Field 8: Nokkamäki
The field information contains basic information about the field and events during the growing season, observations, and yield data.
Field 8
Nokkamäki
Basic field information
Area: 4.41 hectares
Soil type: rich fine-sandy moraine (rmHtMr), medium fine sand (mKHt)
The field is diverse in both its edges and surface. The soil types are sand and sandy till. At the bottom of the field is a clay-rich protective zone (0.57 ha) bordering a beach ridge. On the western edge of the field is a 1 ha test area, with 0.5 ha of the area featuring 10-meter-wide biochar strips. The field is intended for long-term research on nutrient retention capacity. Excavation of the perimeter ditch on the side of Runkomäki, autumn 2020.
Crop rotation
2026 Winter wheat
2025 Silage grass
2024 Silage grass
Research and experiments
2022 Fertilization experiment with recycled nutrients
2021 Potassium and sulfur fertilization experiment (Soili 1-0-18-11)
2021 Monitoring of pea leaf weevil
2020 Organic carrot experiment
2019- Biochar field, long-term study
Cultivation practices
Winter wheat
9.9.2025 Plowing
9.9.2025 Harrowing
9.9.2025 Sowing, winter wheat Turanus 275 kg/ha
9.9.2025 Fertilization, Fertilex (4-1-2) 300kg/ha
10.4.2026 Fertilization, Fertilex (4-1-2) 600 kg/ha
10.4.2026 Fertilization, Polysulfaatti granular 150 kg/ha
8.5.2026 Fertilization, Combooster 40 l/ha
10.6.2026 Spad value measurement, combooster: 38,5, control: 40,0
5.8.2026 Moisture test from grains: 28%
13.8.2026 Harvest, yield 2720 kg/ha
19.8.2026 Straw baling
Growth observation
Observations made by students 5.11.2025
| Field | Sprouts (amount/m2) | Development stage (Zadoks) | Weeds (amount, harmfullness) |
Even crop, near the house Nokkamäki crop isn’t doing so well. | 390 | zadoks: 12, tillers: 2-3, Leafs: 3, height: 9-11cm | Lots of small weeds, mostly scentless mayweed |
| 460 | zadoks: 12, tillers 2-3, Leafs 3, height 8-11cm | Lots of small weeds, mostly scentless mayweed | |
| 440 | zadoks: 12, tillers: 2-3, Leafs: 3, height: 8-11cm | Lots of small weeds, mostly scentless mayweed |
scentless mayweed, dandelion, hemp-nettle, red dead nettle
Observations made by students 8.4.2026
| sample | sprouts/m2 |
| 1 | 852 |
| 2 | 884 |
| 3 | 720 |
| 4 | 924 |
21.5.2026 Sprouts per squaremeter on the winter wheat crop.
| sample | heads/test area | heads/m2 | grains/head | Potential yield (kg/ha) |
| 1 | 80 | 320 | 35,6 | 5680 |
| 2 | 117 | 468 | 35,4 | 8270 |
| 3 | 108 | 432 | 36,9 | 7950 |
| 4 | 124 | 496 | 33 | 8170 |
| average | 107,25 | 429 | 35,225 | 7520 |
22.6.2026 The count of heads and grains on winter wheat and a potential yield calculated. (No combooster, weight of thousand seeds in variety testings has been 49,9 g)
| sample | heads/test area | heads/m2 | grains/head | Potential yield (kg/ha) |
| 1 | 141 | 564 | 34,8 | 9790 |
| 2 | 154 | 616 | 37,8 | 11620 |
| 3 | 147 | 588 | 32,4 | 9510 |
| 4 | 101 | 404 | 34,2 | 6890 |
| average | 135,75 | 543 | 34,8 | 9450 |
22.6.2026 The count of heads and grains on rye and a potential yield calculated. (Combooster added, weight of thousand seeds in variety testings has been 49,9 g)
| koeala | tähkät/m2 | jyvät/tähkä | satopotentiaali (kg/ha) |
| fertilex | 368 | 24,4 | 4480 |
| nolla | 432 | 21,4 | 4610 |
| polysulfaatti | 440 | 21,6 | 4740 |
Cultivation measures
Silage grass
10.6.2025 Harvest, yield 2100 kg DM/ha
7.8.2025 Harvest, yield 2400 kg DM/ha
2.9.2025 Cleaning cut
9.9.2025 Plowing
9.9.2025 Harrowing
9.9.2025 Sowing, winter wheat Turanus 275 kg/ha
9.9.2025 Fertilization, Fertilex (4-1-2) 300 kg/ha
7.7.2025
23.7.2025
Cultivation measures
Silage grass
5.6.2024 Harvest, yield 1800 kg DM/ha
23.7.2024 Harvest, yield 2000 kg DM/ha
10.9.2024 Harvest, yield 2400 kg DM/ha
Cultivation measures
Silage grass field
20.4.2023 Supplementary sowing
16.6.2023 Harvest, yield 1100 kg DM/ha
20.7.2023 Plowing
21.7.2023 Cultivation
22.7.2023 Sowing silage grass
22.7.2023 Rolling
Cultivation measures
Spring wheat, Leijona (4.4 ha)
5-6.5.2022 Plowing
9.5.2022 Harrowing 1, penetrating goose foot blade
10.5.2022 Harrowing 2, penetrating goose foot blade
10.5.2022 Fertilization, Potassium sulfate, Surface application, 200kg/ha
10.5.2022 Sowing: Spring wheat, Lion, 300kg/ha, Fertilization trial, Yara Biosuna, 600kg/ha, 900kg/ha
6.6.2022 Sowing: Grass seed, Retu-kuohk. 30kg/ha
17.5.2022 Fertilization 2ha: Liquid, Amazinc 1l/ha and Biotrac 1l/ha
25.8.2022 Harvesting, yield 2700 kg/ha
Fertilization trial (2022)
Fertilizer: Yara Suna
Yield:
Strip N 0= 3040kg/ha
Strip N 60= 4640kg/ha
Strip N 90= 5260kg/ha
Read more from the fact sheet.
