“…As already mentioned in the introduction, the definition and prioritization of phosphate efficiency measures are strongly dependent on the available P in the target environment and on the harvested material being removed from the field. While the first factor is mainly influenced by the base P level and the soil type with its properties (Erel et al, 2017; Ibrahim et al, 2021; Leiser, Rattunde, Weltzien, Cisse, et al, 2014), the amount of fertilizer and the interaction of P with other plant nutrients (Frank Stephano et al, 2021; Weiß et al, 2021) as well as the management of the field (Nkebiwe et al, 2016; Xin et al, 2017), the latter is above all a question of the farm's operating mode. A dairy farm will harvest silage maize and in the next season resupply a part of the P to its fields in form of manure.…”