The fertilizer applicator was filled with triple super phosphate (0-45-0). Each sampling cell of approximately 4 m2 (1.25 by 3 m) received an application rate according to the Pal level obtained by soil sensor for this cell. The application rate was adapted in 5 kg P ha-1 intervals. The planter was adjusted for 100,000 seeds per hectare for sowing maize (Zea mays L.) in 0.75 m wide rows. Although the travelling speed for row-crop planting is about 5-6 km h-1, the planter-applicator was driven at a travel speed of 2 km h-1 gathering average soil spectrum throughout approximately 1.25 m distance intervals, while travelling across the field. The entire field received a uniform rate of 180, 150 and 70 kg ha-1 of nitrogen, potassium and magnesium, respectively.