Nmin-Probenahme und Analytik im Nitratprojekt Niederbipp-Gäu-Olten (Kantone SO und BE)

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A central component of the nitrate project under Article 62a of the Water Protection Act to reduce nitrogen losses into groundwater is site- and requirement-based fertilisation. For this purpose, the farms must fertilise their parcels within the project perimeter either using the Nmin method or using the method of corrected standards in accordance with the principles for fertilising agricultural crops in Switzerland (GRUD 2017). This service contract includes the collection and analysis of soil samples for Nmin analytics. On the basis of these Nmin analyses, farmers receive fertilisation recommendations from the cantonal advisory services. Brief description of Nmin sampling: * Project management (planning, meetings, data management, reporting), * travel to the parcels, * machine and, in part, manual collection of soil samples in the field (composite sample from a specified number of auger bore insertions) for each of 3 depth levels in arable farming (0-30cm / 30-60cm / 60-90cm) and 2 to 3 depth levels in vegetable growing (0-15cm / 15-30cm / 30-60cm) according to the reference methods A 1.1 and A 1.2 VDLUFA (Methods book Volume I Soils (basic work 1991) – VDLUFA…

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