Soil acidity is a major agricultural problem around the world due to the deleterious effects of aluminium (Al3+) and/or manganese (Mn2+) and/or nutrient deficiency on crop growth. Raising soil pH is the most common strategy to improve conditions of acidic soils. It is relatively simple to increase pH in the surface soil layer (0-10 cm) by applying soil amendments such as lime (CaCO3). However, acidity in subsoil layers (at depths greater than 10 cm) is difficult to correct due to the relatively low solubility of liming materials and the slow movement of the amendments down the soil profile. Organic amendment has been shown to increase soil pH at below the amended layer due to the movement of alkaline compounds (Butterly et al., 2013; Cassiolato et al., 2000; Cassiolato et al., 2002; Miyazawa et al., 2002; Wang et al., 2016). For this work, it was hypothesised that this effect may be influenced by the particle size of the organic amendment and that greater solubility of organic compounds, compared with lime, which may be more effective in ameliorating acidic soil below the depth of placement or incorporation.
|Title of host publication||Proceedings of the 10th International Symposium on Plant-Soil Interactions at Low pH|
|Place of Publication||Malaysia|
|Publisher||Universiti Putra Malaysia|
|Publication status||Published - 2018|
|Event||10th International Symposium on Plant-Soil Interaction at Low pH : 10th PSILPH2018 - Palm Garden Hotel IOI Resort, Putrajaya, Malaysia|
Duration: 25 Jun 2018 → 28 Jun 2018
|Conference||10th International Symposium on Plant-Soil Interaction at Low pH|
|Abbreviated title||Achieving Sustainable Food Production on Acid Soils|
|Period||25/06/18 → 28/06/18|
Nguyen, H., Moroni, S., Condon, J., Zander, A., & Li, G. (2018). Increasing subsoil pH through addition of lucerne (Medicago sativa L.) pellets in the surface layer of an acidic soil. In Proceedings of the 10th International Symposium on Plant-Soil Interactions at Low pH (pp. 51-53). Universiti Putra Malaysia.