6675 Highway 15
Seeleys Bay, ON K0H 2N0

Surface application of limestone and calcium-magnesium silicate in a tropical no-tillage system

Research paper summary
Although lime is currently the most commonly applied material for soil acidity correction in Brazil, calcium- magnesium silicate application may efficiently replace this source due to its higher solubility and silicon supply, which is beneficial for plant development. This study aimed to evaluate the efficiency of surface liming and silicate application on soil chemical attributes as well as soybean and maize nutrition, yield components, and grain yield. The experiment was conducted in a Rhodic Hapludox in Botucatu-SP, Brazil. After 18 months Ca-Mg silicate corrected soil acidity up to 0.60 m and increased exchangeable base levels up to 0.40 m. Silicate increased silicon concentrations in plant tissues in both crops as well as phosphorus in soybean. The application of both sources increased calcium and magnesium concentrations as well as yield components and yield grains of soybean and maize. Soil acidity correction improved the efficiency of fertilizers applied for grain production.

Read the full abstract and paper: Surface application of limestone and calcium-magnesium silicate in a tropical no-tillage system.pdf