LDSF Topsoil Exchangeable Calcium
This map shows the distribution of predicted topsoil (0-20cm) values for exchangeable calcium. Calcium is a critical plant nutrient, essential to cell wall structure and membranes. It is the third most concentrated element in plants. Low soil fertility is indicated by low levels (<2 cmolc kg-1) of exchangeable calcium (exch. Ca). It is important to recognize however, that even when exch. Ca is in an adequate range, high levels of exch. K, Mg or Na may cause plants to be deficient. High levels of K, Mg and Na may be dependent on factors such as parent material, irrigation regime, or fertilization practices. There were no predicted values for soils that were below the critical level that might indicate Ca deficiency. For the full report please click here.
This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.