Seven countries, thirty-two trials, 2014–2023
Results from farms
Each trial lists the crop, country, season and source.
What it comes to for each crop
One entry per crop: the range of yield increase, the number of trials and the countries.
| Crop | Yield increase against untreated plot | Trials and countries |
|---|---|---|
| Wheat | 11.9–32% | 10 trials · Ukraine, Austria, Canada, Russia2 trials with a different reference |
| Barley | 14.4–24.7% | 4 trials · Ukraine |
| Soybean | 18.5–34.5% | 4 trials · Ukraine |
| Potato | 10.5% | one trial · Austria4 trials with a different reference |
| Maize | no trial calculated against a control | 3 trials with a different reference |
| Sugar cane | 28.9% | one trial · Barbados |
| Hemp | 12.2% | one trial · Austria |
| Sunflower | no trial calculated against a control | 1 trial with a different reference |
| Triticale with pea | 18.8% | one trial · Austria |
Crop by crop
Wheat
Ukraine: protocol 2× 1.1 l/ha in 250 l of water, 2.2 l/ha per season in total.
| Crop | Country and region | Season | Dose in trial, l/ha | Yield t/ha (gain) | Yield increase | Source |
|---|---|---|---|---|---|---|
| Winter wheat | Ukraine, chernozem | 2014–2015 | per protocol above the table | 5.9 (+0.7) | 13.46% | farm report |
| Winter wheat | Ukraine, chernozem | 2015–2016 | per protocol above the table | 6.1 (+0.9) | 17.31% | farm report |
| Winter wheat | Ukraine, chernozem | 2016–2017 | per protocol above the table | 6.2 (+1.0) | 19.23% | farm report |
| Winter wheat | Ukraine, chernozem | 2017–2018 | per protocol above the table | 6.4 (+1.2) | 23.08% | farm report |
| Wheat, var. Ermak | Russia, Rostov region | 2017–2018 | 2× 0.5 l/ha (with herbicide, with fungicide) | 5.0 (+1.6) | 47% Drought zone, poor soils. | farm report |
| Wheat, var. Yuka | Russia, Rostov region | 2017–2018 | 2× 0.5 l/ha (with herbicide, with fungicide) | 6.0 (+2.0) | 50% Drought zone, poor soils. | farm report |
| Organic wheat | Austria | 2016–2017 | 0.5 | 4.7 (+0.5) | 11.9% | farm report |
| Organic wheat | Austria, Alpine foothills | 2017–2018 | seed treatment 450 ml/200 kg (36 h) + spray 400 ml in 400 l of water/ha | 3.1 (+0.4) | 14.81% Compacted soil, poor structure, almost no root hairs in the top 10 cm. | farm report |
| Wheat | Canada, Blackie, chernozem | 2018 | 2× 1 l/ha in 300 l of water + seed treatment | 59 bu (+12 bu) | 25.5% Harvest: 59 vs 47 bushels per acre (3.97 vs 3.16 t/ha). | farm report |
| Winter wheat, field A | Russia, Rostov region | 2018–2019 | 2× 0.5 l/ha (tillering + milk ripeness) | — | 32% Gluten +4 pp, protein +1.6 pp. | farm report |
| Winter wheat, field B | Russia, Rostov region | 2018–2019 | 2× 0.5 l/ha (tillering + milk ripeness) | — | 18% Gluten +5 pp, protein +1.7 pp. | farm report |
| Wheat | Canada, Alberta, chernozem | 2016–2017 | — | — | 14% Harvest: 57 vs 50 bushels per acre. | consolidated summary |
Barley
Ukraine: protocol 2× 1.1 l/ha in 250 l of water, 2.2 l/ha per season in total.
| Crop | Country and region | Season | Dose in trial, l/ha | Yield t/ha (gain) | Yield increase | Source |
|---|---|---|---|---|---|---|
| Winter barley | Ukraine, chernozem | 2014–2015 | per protocol above the table | 4.12 (+0.52) | 14.44% | farm report |
| Winter barley | Ukraine, chernozem | 2015–2016 | per protocol above the table | 4.29 (+0.69) | 19.17% | farm report |
| Winter barley | Ukraine, chernozem | 2016–2017 | per protocol above the table | 4.39 (+0.79) | 21.94% | farm report |
| Winter barley | Ukraine, chernozem | 2017–2018 | per protocol above the table | 4.49 (+0.89) | 24.72% | farm report |
Soybean
Ukraine: protocol 2× 1.1 l/ha in 250 l of water, 2.2 l/ha per season in total.
