A laboratory study showed that water treated with Calcine® generated soil samples that retained 40 percent more water than soil irrigated with water alone. The same study showed that Calcine-treated water removed up to 45 percent more salts than untreated water.
With heavy irrigation, soils often accumulate salts, a condition that leads to even more irrigation in an effort to leach the salt below the root zone. On affected farms, water use increases, plant performance declines and bottom-line margins tighten. Sodic soils also negatively impact soil structure by breaking down soil aggregates, leading to soil compaction, sealing and reduced water-holding capacity. Biological activity also slows, further harming soil structure and plant growth.
When added to irrigation water, Calcine has been shown to effectively mobilize salt out of soil. This occurs through leaching, or carrying salts down through the soil profile and away from roots.
Salts eliminated through Calcine application can be replaced by higher-value nutrients.
We recommend applying calcium to Calcine-treated fields to help flocculate the soil. Calcium helps open sealed soils by replacing sodium previously bound to the soil. When sodium is replaced by calcium and other nutrients, soil fertility, structure and permeability improve.
2016 laboratory studies showed Calcine reduced soil salt levels by as much as 45 percent over the untreated control.
In the study, cylinders were filled with sodic soil collected from Arizona. They were then fully wetted using three treatments: untreated control (water), the equivalent of ¼ gallons per acre of Calcine and the equivalent of ½ gallons per acre of Calcine (in water). Soil in the cylinders was kept moist for 28 days and later flushed with 200 ml of water. Flow-through was then collected for analysis.
Flow-through water from the untreated control contained 960 ppm of total salts. In comparison, flow-through from the treated cylinders was as high as 1,400 ppm.
This means nearly 50 percent of the salts were carried away by the flush-through of water. A summary analysis can be found in Table 1.
This same study supports our finding that Calcine application improves soil water-holding capacity. Of the 200 ml of water used to flush each cylinder, over 40 percent less water was collected from the treated cylinders.
Calcine-treated soils held water better than the control in all treatments, suggesting that on-farm water use can be dramatically reduced following Calcine application.
We saw a similar result on an Arizona alfalfa grower’s farm in early 2015. Calcine application there reduced water use by 63 percent after just four months of treatment while improving yield (see Table 2). When water-holding capacity increases, plant tolerance to drought and flood conditions also improves. These benefits can improve plant performance while cutting production costs.