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, […]
Nutrition and yield of macadamia nut tree as a result of split application of mineral fertilizer
01/Jun/2014
Nutrient availability during the year can affect the performance of macadamia (Macadamia integrifolia). However, there is no information about this crop responses to split application of fertilizer under Brazilian conditions. The aim of this study was to evaluate the influence of splitting the application of chemical fertilizers on the nutrition, yield, and quality of nuts of the macadamia nut tree. The experiment was conducted over three growing seasons on an Oxisol in Jaboticabal, State of São Paulo, Brazil. A randomized […]