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Lime Requirement Buffer pH Update 2019

This fact sheet describes recent discrepancies between SMP and Sikora buffer pH lime requirement tests for western Oregon soils and provides recommendations for what to do. Many soil testing labs in the U.S. are switching from the SMP to the Sikora buffer test for lime requirement in an effort to reduce the use of carcinogenic chemicals in the procedure. Wide-scale testing ...

Nicole Anderson | Sep 2019 | Fact Sheet

What's the difference between chemical, organic fertilizers?

Differences between processed and organic fertilizers are explained in this article.

May 14, 2004 | News Story