Aspectos técnicos e econômicos da calagem: uma revisão

Abstract

The objective of this work was to analyze historical data related to the use of liming as national limestone reserves, production and demand for national agricultural limestone and focusing on the State of Rio Grande do Sul. The variations of production and demand were related to historical political and economic facts that influenced Brazil and, consequently, agricultural limestone. Also a comparison of a projection of limestone production in the period from 2009 to 2030 with the production obtained up to the year 2017, in which there was no correspondence with the current days, with current production showing an overrun of the values of the projection of 2009 to 2030. The use of data from the scientific literature was done to determine the average productivity of cultivars with the use of limestone in the no-tillage system, demonstrating that there is an improvement in the final yield of the crops with the use of agricultural limestone. A correlation with historical crop productivity data in the State of Rio Grande do Sul with its production of agricultural limestone was made, in that, because of their similar behavior, it can be considered that agricultural limestone is possibly one of the factors influencing agriculture and the economy from the country. With this demonstrating that liming is an effective and necessary method to prove that with its use over the years it has led to a rise in the pattern of agricultural production in Brazil.