Generally speaking, cattle sheds are naturally ventilated buildings. Because of this, the situation is different on both the emission and impact sides than for animal housing with forced ventilation. This paper highlights methods contributing to the clarification of odour complaints. Using a case study, a process is explained with an analysis of the nuisance and site situation, the husbandry method and the management strategy. The emission situation is characterised by the individual sources in the categories «housing», «feed store» and «farmyard manure store», in combination with the operating approach. Of importance in terms of the residents’ perception of odour are the specific site, meteorological aspects, and additional emitters. In planning processes, particular care in the siting of animal housing systems is advisable owing to the potential impact on residents. To date, and where already existing sites, extended diffuse sources, natural ventilation, and – in particular – constellations with cold-air outflows are concerned, the starting points for odour reduction have been few in number. In the case of individual complaints, as holistic a methodological approach as possible helps us to take the odour complaints seriously and arrive at situation-appropriate solutions that are as amicable as possible.
Symbiotic nitrogen fixation by bacteria in the soil coexisting with legumes leads to reduced fertiliser requirement. It is not easy to measure this variable on farms, however. Now researchers from Agroscope have developed a method for estimating nitrogen input via symbiotic fixation at farm level.
With increasing global and regional temperatures, even in Switzerland the growing season has lengthened considerably. Using data from the Federal Office of Meteorology and Climatology, Agroscope has traced the development of the growing season since the start of the previous century.
The phosphate mineral reserves required for fertiliser production could be exhausted on a global scale in just a few decades. This study presents a method for recycling a Swiss industrial by-product into a phosphate fertiliser.