Of the many varied greenhouse crop production problems that we hear about at UMass Extension, a significant number trace back to water quality, especially those related to fertility, nutrient deficiencies, substrate pH, soluble salts, and pesticide eefficacy. Whether water quality is good or poor, still more issues come about due to a lack of detailed, up-to-date parameters for the water source, leading to a disconnect between actual water characteristics and specific crop production practices that are in place. The solution (no pun intended)? Consistent and accurate water testing, coupled with meaningful interpretation and, subsequently, informed modification of cultural practices.
Below are some excellent resources for getting a handle on water quality to produce higher quality plant material more successfully and efficiently:
- UMass Greenhouse Best Management Practices (BMP) Manual: Water Analysis - https://ag.umass.edu/greenhouse-floriculture/greenhouse-best-management…
- UMass Greenhouse Best Management Practices (BMP) Manual: Water Quality for Crop Production - https://ag.umass.edu/greenhouse-floriculture/greenhouse-best-management…
- University of Florida IFAS Extension: Common Water Issues and How to Take Samples - https://www.youtube.com/watch?v=lkSiSmDwIqw
- Clean WateR3: Tools for Interpreting Test Results and Recommendations for Treating Problems - https://www.cleanwater3.org/
- e-Gro: Calculating the Amount of Acid to Add in Order to Modify Water pH and Alkalinity Levels - http://e-gro.org/alkcalc/
UMass Extension's Plant Diagnostic Lab also offers water testing for the pathogens Pythium, Phytophthora, and Rhizoctonia - https://ag.umass.edu/services/plant-diagnostics-laboratory/irrigation-w…
- Angela Madeiras, Extension Educator and Diagnostician, UMass Extension Plant Diagnostic Lab and Jason Lanier, UMass Extension Specialist and Team Leader