| Crop | Country and region | Season | Dose in trial, l/ha | Yield t/ha (gain) | Yield increase | Source |
|---|---|---|---|---|---|---|
| Soybean | Ukraine, chernozem | 2014–2015 | per protocol above the table | 2.37 (+0.37) | 18.5% | farm report |
| Soybean | Ukraine, chernozem | 2015–2016 | per protocol above the table | 2.41 (+0.41) | 20.5% | farm report |
| Soybean | Ukraine, chernozem | 2016–2017 | per protocol above the table | 2.49 (+0.49) | 24.5% | farm report |
| Soybean | Ukraine, chernozem | 2017–2018 | per protocol above the table | 2.69 (+0.69) | 34.5% | farm report |
Potato
| Crop | Country and region | Season | Dose in trial, l/ha | Yield t/ha (gain) | Yield increase | Source |
|---|---|---|---|---|---|---|
| Organic potato, var. Ditta (trial 1) | Austria | 2017 | — | — | 20% | farm report |
| Organic potato, var. Blaue St. Galler | Austria | 2017 | — | — | 13.33% | farm report |
| Potato, var. Ditta (trial 2) | Austria | 2016–2017 | — | — | 14.3% | consolidated summary |
| Potato, var. Kuras | Austria | 2016–2017 | — | — | 44% | consolidated summary |
| Organic potato | Austria | 2018 | 0.625 | 5.25 (+0.5) | 10.53% | farm report |
Maize
| Crop | Country and region | Season | Dose in trial, l/ha | Yield t/ha (gain) | Yield increase | Source |
|---|---|---|---|---|---|---|
| Organic maize | Austria | 2017 | 2.3 | 3.9 (+3.9) | — Dry matter 87.2 g/100 g, sugar 3.5 g/100 g. | farm report |
| Maize | Ukraine | 2017–2019 | 2.0 | 10.1 (+1.7) | 17% | farm report |
| Maize | Bulgaria | 2023 | 2.0 | 9.13 (+0.70) | 8.43% | farm report |
Sugar cane
| Crop | Country and region | Season | Dose in trial, l/ha | Yield t/ha (gain) | Yield increase | Source |
|---|---|---|---|---|---|---|
| Sugar cane | Barbados | 2017–2018 | 3× 1.5 l/ha in 300 l of water | 58 (+13.0) | 28.89% +28.6% sugar yield per hectare, juice purity 85% vs 81%. | farm report |
Hemp
| Crop | Country and region | Season | Dose in trial, l/ha | Yield t/ha (gain) | Yield increase | Source |
|---|---|---|---|---|---|---|
| Organic hemp | Austria | 2017 | 1.45 | 1.1 (+0.12) | 12.2% Hectolitre weight 53.1 vs 50.7 kg/hl; total fat 29.4 vs 28.9 g/100 g (+1.7% relative); peroxide value lower (2.5 vs 2.7); acid value higher (1.8 vs 1.3 mg KOH/g). Laboratory in Linz, samples with and without ProtoHumiX®. | farm report + laboratory |
Sunflower
| Crop | Country and region | Season | Dose in trial, l/ha | Yield t/ha (gain) | Yield increase | Source |
|---|---|---|---|---|---|---|
| Sunflower | Romania | 2023 | 2.5 | 3.64 (+0.34) | 9.26% | farm report |
Triticale with pea
| Crop | Country and region | Season | Dose in trial, l/ha | Yield t/ha (gain) | Yield increase | Source |
|---|---|---|---|---|---|---|
| Triticale with pea, 50/50 mixture | Austria | 2016–2017 | 0.5 | 3.8 (+0.6) | 18.75% | farm report |
What this means in złoty
The calculation covers trials from Ukraine, Russia, Canada and Austria. We convert their percentage increase to a Polish reference yield and to purchase prices from mid-2026. This is the order of magnitude of the return on a Polish farm, not the economics of those farms.
| Crop and country of trial | Treatment cost per ha | Additional yield | Additional revenue per ha | Return (revenue ÷ cost) |
|---|---|---|---|---|
| Winter wheat (Ukraine, 4 seasons) | 231 PLN/ha (2.2 l/ha) | 0.70–1.20 t/ha | 525–900 PLN/ha | 2.3–3.9× |
| Winter barley (Ukraine, 4 seasons) | 231 PLN/ha (2.2 l/ha) | 0.69–1.19 t/ha | 484–830 PLN/ha | 2.1–3.6× |
| Soybean (Ukraine, 4 seasons) | 231 PLN/ha (2.2 l/ha) | 0.48–0.90 t/ha | 866–1615 PLN/ha | 3.7–7.0× |
| Winter wheat, field A (Russia) | 105 PLN/ha (2× 0.5 = 1.0 l/ha) | 1.66 t/ha | 1248 PLN/ha | 11.9× |
| Winter wheat, field B (Russia) | 105 PLN/ha (2× 0.5 = 1.0 l/ha) | 0.94 t/ha | 702 PLN/ha | 6.7× |
| Wheat, 2018 season (Canada) | 210 PLN/ha (2× 1 = 2.0 l/ha) | 1.33 t/ha | 995 PLN/ha | 4.7× |
| Organic wheat (Austria)estimate | 89 PLN/ha (0.85 l/ha) | 0.44 t/ha | 526 PLN/ha | 5.9× |
How we calculate
The baseline yield is the national average from Statistics Poland (GUS) for the latest available data. The price is the purchase price from mid-2026 (ZSRIR quotations, i.e. the Integrated Agricultural Market Information System, and the market).
The treatment cost is the trial dose multiplied by the price per litre from the 20 l canister of the more expensive of the two lines, so the cost is not calculated at the price of the cheaper line. The price is without volume discount: with bulk purchase the cost per hectare is lower and the return higher. In the Canada row the cost covers both sprays. The report does not give quantities for seed treatment, so the cost in that row is a lower bound. For the Austrian row we take the dose as the sum of seed treatment and spraying, as stated in the farm report.
The return is the additional revenue divided by the treatment cost. It is gross revenue per 1 złoty of treatment, not net profit. Rows covering several seasons show a range of revenue and return.
The “estimate” row (organic wheat) rests on an approximate price premium and a lower baseline yield for organic farming. For these crops there are no regular purchase price quotations in Poland.
Check it on your own field
Leave an untreated strip on one field and compare at harvest. It is the only measurement that answers the question about your soil, your variety and your season.