WASET
    Rachel Bardy Prado and  Vinícius de Melo Benites and  José Carlos Polidoro and  Carlos Eduardo Gonçalves and  Alexey Naumov,  Mapping Soil Fertility at Different Scales to Support Sustainable Brazilian Agriculture.   journal   = {International Journal of Agricultural and Biosystems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2012, vol. 69(9). 769 - 777
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/11111.