Spectrum Technologies Field Scout 2266FS Product Manual page 19

Poinsettia during
weeks 2-12.
Pansies during
active growth.
Geraniumus during
active growth.
Comparison of substrate tests for various EC sam-
pling methods. (Calvins, Whipker, and Fonteno,
North Carolina State University).
a
saturated media extract
b
1 part soil to 2 parts water
Classification of
Irrigation Water
Excellent
Good
Permissible
Doubtful
Unsuitable
Categories of irrigation water quality based on elec-
trical conductivity. [Wilcox L.V. (1948) The Quality of
Water for Irrigation Use, USDA Technical Bulletin
962]
Recommended EC Value (mS/cm)
a
SME
2.0 - 3.0
0.25 - 1.5
1.6 - 2.4
Appendix 2
EC < 0.25 mS/cm
0.25 mS/cm < EC < 0.75 mS/cm
0.75 mS/cm < EC < 2.0 mS/cm
2.0 mS/cm < EC < 3.0 mS/cm
EC > 3.0 mS/cm
b
1 to 2 Pour thru
0.85 - 1.25 2.8 - 4.1
0.1 - 0.6 0.35 - 2.1
0.65 - 1.0 2.2 - 3.3
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