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Topics

MushroomFarming / guide

Outdoor Phase I

Understand stack formation, turning, watering, drainage, weather exposure and the limits of outdoor control.

Practical explanation + detailed referenceSources & review ↓
Polythene compost bags topped with dark casing soil and emerging button-mushroom pinheads in a dim cropping room, Tamil Nadu (uploader is a TNAU student; Tamil caption 'mushroom cultivation method').
Real cultivation photograph. Read its source for location and context; it is not a universal operating specification.Rahumath nisha · CC BY-SA 4.0View full photograph ↗
On this pageChoose a section, or keep reading below

Read this in the full guide: Understand and document a compost batch →

Understand the topic

Start with the explanation.

Protect the platform, map edge and core conditions, turn with a purpose and distinguish rainwater from process water.

Part 01

Simple explanation

Outdoor Phase I relies on pile geometry, microbial heat, turning and operator response under changing weather.

Conceptual compost heap cutaway showing straw structure and internal spaces.
AI teaching illustrationStructure and air

The heap has structure, depth and internal variation. One central reading does not describe every part of the material.

Conceptual explanation—not a real farm photograph, diagnostic finding or construction specification.
Part 02

What is happening

Natural convection, diffusion, evaporation and edge heat loss create spatial differences that turning partially redistributes.

Part 03

Operator explanation

Protect the platform, map edge and core conditions, turn with a purpose and distinguish rainwater from process water.

Part 04

What to look for

Observation should describe stage, location, pattern and change history before interpretation.

  • Weather exposure
  • pile shape
  • edge drying
  • core condition
  • runoff
  • turning uniformity
Part 05

What to measure

Measurement must retain method, unit, location, timing, calibration and sample identity.

  • Temperature map
  • water additions
  • rain exposure
  • moisture samples
  • turning history
Part 06

Equipment and process boundary

Equipment is useful only when its role in the biological process is explicit.

  • Impermeable cleanable platform
  • weather protection
  • drainage
  • turner or loader
  • safe access
Part 07

Variables that interact

Platform, roof, drainage, pile geometry, turning equipment and labour form the outdoor process system.

Part 08

What can go wrong

A symptom may have several mechanisms. Verify the cause before changing the process.

  • Rain-driven variability
  • cold edges
  • manual nonuniformity
  • leachate loss
  • anaerobic core
Part 09

What changes at commercial scale

Scaling changes geometry, repeatability, instrumentation, material flow and failure consequence.

  • Labour rises quickly with batch size
  • Mechanization improves mixing but does not remove weather and sampling limits
Part 10

What the evidence can tell you

Mapped evidence: Mushroom Cultivation, Marketing and Consumption; Influence of turning methods on temperature profile of Button Mushroom compost pile. Foundational, current operational, research and engineering sources retain their different roles.

Illustration of an operator recording a compost probe reading beside material samples.
AI teaching illustrationRelease with evidence

The batch record brings measurements and observations together. The calendar alone cannot prove compost is ready for spawning.

Conceptual explanation—not a real farm photograph, diagnostic finding or construction specification.

Go deeper

Technical reference, records and tools.

Detailed crop-stage information, parameters, diagrams and specialist tools are kept together below. This material retains its source conditions and review limits.

Open the complete technical reference

Compost system · process stage

Outdoor Phase I

Understand stack formation, turning, watering, drainage, weather exposure and the limits of outdoor control.

Crop context
Agaricus bisporus
Publication
Public editorial page
External review
Not yet recorded · needed from Button Mushroom compost technical reviewer
Evidence records
2
Straw and compost heaps under an open-sided composting shed at the PT Dieng Djaya button-mushroom farm, Wonosobo, Central Java (archival, 1979); dim frame. Downloaded as the 3840px Commons JPEG render; original is 4964x3340 image/tiff (99 MB).
Compost preparation yard: rice straw and compost heaps under an open shed (Indonesia). Photo: Steijlen, Fridus, CC BY 4.0. Source

Compost temperature from day 0 to spawning

Long-method heap 65 to 70 °C with turnings, then pasteurisation at 58 to 59 °C for 4 to 6 hours, conditioning at 45 to 52 °C, cooling to 25 to 30 °C for spawning. Source: ICAR-DMR manual 2011.

30°40°50°60°70°80°turnturnturnPhase I: outdoor heap, 65 to 70 °CPhase II: 58 °C, then 45 to 52 °Cspawn at 25 to 30 °Cday 0day 22
Phase I heapPhase II tunnelPasteurisation band
Picture → explanation → field task

Understand the working room

AI-generated educational illustrations. Not actual farm photographs, diagnostic evidence or construction specifications.

Generated conceptual cutaway of an insulated mushroom-room wall and closed door.
01

Keep the room envelope continuous

Walls and doors form one enclosure. Joints, penetrations and door use affect the room as well as insulation. This cutaway is not a material or fire-safety specification.

Try this on your farm

Ask a qualified designer to review the envelope, moisture protection, cleanability and local safety requirements together.

