity and thus susceptible to crop water stress.
Identification of crop productivity zones based on relative clay and organic matter contents; and
Further improvement in USDA-NRCS soil maps for various on-farm management decisions.
Farahani H. J. , R. Khosla and G.W. Buchleiter. (2007). Field EC Mapping: A New Tool to Make Better Decisions. Colorado State University Extension. http://www.ext.colostate.edu/pubs/crops/00568.html