Análise química do solo para fins de fertilidade e recomendação de adubação.

Abstract

Soil science encompasses a broad study, among which we highlight the assessment of land fertility that support classification, mapping and, above all, soil management practices, such as liming and fertilization, which are essential for optimizing plant productivity. This research objetive to disseminate fundamental information for a soil fertility analysis program, covering information regarding soil sampling, analytical procedures, instrumentation and methodologies used, issuance of technical reports, interpretation of results and fertilizer recommendation to farmers. This study was based on bibliographic search ased on the above, the main scope of this work is to disseminate, in academic and rural areas, technical support that is essential for conducting a soil analysis program for fertility purposes. Its content covers the techniques used during soil sampling, knowledge of the instruments used, the dynamics of analytical procedures in the laboratory and the issuance and interpretation of technical reports for the recommendation of fertilization to farmers. Emphasis is given to instrumental methods of chemical analysis, such as titration, colorimetry, potentiometry, conductometry and flame photometry. The methodologies used during laboratory analyzes are also presented. For each chemical determination, the objective, principle of the method, apparatus, reagents, solutions and the procedure used are mentioned. The work ends with explanations regarding the calculations involved during the preparation of chemical extractors, standard curves and units used in soil analysis, according to the international system (SI). Also, the procedures used in the interpretation of the resul