Generated illustration of mushroom racks with a central access aisle and a worker.
02

Leave room for people to work

People need access to every growing level. Adding shelf area changes handling, access and air distribution. An attractive room picture cannot establish safe rack dimensions.

Try this on your farm

Walk through loading, harvesting, cleaning and emergency access with the designer before fixing the rack arrangement.

Quick orientation

Protect the platform, map edge and core conditions, turn with a purpose and distinguish rainwater from process water.

01

Simple explanation

Outdoor Phase I relies on pile geometry, microbial heat, turning and operator response under changing weather.

02

What is happening

Natural convection, diffusion, evaporation and edge heat loss create spatial differences that turning partially redistributes.

03

Operator explanation

Protect the platform, map edge and core conditions, turn with a purpose and distinguish rainwater from process water.

04

What to observe

Observation should describe stage, location, pattern and change history before interpretation.

  • Weather exposure
  • pile shape
  • edge drying
  • core condition
  • runoff
  • turning uniformity

05

What to measure

Measurement must retain method, unit, location, timing, calibration and sample identity.

  • Temperature map
  • water additions
  • rain exposure
  • moisture samples
  • turning history

06

Equipment and process boundary

Equipment is useful only when its role in the biological process is explicit.

  • Impermeable cleanable platform
  • weather protection
  • drainage
  • turner or loader
  • safe access

07

Variables that interact

Platform, roof, drainage, pile geometry, turning equipment and labour form the outdoor process system.

08

What can go wrong

A symptom may have several mechanisms. Verify the cause before changing the process.

  • Rain-driven variability
  • cold edges
  • manual nonuniformity
  • leachate loss
  • anaerobic core

09

What changes at commercial scale

Scaling changes geometry, repeatability, instrumentation, material flow and failure consequence.

  • Labour rises quickly with batch size
  • Mechanization improves mixing but does not remove weather and sampling limits

10

Evidence boundary

Mapped evidence: Mushroom Cultivation, Marketing and Consumption; Influence of turning methods on temperature profile of Button Mushroom compost pile. Foundational, current operational, research and engineering sources retain their different roles.

Progressive depth

Move from field observation to mechanism, engineering and evidence without losing the original question.

PracticalWhat the operator notices
  • Outdoor Phase I relies on pile geometry, microbial heat, turning and operator response under changing weather.
  • Weather exposure
  • pile shape
  • edge drying
TechnicalHow process variables interact
  • Platform, roof, drainage, pile geometry, turning equipment and labour form the outdoor process system.
  • Temperature map
  • water additions
  • rain exposure
EngineeringHow the physical system serves the process
  • Impermeable cleanable platform
  • weather protection
  • drainage
  • Labour rises quickly with batch size
  • Mechanization improves mixing but does not remove weather and sampling limits
ResearchWhich evidence records govern this page
  • COMPOST-SRC-DMR-MANUAL
  • COMPOST-SRC-ICAR-TURNING

The numbers for this step, with their source.

Process values are published from ICAR-DMR guidance with the stage and measuring point they apply to. A parameter still marked pending has no published Indian value yet.

Biological and process parameters

COMPOST.PHASE1.COMPOST_TEMPERATUREsource contextual

Phase I heap temperature

65 to 70 °C
Stage
Phase I
Measurement context
Core of the outdoor long-method heap
Conditions
The heap should reach 65 to 70 °C in the core (ICAR-DMR farmer folder); ICAR-DMR treats 80 °C as the upper safe core temperature; Probe depth, time since turning and weather change the reading
COMPOST.MOISTURE.COMPOSTsource contextual

Finished compost moisture

64 to 72 %
Stage
Finished compost
Measurement context
Squeeze test or oven sample at spawning
Conditions
Synthetic compost 68 to 72 percent at spawning; natural horse-manure compost 65 to 67 percent; After tunnel Phase II ICAR-DMR reports 64 to 66 percent; Never spawn above 72 percent moisture
Evidence, applicability and review2 mapped sources

Sources support mechanisms and architecture. Technical and engineering values publish only through their separate governed registries.

Tier Afoundational

Mushroom Cultivation, Marketing and Consumption

Indian Button Mushroom compost methods, cultivation context, Phase I and Phase II process vocabulary.

Publisher
ICAR-Directorate of Mushroom Research
Accessed
2026-08-22
Open original source
Tier Cresearch

Influence of turning methods on temperature profile of Button Mushroom compost pile

Evidence that turning method, material and process system affect compost temperature behaviour.

Publisher
Mushroom Research, ICAR
Accessed
2026-08-22
Open original source

Read the evidence

Sources & review.

Editorial update: 2026-08-22. Independent technical review is not recorded for this entry.

  1. Mushroom Cultivation, Marketing and Consumption ↗

    ICAR-Directorate of Mushroom Research

  2. Influence of turning methods on temperature profile of Button Mushroom compost pile ↗

    Mushroom Research, ICAR · 2017

Reading a source is not the same as applying its instructions to every farm. Confirm species, strain, crop stage, system, region and publication date. Old chemical recommendations are not current-use instructions.

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