Question 1

What is Phase-1 composting for mushrooms?

Accepted Answer

Phase-1 composting is the outdoor aerobic fermentation of wheat straw mixed with chicken manure, bran, gypsum and urea from Day 0 to Day 9 of the 15–16 day compost cycle, on the slab (Day 0–3) and then in aerated bunkers (Day 3–9) with a core of 70-78°C. The mix is turned between bunkers on Day 3, 5 and 7 to achieve a dark brown, uniformly wet compost with 68-72% moisture and a strong ammonia smell (Phase-2 conditioning removes the ammonia) — the ideal substrate for Agaricus bisporus (button mushroom) cultivation.

Question 2

How much does a Phase-1 compost yard cost?

Accepted Answer

Phase I runs in the compost unit’s aerated bunkers, which we price with the tunnel: ₹6,46,000 ex-GST for the 20 T unit (up to 6 × 18×40 ft rooms) and ₹7,08,000 for the 30 T unit. The RCC slab, bunker walls and drainage are client scope — typically ₹8–10 Lakhs for 20 T and ₹12–14 Lakhs for 30 T. MushroomWale provides the complete yard design.

Question 3

What raw materials are needed for Phase-1 composting?

Accepted Answer

The key raw materials are: wheat straw (1000 kg per batch), chicken/poultry manure (300-400 kg), gypsum (30-40 kg), urea (5-7 kg), and water. For a 2-room farm, each batch uses approximately 2-2.5 tonnes of raw materials.

Question 4

How long does Phase-1 composting take?

Accepted Answer

From Day 0 to Day 9 of the 15–16 day compost cycle, from wetting the straw to filling the Phase-2 tunnel: wetting and mixing on the slab from Day 0 to Day 3, then the aerated bunkers from Day 3 to Day 9, turned between them on Day 3, 5 and 7, with the core held at 70-78°C and read at three points before each turn.

Question 5

What size platform do I need for composting?

Accepted Answer

For a 2-room (18×40 ft) farm, you need a 40×60 ft RCC platform. For a 6-room commercial farm, a 60×100 ft platform is recommended. The platform should have 6-inch walls, proper drainage slope (1:40), and a turning area equal to the composting area.

Question 6

Can I skip Phase-1 and buy ready compost?

Accepted Answer

Yes, many farmers buy Phase-2 ready compost — about ₹12-14/kg of compost (₹123-143/bag a bag). That removes the yard but raises the running cost: made on your own unit it is about ₹8-10/kg. On two 18×40 ft rooms the difference is about ₹8.0 lakh a year. The choice depends on scale and available space.

Question 7

What equipment is needed for Phase-1 composting?

Accepted Answer

The bunkers' air system (blowers, 8″ air mains, spigots, control panel) comes with our compost unit. On the slab you need a loader or JCB for mixing and turning, a water line, wheelbarrows and forks, a pH meter, a moisture meter and a long-probe thermometer.

Question 8

What is the C:N ratio for mushroom compost?

Accepted Answer

The ideal starting C:N (Carbon to Nitrogen) ratio for mushroom compost is 30-33:1. Wheat straw has a C:N of ~80:1, so nitrogen supplements (chicken manure, urea) are added to bring it down. By the end of Phase-1, the C:N should reach 17-20:1 for optimal mushroom growth.

Question 9

How do I know Phase-1 composting is complete?

Accepted Answer

Phase-1 compost is ready when: the temperature stabilizes at 70-75°C during the last turning, the color is dark chocolate brown, the ammonia smell is strong but the material is uniform throughout, moisture is 68-72%, and the straw breaks easily when pulled. The sweet, earthy smell comes after Phase-2 conditioning.

Question 10

What problems can occur during Phase-1 composting?

Accepted Answer

Common problems include: anaerobic conditions (bad smell from insufficient turning), excess moisture (waterlogging), low temperature (insufficient nitrogen), pest infestation (flies, mites), and uneven composting. Proper turning schedule and moisture management prevent most issues.

Question 11

Does MushroomWale provide composting training?

Accepted Answer

Yes, MushroomWale provides hands-on composting training as part of the turnkey farm setup. This includes a 3-day on-site training covering raw material selection, mixing ratios, turning schedules, quality checks, and troubleshooting. Training is also available standalone.

Question 12

Is Phase-1 composting subsidy eligible?

Accepted Answer

Yes, as part of the compost unit: MIDH pays 40% of the ₹30 lakh compost-unit norm, up to ₹12 lakh (50% in NE and Himalayan states). Under NHB it is priced with the rooms by capacity — one scheme or the other. NABARD pays no subsidy. MushroomWale prepares DPRs that include the compost unit.

Compost unit	Price (ex-GST)	Serves	Civil (client scope)
20 T (2 bunkers + tunnel)	₹6,46,000	Up to 6 × 18×40 ft rooms	₹8–10 Lakhs
30 T (2 bunkers + tunnel)	₹7,08,000	Up to 6 × 18×60 / 18×70 ft rooms	₹12–14 Lakhs

Phase-1 Mushroom Compost Preparation in India

What Is Phase-1 Mushroom Composting?

Why Compost Quality Determines Your Yield

MushroomWale Phase-1 Composting Setup

RCC Composting Platform

Raw Material Management

Turning Equipment

Quality Monitoring

SOP & Schedule Charts

On-Site Training

Phase-1 Composting Yard BOQ

Phase-1 Compost Unit Cost (2026)

Subsidy for Composting Infrastructure

Case Study

Mushroom Compost Unit — Kannauj, UP

Phase-1 Composting Timeline

Wetting & Mixing

Into the Bunkers

1st Turn

2nd Turn

Phase-I Complete

Phase-1 Composting FAQ

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