Amelioration of subsoil acidity using inorganic amendments

Abstract

Key findings • • Deep ripping had an adverse effect on crop establishment and crop yield in the establishment year. • • Both lime and magnesium silicate (a blended product of 70% Doonba dunite and 30% F70 lime) were capable of increasing soil pH and decreasing exchangeable aluminium (Al) at the 20–30 cm depth where the soil amendment was applied. • • Deep placement of gypsum had no effect on soil acidity and did not improve grain yield.