Zica, Lincoln Fonseca, and Peter Ernst Sonnenberg. “INFLUENCE OF AMMONIACAL FERTILIZERS IN THE MAIN ROOT BRANCHING OF CARROT (Daucus Carota L.)”. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], vol. 1, no. 1, Sept. 2007, pp. 22-26, https://doi.org/10.5216/pat.v1i1.1657.