4.4 Substrates for the production of mushrooms

4.4.1 For the production of mushrooms, substrates may be used, if they are composed only of the following components:

4.4.2 Farmyard manure and animal excrements (including the products referred to in indents 1 to 4 Sections 10, Table 1).

(a) either from holdings producing according to the organic production method;
(b) or satisfying the requirements referred to in Section 10 Table 1, indents 1 to 4 as follows:
  Farm yard manure,
  Liquid animal excrements,
  Composted animal excrements, including poultry manure and composted farmyard manure,
  Dried farmyard manure and dehydrated poultry manure.

only up to 25%(*), and only when the product under 4.4.2 is not available;

4.4.3 Products of agriculture origin, other than those covered under 4.4.2 (e.g. straw), from holdings producing according to organic production methods;

4.4.4 Peat not chemically treated;

4.4.5 Wood, not treated with chemical products after felling;

4.4.6 Mineral products of Section 10 Table 1, water and soil.
(*) This percentage is calculated on weight of total components of the substrate (excluding the covering material and any added water) before composting.