Keywords: soil phosphorus; fertilisation recommendation; crop based; soil based; soil test.
Given the current challenges concerning limited world phosphorus (P) reserves and environmental issues it is increasingly important to optimise the use of phosphorus reserves already present in agricultural soils. Soil phosphorus reserves have accumulated over previous decades in different areas in the world, including the Netherlands. However, until recently, these reserves were only poorly taken into account in phosphorus fertilisation recommendations. In a new innovative methodology recommendations have been adapted to include an accurate prediction of the potential of soils to supply phosphorus. In this paper we discuss the whole process of developing and implementing this methodology which entails:
– studying the dynamic soil phosphorus processes;
– interpretation of the results in terms of intensity, buffer capacity, and quantity;
– translation to a combination of soil tests minimally needed to predict the phosphorus supply potential;
– testing in pot trials and field experiments;
– developing accurate and generally lower fertiliser recommendations;
– implementation in practice.
A M D (Debby) van Rotterdam1, D W (Wim) Bussink1 and J A (Arjan) Reijneveld2
1 Nutrient Management Institute, Binnenhaven 5, 6709PD, Wageningen, The Netherlands.
2 BLGG AgroXpertus, Binnenhaven 5, 6709PD, Wageningen, The Netherlands.
24 pages, 7 figures, 1 table, 43 references.