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2001 Soil Test Levels in North America
With the cooperation of numerous public and private soil testing laboratories, PPI periodically summarizes soil test levels for phosphorus (P), potassium (K), and pH in North America. The recently completed summary for 2001, eighth in a series dating back to the late 1960s, shows that approximately 45 percent of soil samples are currently testing medium or lower in P and K. The two maps below show the percent of soils testing medium or lower in P and K in individual states and provinces of the U.S. and Canada.
Percent of soils testing medium or lower in P.
 
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Percent of soils testing medium or lower in K.
 
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 | Various other trends and implications can be found in the report, which is available for purchase as PPI/PPIC/FAR Technical Bulletin 2001-1. The printed report is 18 pages long and contains five tables and 24 color figures along with interpretive text. A CD-ROM is also available containing a pdf file showing the pages of the report, a PowerPoint file of all figures (graphs) in the report, and an Excel workbook of major tables to facilitate construction of custom graphs for regions of interest. |
There are two options for ordering the printed report ($10), CD ROM ($10) or both ($15):
Option 1: print out this pdf order form: 
Option 2: order online from the  PPIStore
See also the write-up of this new information in Better Crops: Soil Test Levels in North America - Summary Update
 > more information about soil testing
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