Yield benefits and economics of crushing sheet laterite ...
Results. Soil test results taken shortly after rock crushing showed no notable differences between paired treated and untreated plots. However, samples taken at a site with ironstone sheet at 0-3cm showed a high phosphorous buffering index (PBI) of 78 in both treatments compared to sites with ironstone sheet below 3cm depth that had a lower PBI of 28 (Table 2).