THE NETHERLANDS Farm details Oakfield Champignons
WHITE MUSHROOMS Number of growing rooms: 20 Surface area of growing rooms: 367 and 490 m2 Size of farm: 8,324 m2 Cropping cycle: 4.5 weeks Number of flushes: 2 Filling: on average 4 growing rooms per week Compost: CNC phase III. Filling weight 90 kg/m2 Casing soil: CNC type Dutch New and Euroveen Carbo 9.5 Quantity casing soil: 4.2 m3/100m2 Variety: A15 Shelving: two rows of shelving, five high and four rows of shelving, four high Climate control system: standard overpressure using fresh outside air
Cooling system growing rooms: freon cold water cooling, mobile freon cooling coils in the growing rooms Climate control computer: Fancom Production: 29 kg/m2 Production per week: 55 tons Grades: extra fine< 3%, fine 35-40%, medium 30%, giant 20-25%, III 7%
Picking performance: 32 kg/hour
BROWN MUSHROOMS Number of growing rooms: 6 Surface area of growing rooms: 492 m2 Size of farm: 2,952 m2 Cropping cycle: 6 weeks Number of flushes: 3 Filling: 1 growing room per week Compost: CNC phase III 95 kg/ m2 Casing soil: Euroveen euro ix 80/20 Variety: Heirloom Shelving: four rows of shelving, four high Climate control system: central duct with freon cold water cooling
Cooling system growing rooms: freon cold water Climate control computer: Fancom Production: 31 kg/m2 Production per week: 15 tons Grades: fine 30% medium 48% giant 15% portabella 5% III 3% Picking performance: 28 kg/hour
SHIITAKE (LENTINULA EDODUS) Substrate: spawn run blocks Cropping cycle: 2 to 3 weeks Number of flushes: 1 Substrate supplier: CNC exotic mushrooms Substrate: blocks of approximately 3 kg Production: 23% of the substrate weight
PHOLIOTA NAMEKO Substrate: spawn run blocks Cropping cycle: 6 to 8 weeks Number of flushes: 2 Substrate supplier: CNC exotic mushrooms Substrate: 3 kg blocks Production: 26- 28% of the substrate weight
OTHER MUSHROOM VARIETIES Growing rooms: 18 Room size: 350 m2 Size of farm: 6,300 m2 Production per week: 10 tons (at full capacity)
OYSTER MUSHROOMS (PLEUROTUS OSTREATUS) Substrate: inoculated and spawn run substrate Cropping cycle: 9 weeks (inoculated) and 7 weeks (spawn run) Number of flushes: 2 Variety: Spoppo (sporeless variety) Substrate supplier: VeMe (NL) and Eurosubstrate (FR) Substrate: 18 kg blocks Production: 25-26 % of the substrate weight
KING OYSTER MUSHROOMS (PLEUROTUS ERYNGII) Substrate: spawn run blocks Cropping cycle: 3 weeks Number of flushes: 1 Substrate supplier: CNC exotic mushrooms Substrate: blocks of approximately 3 kg Production: 20% of the substrate weight
sprayed and 6 l/m2 after the first flush. At the start of the second flush Arthur sprays 3 l/m2
and
after the second flush approximately 4 l water/m2 before the third flush.
Graph evaporation white mushrooms from cool down to end second flush.
28 MUSHROOM BUSINESS
Measuring evaporation In the growing rooms, the absolute moisture con- tent of the air and the inlet air is calculated by measuring the dry and wet bulb temperature of the growing room air and the inlet air. In the con- trol computer, Arthur sets a minimum difference between AH growing room and AH inlet air to a
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