1. Economic Assessment of Soil Sampling Densities for Variable-Rate Fertilizer Prescription

Soil sampling and laboratory analysis represent a substantial share of operational costs in precision agriculture, making sampling density a crucial management parameter. Sampling density defines the resolution at which soil spatial variability is captured and directly influences the accuracy of spatial interpolation and fertilizer prescription maps. Due to high operational costs, reduced sampling densities are commonly adopted in practice, despite their known effects on map quality. This study... L. Delgado Bejarano, B. , A. Novaes Da Silva, L.R. Amaral