Updated: August 3, 2026
Soil Fertility Management-Converting Among Soil Test Analyses Frequently Used in Maryland (SFM-4)
Authors:
Frank J Cole
- Joshua M. McGrath
- Gurpal Toor
- Brian Kalmbach
- Paul Shipley
- David Ruppert
SFM-4 outlines conversions of soil test results from various regional soil test laboratories to Maryland's 'Fertility Index Value' (FIV) scale, upon which soil fertility recommendations for agricultural production are based. Authors: Frank J. Cole, Joshua McGrath, Gurpal Toor, Brian Kalmbach, Paul Shipley, and David Ruppert; Soil Fertility Management-Converting Among Soil Test Analyses Frequently Used in Maryland (SFM-4).
Updated: April 10, 2026
Care and Calibration of Injector Pumps (FS-1121)
This fact sheet was developed to familiarize you with the care and up-keep of fertilizer injector pumps or proportioners and to discuss several methods of calibrating these pumps for effective and efficient application of nutrients and other materials on your plants. Proper care and calibration will prevent under or over application of nutrients and other treatments needed for appropriate plant growth. Authors: Andrew G. Ristvey and Charles F. Schuster; Title: Care and Calibration of Injector Pumps (FS-1121)