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Soil properties and pH of the extractors influence extraction and availability P in alkaline soils from the São Francisco Valley, Brazil
Patryk Ramon Graciano Rosa Wandersee 
, Maria Betânia Galvão dos Santos Freire , Fernando José Freire , Suellen Roberta Vasconcelos da Silva , Jailson Cavalcanti Cunha
12/Nov/2025
ABSTRACT Phosphorus (P) is one of the most used nutrients in agriculture due to its high degree of interaction with the soil. It is susceptible to calcium precipitation in poorly weathered and alkaline soils, such as those in the Brazilian Semi-Arid region. Mehlich-1 is the most used extractor to evaluate P availability in this region. However, there are controversies regarding the efficiency of Mehlich-1 and the anion exchange resin (AER) has been an alternative extractor to evaluate P availability. However, […]
