| | | Soil Electrical Conductivity |
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These three images are of the upper middle field shown on page 25. The photo at top, which is of the bare field, displays the unique pattern of soil variability. It was taken in 1994.
The second image is a grid cell map created with Geographical Information System (GIS) software from soil electrical conductivity data. Each square represents an area 20 feet by 20 feet. The lighter areas are of lower relative SEC, graduating to the darker areas of higher SEC.
The image below is a grid cell map created from the yield monitor data from the harvest of the 1999 corn crop. The lighter areas are of lower corn yield, 100 to 120 bushels per acre, graduating to the darker areas of higher corn yield, from 160 to 180 bushels per acre. Note the similarities in all three images.
Read accompanying article:
Mapping and Interpreting Electrical Conductivity in Production Fields
(This article was published in the summer 2001 issue of Louisiana Agriculture.) |