Original printable tool · v1.0

Side-by-Side Treatment Comparison Sheet

Plan one fair comparison, preserve what was actually done, and keep observations separate from conclusions.

TerraEvidenceSide-by-Side Treatment Comparison Sheet · v1.0 · August 2026

Comparison ID: ____________________

1. Comparison identity

Start date

Observer

Crop / variety or system

Location, bed, row, field, or containers

Question being tested

Hypothesis or expectation — label this as a prediction, not a result

2. Planned comparison

Define the treatments before starting. Change one planned factor when practical and record every other known difference.

The one intended difference between the two sides

Side A — treatment or control

Side B — treatment or control

Number of plants, plots, or units in Side A

Number of plants, plots, or units in Side B

Assignment method□ Random □ Alternating □ Existing areas □ Other

Repeated units / replication□ Yes □ No Number per side: ______

3. Starting conditions

Soil, mix, or growing-medium source

Plant age / growth stage

Sun / exposure

Drainage / moisture condition

Known differences already present between Side A and Side B

Earlier fertilizer, compost, manure, pesticide, irrigation, disturbance, or other treatment—and date

Baseline measurements, units, methods, photographs, or sample IDs

4. Application and management record

Date / time	Side	Material or action	Amount, concentration, or duration	Method	Weather, moisture, and notes
	□ A □ B □ Both
	□ A □ B □ Both
	□ A □ B □ Both
	□ A □ B □ Both
	□ A □ B □ Both

5. Repeated observation record

Use the same measurement method, unit, timing, and sampling position for both sides whenever practical. Record missing observations as missing, not zero.

Date / day	Measurement or observation	Unit / method	Side A result	Side B result	Conditions, variation, photo or sample ID

6. Outcome review

What was directly observed or measured?

Variation within each side, missing data, surprises, or possible measurement problems

Uncontrolled differences or other explanations that could affect the result

Current result status□ Supports the prediction □ Does not support it □ No clear difference □ Inconclusive

What would need to be repeated, measured, or controlled next?

7. Completeness check

□ The intended treatment difference was defined before the comparison began. □ Amounts, dates, methods, and important management events were recorded for both sides. □ Measurements retain their original units and methods. □ Photographs or samples can be matched to the correct side and date. □ Observations are separated from explanations, estimates, and recommendations. □ Missing data, unequal starting conditions, and unexpected events remain visible. □ The conclusion does not claim more certainty than this comparison can support.