Effects of traditional and biodynamic farmyard manure amendment on yields, soil chemical, biochemical and biological properties in a long-term field experiment

By Johann G. Zaller, U. Köpke. Biology and Fertility of Soils, 2004

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Use and understanding of organic amendments in Australian agriculture: a review (2011, background): “Zaller and Köpke (2004) studied the effects of biodynamic composts and traditionally composted farmyard manure on soil chemical and biological properties over a 9-year period.”
Foliar Spraying of Vermicornpost Extracts: Effects on Fruit Quality and Indications of Late-Blight Suppression of Field-Grown Tomatoes (2006, background): “Organic amendments like farmyard manure or thermophilic compost have long been recognized as effective means of improving soil fertility ( Zaller & Kopke, 2004 ) and suppressing plant diseases (Hoitink & Fahy, 1986).”
Trichoderma inoculation and trash management effects on soil microbial biomass, soil respiration, nutrient uptake and yield of ratoon sugarcane under subtropical conditions (2009, background): “Zaller and Kopke (2004) also found improved biological activity and soil fertility due to addition of Trichoderma.”