A new fertilization guideline (PRIF) that replaces the old guideline of 2003 was published in June 2017. The date of entry into force is, however, not yet fixed. It represents state-of-the-art research into fertilisation and the development of production techniques. They are an indispensable decision making tool for agricultural advisers and farmers regarding the fertilisation of agricultural crops, and a reference database for Swiss federal government and cantonal enforcement tools, such as Suisse-Bilanz.
The new guideline includes all agricultural crops using a modular approach. Thereby, a chapter for fruit production is included in the new guideline. In this chapter there are sections covering the topic of how to take soil samples, interpret them and how to calculate fertilization amounts out of this information. This chapter also includes a section covering deficiency symptoms.
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