The sensitivity of amphibians is not being tested for the registration of pesticides. It is implicitly assumed that surrogate species are at least as sensitive as amphibians. Based on literature data, it will be shown that the acute sensitivity of amphibians is comparable to the sensitivity of fish and aquatic invertebrates. It can be said, that the acute risk of pesticides to amphibians in the aquatic system is covered by the risk assessment of fish and aquatic invertebrates. Long term effects and effects on terrestrial amphibians were not compared.
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.