AREI · Stende · Latvia · 2025
Trial tables
Measured values from the original trial reports and workbook. Treatment codes and units are preserved. These observations are not forecasts for Canadian farms.
01 / AREI · 2025
Potatoes · ‘Paroli’
NPK = mineral-fertilized background; NPK0 = no basal fertilizer. C1, C2 and C3 = ChitoHumus at 0.1, 0.2 and 0.3 L/ha respectively.
| Treatment | Total yield, t/ha | Starch in product, % | Starch yield, t/ha | Marketable fraction, % |
|---|---|---|---|---|
| NPK | 47.24 | 10.27 | 4.85 | 49.8 |
| NPK C1 | 49.33 | 12.86 | 6.34 | 49.4 |
| NPK C2 | 47.67 | 14.72 | 7.02 | 87.1 |
| NPK0 | 35.33 | 12.72 | 4.49 | 91.5 |
| NPK0 C1 | 36.87 | 12.97 | 4.78 | 79.3 |
| NPK0 C2 | 30.96 | 12.66 | 3.92 | 42.1 |
| NPK0 C3 | 32.83 | 12.78 | 4.20 | 66.3 |
Read these measures separately
No statistically significant yield increase. The reported LSD at 5% was 3.76 t/ha.
For NPK C2 versus NPK, starch concentration rose by 4.45 percentage points. Starch yield was 7.02 versus 4.85 t/ha: +44.7%, calculated from the displayed rounded values. The report’s relative starch-yield column is inconsistent, so it is not used here.
Marketable fractions come from a four-plant sample, not a field-scale marketable-yield measurement. Statistical significance for starch concentration and marketable fraction is not established in the supplied report.
02 / AREI · 2025
Lettuce · greenhouse
| Treatment | Dose per application, L/ha | Fresh mass, g/plant |
|---|---|---|
| NPK | 0 | 70.21 |
| NPK C1 | 0.1 | 65.07 |
| NPK C2 | 0.2 | 77.41 |
C2 was +10.3% versus NPK alone; C1 was lower than the control. Statistical significance was not reported for these comparisons.
Read the complete source report ↗03 / AREI · 2025
Peas · greenhouse soil experiment
| Treatment | Dose per application, L/ha | Fresh mass, g/pot | Non-missing pots |
|---|---|---|---|
| Control | 0 | 76.55 | 9 |
| C2 | 0.2 | 102.51 | 10 |
+33.9% in fresh mass per pot. Powdery mildew led to early harvest. The per-plant calculation contains a counting error and is excluded; this result is not grain yield.
Read the complete source report ↗04 / AREI · 2025
Beetroot · source-data audit
The report’s +39.4% claim uses means that omit one of four replicates. Using all four raw replicates gives approximately 43.37 t/ha for the NPK0 control and 56.48 t/ha for NPK0 C2. This is a data audit, not a corrected author-approved result or evidence that fertilizer can be replaced.
Inspect every replicate ↗Read the complete source report ↗