A 'CNP flows interactive model' has been developed in order to illustrate the effects of CNP management at farms. The model can be used for observation of the combined effects in the entire manure / crop / feed loop of on-farm measures, such as employment of various livestock manure processing technology. Comparing CNP flows of slurry separation and composting scenarios with that of a NVZ Baseline Model illustrates clearly that these two manure processing technologies represents 'low hanging fruits' with respect to possible policy measures in support of the goals of EU’s Farm-to-Fork strategy concerning N and P nutrients as well as EU’s climate goals concerning greenhouse gas emissions. Slurry separation is a simple, cheap and straightforward solution for obtaining full recycling of P in farming, whereas composting should be banned for is massive N and P pollution of the environment and its devastating climate effect due to large losses of greenhouse gases.