Sodic Soil: Effects, Properties, and Treatment
Sodic soils are formed when sodium ions are relatively higher than the other cations, impacting the soil structure. The amount of sodium in the soil is the key measure of sodicity and is referred to as the Exchangeable Sodium Percentage (ESP). Sodicity in soil degrades soil properties by weakening the bond between soil particles.
Managing Sodic Soils - 0.504 - Extension
Soils with high levels of exchangeable sodium (Na) and low levels of total salts are called sodic soils. Sodic soils may impact plant growth by: 1.) Specific toxicity to sodium sensitive plants; 2.) Nutrient deficiencies or imbalances; 3.) High pH; and 4.) Dispersion of soil particles that causes poor physical condition of the soil.
Sodic Soil - an overview | ScienceDirect Topics
Sodic soil or soil sodicity may refer to: saline soil (Sodic), a soil with excess salts where sodium chloride (NaCl) predominates, and alkaline soil (Sodic), a soil with a high pH (>8.5) due to the presence of excessive sodium carbonate (Na2CO3).
Sodic Soil - an overview | ScienceDirect Topics
Sodic soils (Alkali soils) are characterized with high concentration of sodium ions (sodium salts) adsorbed on the soil exchange complex (clay particles) of the soil. Sodium saturation of clay particles causes dispersion of soil particles resulting damage/poor of soil structure that results an increase in the compactness of soil, decrease in ...
4. SODIC SOILS AND THEIR MANAGEMENT - Food and …
The chief characteristic of sodic soils from the agricultural stand point is that they contain sufficient exchangeable sodium to adversely affect the growth of most crop plants. For the purpose of definition, sodic soils are those which have an exchangeable sodium percentage (ESP) of …
Saline-Alkali (Sodic) Soils: Definition, Classification and Distribution
Alkali or sodic soil is defined as a soil having a conductivity of the saturation extract less than 4 dSm -1 (0.4 Sm -1 or 4 mmhos cm -1) and an exchangeable sodium percentage (ESP) greater than 15. The pH is usually between 8.5-10.0.
Saline and Sodic Soils: Identification, Mitigation, and Management ...
It explains how soil salinity is measured and presents innovative strategies for preventing and mitigating soil salinity through management and addition of organic material. The presence of excess salts in the ground is a far-reaching and expanding threat to agriculture across the globe.
Managing Saline and Sodic Soils and Irrigation Water
To effectively manage soil salinity and sodicity, it is important to know the EC and SAR of both the soil and the irrigation water. It is also important to know the grown crop’s salt tolerance. Salinity and sodicity problems are best avoided by using high-quality water for irrigation.
Sodic soils are low in total salts but high in exchangeable sodium. The combination of high levels of sodium and low total salts tends to dis-perse soil particles, making sodic soils of poor tilth. These soils are sticky when wet, nearly impermeable to water and have a slick look. As they dry, they become hard, cloddy and crusty.
Sodic & Alkaline Soil - Soil Quality Knowledge Base
Soil affected by sodicity and alkalinity has multiple chemical constraints that combine to limit crop yield potential. Under the broad classification, sodic soil accounts for 57% of the 18 million hectares of arable soil in the Western Australian wheatbelt.