[Compost making. An interesting production branch for agriculture]

agricultural wastes aguas residuales available days besoin en main d'oeuvre biodegradation compost compostage composting composts costos costs demanda de trabajo environmental impact equipment equipo impact sur l'environnement impacto ambiental jours disponibles labour requirements organisation du travail pollution procesamiento processing suisse suiza switzerland temperatura temperature traitement wastewater work organization