The knowledge pertaining to phyto-availability of potassium (K), calcium (Ca) and magnesium (Mg) in soils and K, Ca and Mg concentrations in plant tissues and their relations in different productions systems of the world is limited. Understanding soil and leaf K, Ca and Mg concentrations and their stoichiometry in oil palm (Elaeis guineensis Jacq.), a globally demanding crop for vegetable oil production, is important for efficient K, Ca and Mg management. We, therefore, collected soil and leaf samples from oil palm plantations (OPP) established on three different soil series of India, and analysed to assess soil properties (pH, electrical conductivity, soil organic carbon) and concentrations of exchangeable K (Ex. K), Ca (Ex. Ca) and Mg (Ex. Mg) in soil and leaf K, Ca and Mg concentrations and their stoichiometry, and to visualize their relations. Soil properties, concentrations of Ex. K, Ex. Ca and Ex. Mg and their ratios in OPP of different soil series varied widely and differed significantly. The mean concentrations of Ex. K, Ex. Ca and Ex. Mg in OPP of Jangareddigudem and Madukkur series followed the order: Ex. Ca > Ex. Mg > Ex. K. However, soils of OPP of Karmali series had higher mean concentration of Ex. Ca followed by Ex. K followed by Ex. Mg. Leaf K, Ca and Mg concentration and their ratios in oil palm plantations of all the three-soil series varied widely and differed significantly. The mean concentrations of leaf K, Ca and Mg followed the order: Ca > K > Mg. There were positive and significant correlations of Ex. K with Ex. Ca in soils of Jangareddigudem and Madukkur series. Leaf Ca concentration was negatively and significantly correlated with leaf K concentration and Ex. K and Ex. Mg in soils of Jangareddigudem series. There were no correlations of leaf K, Ca and Mg concentration with Ex. K, Ex. Ca and Ex. Mg in soils of Madukkur and Karmali soil series. This study highlighted the need for maintaining equilibrium concentrations of Ex. K, Ex. Ca and Ex. Mg in soils for ensuring proper K, Ca and Mg nutrition of oil palm.

关于土壤中钾（K），钙（Ca）和镁（Mg）以及植物组织中K，Ca和Mg浓度及其在世界不同生产系统中的关系的植物有效性的知识是有限的。了解油棕中土壤和叶片中钾，钙和镁的浓度及其化学计量雅克（Jacq。）是全球需求量很高的植物油生产作物，对于有效地管理钾，钙和镁非常重要。因此，我们从建立在印度三个不同土壤系列上的油棕种植园（OPP）收集了土壤和叶片样品，并进行了分析，以评估土壤特性（pH，电导率，土壤有机碳）和可交换K的浓度（例K）。 ），土壤和叶片中的Ca（Ex。Ca）和Mg（Ex。Mg），Ca和Mg浓度及其化学计量关系，并可视化它们之间的关系。土壤特性，Ex浓度。K，例 Ca和Ex。不同土壤系列中OPP中的Mg及其比例差异很大，差异也很大。Ex。的平均浓度 K，例 Ca和Ex。Jangareddigudem和Madukkur系列的OPP中的Mg遵循以下顺序：例如。Ca> Ex。镁>例 K.但是 Karmali系列OPP土壤中的Ex的平均浓度较高。Ca，接着是Ex。K，后跟Ex。镁 在所有三种土壤系列中，油棕人工林叶片K，Ca和Mg的浓度及其比例差异很大，差异也很大。叶片K，Ca和Mg的平均浓度遵循以下顺序：Ca> K> Mg。Ex呈正相关和显着相关。K与Ex。在Jangareddigudem和Madukkur系列土壤中的钙。叶片Ca浓度与叶片K浓度和Ex呈显着负相关。K和Ex。Jangareddigudem系列土壤中的镁。叶片中的钾，钙和镁的浓度与Ex无关。K，例 Ca和Ex。Madukkur和Karmali土壤系列中的镁。这项研究强调了保持Ex平衡浓度的必要性。K，例 Ca和Ex。