Articles

Manure Odor and Fly Management by James C. Silverthorne

Published by The Josephine Porter Institute

About Manure Odor

Rudolf Steiner: “… if we just leave the pile of compost as I described it hitherto, it may easily come about that it will scatter its astral content on all sides. … We must try to bring the compost-heap into such a condition that it smells as little as possible. … That which would otherwise evaporate and scatter its scent abroad, is thereby held together. The nitrogen, in fact, is that which strongly tends to seek the wide expanse – in manifold forms and compounds. Now it is held together.” Agriculture, p. 71. Emphasis added.

Our Comment: Raw manure at livestock shelter areas, before its composting, is best managed so that it does not emit its nitrogen noticeable as odorous compounds (ammonia, etc.). Odors/volatiles commonly produced by fresh and decaying manure and urine (1) indicate loss of natural nitrogen from the farm, then become atmospheric pollutants (2) on inhalation, threaten animal health (3) readily attract pest flies to the area of odor-producing materials. The same materials not producing odors appear to not attract flies.

Please see Pfeiffer™ Compost Starter and the Maria Thun BC (Biodynamic Compound) as options to prevent production of odors from accumulations of uncomposted manure. Compost Starter may be applied again while building the heap. As usual, the individual compost preparations are applied to the completed compost heap.

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Manure Odor/Fly Management: Engaging the Farm's Ecological Advantage by James C. Silverthorne. Reprinted from Acres USA, June 2014, Vol. 43, No. 6.

Ideal Manure Odor-Fly Prevention at Livestock Shelters by James C. Silverthorne (Expanded)

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2 commentaires

Oh yes! I see it above, good going adding the questions related to the JPI products, excellent idea!

James Silverthorne

Hi – Where is the pdf for my article, Manure Odor and Fly Management, posted 2017? Thank you, JS

James Silverthorne

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Questions fréquemment posées

What causes manure odor?

Manure and urine can release volatile compounds as they decompose, including ammonia, hydrogen sulfide, and skatoles. Wet or accumulated manure and bedding make these odors more noticeable in livestock shelters.

How can I reduce manure odor?

Keep bedding absorbent and relatively dry, ventilate the shelter, and move soiled material into a managed compost area. Silverthorne estimated 90%+ less odor after soft rock phosphate treatment at his horse stable. Separately, JPI lists Pfeiffer Compost Starter and Maria Thun BC as biodynamic options for uncomposted manure.

Why is manure odor a concern?

Odorous manure can signal ammonia loss, and some manure volatiles attract pest flies. Silverthorne highlights the value of fresher air around livestock shelters and managed composting that returns organic materials to the soil.

What are compost starters?

Pfeiffer Compost Starter is a JPI biodynamic starter used as a compost pile is built. JPI also lists Maria Thun BC as an option for uncomposted manure. Both fit within a complete management routine of suitable moisture, airflow, bedding, and regular manure handling.