published procedures
Teaching Healthy Cultivation · Repeatable methods
Measurement & Observation SOPs
Repeatable procedures make measurements comparable. These SOPs preserve instrument checks, sample context, raw observations, verification criteria, and limitations so a number or symptom note can be traced back to how it was produced.
measurement and biosecurity categories
steps, checks, records, and limitations on every SOP
Root-zone measurement
Root-zone measurement
pH Meter Calibration & Measurement
Produce traceable pH readings with a clean, calibrated meter and enough context to interpret the number correctly.
Open SOP →EC Meter Verification & Measurement
Generate consistent electrical-conductivity readings while preserving the sample method, temperature context, and instrument verification needed for comparison over time.
Open SOP →Light measurement
Light measurement
PPFD Canopy Grid Survey
Map photosynthetic photon flux density across a canopy or target plane so lighting uniformity and spatial variation are visible instead of inferred from one reading.
Open SOP →DLI Calculation & Logging
Convert a defined PPFD exposure over time into daily light integral while preserving the assumptions used in the calculation.
Open SOP →Environment measurement
Environment measurement
Air Temperature & RH Sensor Check
Document sensor placement, agreement, and operating context so temperature and relative-humidity records can be interpreted as measurements rather than assumed room truth.
Open SOP →Leaf Temperature Measurement
Collect repeatable leaf-temperature observations and the context needed to compare them with air conditions or use them in vapor-pressure analysis.
Open SOP →VPD Observation Record
Create a transparent vapor-pressure-deficit record that preserves the temperature and humidity inputs rather than storing only a derived VPD number.
Open SOP →Plant health & IPM
Plant health & IPM
Plant health & biosecurity
Plant health & biosecurity
Water & root zone
Water & root zone
Method policy
Preserve the method with the result.
These procedures intentionally avoid universal targets where substrate, instrument, cultivar, environment, or measurement method changes interpretation. A repeatable method and complete record are more useful than a context-free number.