XC (90) 2006, No. 1
Terry L. Roberts Named President of PPI
Soil Test Levels in North America
P.E. Fixen
Soil Fertility in the Northeast Region
T.W. Bruulsema
Soil Test Levels and Changes in the Southern and Central Great Plains Region
Mike Stewart
Northcentral Soil Test Summary: Changes in Phosphorus and Potassium
Scott Murrell
Little Change in Soil Phosphorus and Potassium in the Northern Great Plains
Adrian Johnston
Phosphorus and Potassium Budgets and Soil Test Levels in the Mississippi-Atchafalaya River Basin
Cliff Snyder
A Check-Up on Nutrients in the West
Rob Mikkelsen
Soil Test Levels in North America, 2005
Rob Mikkelsen Honored as Fellow of ASA
Changes in PPI/PPIC Staff Responsibilities
A Western Evaluation of Soil Testing Laboratory Performance
Robert O. Miller
Available Phosphorus and Potassium Status of Soils of Amazonas State
Adônis Moreira and José Ricardo Pupo Gonçalves
Effect of Iron Chelate Application on Citrus in the Three Gorges Area
Fang Chen, and Jianwei Lu
GIS-Based Site-Specific Management of Cocoa
José Espinosa, Francisco Mite, Sergio Cedeño, Sandra Barriga, and Javier Andino
Out of Season
T. Scott Murrell