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| Friedel, Jürgen K.; Kasper, Martina; Schmid, Harald; Hülsbergen, Kurt-Jürgen; Freyer, Bernhard. |
| On organic farms, phosphorus (P) balances are often negative because no or little P is imported into the farms. Negative P balances may deteriorate P availability over time. We calculated P balances of the main farm production types in organic farming for the main Austrian production areas. Using data from various data bases and expert knowledge, we applied the sustainability assessment tool REPRO for calculations. The P balances were balanced to slightly deficient for organic forage dairy farms, cash crop farms and permanent crop farms, and slightly to highly surplus on organic refinement, pig producing farms. Deficient P balances, mainly on organic cash crop farms, call for P input especially on farms where available P fractions in the soil are very low... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Composting and manuring Recycling; Balancing and resource management Nutrient turnover Air and water emissions. |
| Ano: 2014 |
URL: http://orgprints.org/23853/1/23853_Friedel_MM.pdf |
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