Cultivation measures
Pea, Astronaut (4.4 ha)
3-4 May 2021: Harrowing twice, penetrating goose foot blade
4 May 2021: Sowing: Pea, Astronaut 314 kg/ha + fertilizer (Soili 1-0-18-11) 111 kg/ha
27 July 2021: Harvest, yield 2860 kg/ha
11 August 2021: Sowing, nitrogen fixing mixture: English ryegrass, Persian clover, alfalfa Jögeva, White clover 5.8 kg/ha
Buffer zone lawn (0.57ha)
21.6.2021 Dry hay harvest, yield 830 kg/ha
Cultivation measures
Winter wheat Ceylon
7.5.2020 Fertilization, Ecolan Agra 8-4-8, 400 kg/ha on approximately 1.5 hectares + Yara Bio 8-4-2, 400 kg/ha on approximately 2 hectares
18.8.2020 Harvesting, Yield 3850 kg/ha
21.8.2020 Straw collection
3.9.2020 Harrowing, penetrating goosefoot blade
7.10.2020 Plowing, 20 cm
Open land production area (carrots, etc.)
5.5.2020 Ploughing
22.5.2020 Milling
27.5.2020 Sowing, Carrots
28.5.2020 Planting, Potato
1.6.2020 Planting, Yellow and Red Onion
1.6.2020 Sowing, Blacksalsify, Parsley root, Parsley, Beetroot, Striped beet
2.6.2020 Sowing, Slash-and-burn turnip and Swede
4.6.2020 Sowing, Zucchini in pots
23.6.2020 Planting, Zucchini in the open field
24.6.2020 Observations: Due to the dry weather and disregarding irrigations Only carrots have germinated. The onions are growing well.
Research and experimentation
During the growing season of 2020, the effect of fertilization and mycorrhizae on the growth and yield of organic carrots was studied. More information can be found in the data sheet.
Buffer zone lawn
10.6.2020 Mowing
11.6.2020 Raking
Cultivation measures
Silage grass
10.4.2019 Supplementary sowing 10 kg/ha
14.6.2019 Harvest, yield 2700 kg DM/ha
24.7.2019 Harvest, yield 900 kg DM/ha
4.9.2019 Harvest, yield 2200 kg DM/ha
20.9.2019 Plowing
26.9.2019 Planting, winter wheat, Ceylon 220 kg/ha
Field for comparison of fertilization and variety of winter cereals.
Cultivation measures
Oat, Matty (cover crop)
9.5.2018 Levelling harrowing
14.5.2018 Sowing: Oat Matty 240 kg/ha and Grass Seed Naturcom Nurmiseos 25 kg/ha (timothy 40%, tall fescue Retu/Karolina 25%, alfalfa SW Nexus/Live 20%, Italian ryegrass Meroa 5%, red clover Saija/SW Yngve 5%, alsike clover Frida/Aurora 3%, white clover Jögeva4 2%)
28.5.2018 Weed harrowing, sowing of grass seed
10.8.2018 Harvest 2120 kg/ha
14.8.2018 Straw baled 462 kg/ha 8 bales.
Cultivation measures
Mixed crop, oat Matty and barley Streif
8.5.2017 Plowing
10.5.2017 Harrowing
12.5.2017 Sowing and fertilization: Mixed grain 245kg/ha (Oat Matty, Barley Streif 50%/50%), YaraBela Suomen salpietar 27-0-1 370 kg/ha (99.2-0-4)
16.5.2017 Rolling
18.5.2017 Catch crop Italian ryegrass 2.7 kg/ha
6.6.2017 Ariane S 1l/ha
15.6.2017 Ariane S 1.5l/ha
29.6.2017 Crop protection: Acanto 0.25 l/ha, Proline 250 EC 0.25 l/ha, Moddus M 0.25 l/ha
The crop was harvested as crushed grain, yield (13.5%) 7016 kg/ha.
Cultivation measures
Pictures of different stages of growth season
Soil fertility analysis result on 26.11.2021:
Nokkamäki sampling lines 7 and 8:
Soil fertility analysis result on May 2nd, 2018.
Soil fertility analysis result 2014:
2026 Winter wheat
2025 Silage grass
2024 Silage grass
2023 Silage grass
2022 Spring wheat Leijona
2021 Pea, Astronaut
2020 Winter wheat Ceylon
2019 Silage grass
2018 Oat, Matty (cover crop)
2017 Mixed grain, Oats Matty and Barley Streif
2016 Spring wheat, Amarett
2015 Pea Rocket
2014 Barley Tiril
2013 Spring wheat Anniina
2012 Spring wheat Anniina
2011 Spring wheat Anniina
2010 Spring rapeseed Cordelia