SALINITY MANAGEMENT

The Challenge

Many superintendents deal with soil salinity problems, which have a major impact on soil and turf performance.

The Science

Different types of salts can cause various kinds of salinity problems. Proper analysis is required to make appropriate recommendations.

An irrigation water sample, in addition to a soil sample, is beneficial because soil salinity is most often a reflection of the relative salinity of the water.

Total salinity is measured by electro conductivity (EC). EC is a measure of total salts, both good and bad. Turf grass tolerance to total salinity varies, but in general as EC levels approach 1 (650 PPM Soluble Salts) the potential for a negative impact increases. Excessive salts impede nutrient uptake. Higher EC levels lead to imbalances in soil/water/air ratios, which in turn inhibit plant metabolism. This leads to reduced root growth, decreased turf grass quality, and less than optimum conditions.

If base saturation sodium becomes excessive (typically above 4% of cations), sodium reduction may be beneficial. Sodium degrades water and air movement in the soil because it deflocculates the soil colloids.

The redox Solution

Improve soil water/air relationships by facilitating the flushing of salts and flocculating soil colloids. Reduce overall salinity and improve soil structure to create a more optimum environment for plant growth. Three Redox products may be beneficial for salinity management: TurfRx SaltEx, TurfRx PeneCal, and TurfRx Ca.

TurfRx SaltEx

TurfRx SaltEx has a high affinity for sodium and the surfactant content facilitates leaching of salts. Use TurfRx SaltEx where total sodium content has exceeded 4% and EC is greater than 1. Apply 0.25 - 1 gallon per acre (0.75 - 3 oz./1000 ft2) to the soil monthly or as required.

TurfRx PeneCal

A reacted plant nutrient product high in surfactant and calcium. TurfRx PeneCal reduces water surface tension and delivers calcium to micro pore space due to the reacted calcium and surfactant. Use TurfRx PeneCal where soil EC levels are excessive or where water penetration is inadequate. Apply 0.25 - 1 gallon per acre (0.75- 3 oz./1000 ft2 ) to the soil every 4–6 weeks or as needed.

TurfRx Ca

A reacted plant nutrient high in calcium. TurfRx Ca is efficiently absorbed by plants. Use TurfRx Ca with TurfRx PeneCal where increased plant available calcium is required. Apply 0.25 - 1 gallon per acre (0.75 to 3 oz./1000 ft2 ) to the soil during periods of critical calcium requirements or as required.