Alteration of chemical attributes of a yellow oxisol by surface liming in area under mango crop.
Araújo F. S., Salviano A. A. C., Coelho Filho A. D.
Author Affiliation: Universidade Estadual de Campinas (UNICAMP), Campinas, SP, Brazil.
Semina: Ciencias Agrárias (Londrina) 30 : 753-760
Abstract : This study was conducted to determine the effect of different limestone rates (0, 0.5, 1.0 and 2.0 t ha-1) on soil (yellow Oxisol) acidity and Ca2+ and Mg2+ contents at different soil depths in an area already planted with mangoes. The experiment was conducted in the experimental field of the Soinho's Agricultural Family School, in Teresina, Piaui, Brazil. Samplings were accomplished at 4, 8 and 16 months after the application of the limestone. In each plot, 4 simple samples were collected to form one bulked sample in the depths (0.00-0.05; 0.05-0.10; 0.10-0.15 and 0.15-0.20 m). The results were subjected to variance and regressions analysis, according to the procedure of the SAS software. The effect of limestone application on soil surface pH, and Al3+, H+, Al3+ and Mg+2 contents was intensified in function of time.