PERMFILE52059 - Laserfiche WebLink

Home Browse Search

Copper - This micronutrient is an activator of several enzymes in plants. It may play a role in vitamin A production. A deficiency interferes with protein synthesis. Soltanpour (1985) reported high concentra- tion of Cu >.5 mg/kg. Merritt (1983) suggested suspect levels of Cu to be >40 ppm. Brady (1974) reported an average range of Cu in soils to be 5-150 ppm. Actual spoils at Trapper ranged from .7 to 6.8 ppm (z =4.3). Selenium - Selenium is not considered an essential element for plant growth and development, however, the element is essential to animal nutrition; Fisker et al (1981) reported an adequate intake for live- stock diets to be .l-1 ppm. Soltanpour (1985) reported high concen- trations of Se in soils to be .1 ppm while Merritt (1983) reported high concentrations at >2 ppm. Suitable values are generally <1 ppm. Actual range of Se in Trapper spoils was .008 to .214 ppm (x _ .07). (1986-87 only.) Calcium, Magnesium, Sodium -With the saturated extract method Ca, Mg and Na in the soil solution are in equilibrium with absorbed cations and easier measurements can be made of soluable, saturation extract cations versus exchangeable cations These water soluable values were measured so SAR could be calculated. The analysis measures the distribution of soluable salts in solution and based on high SAR values will identify problematic salt components, particularly Na. Sodium Adsorption Ratio - Ratio used to estimate the percentage of charge on the soil colloid that is satisfied by adsorbed sodium. The degree of suitability as reported by Merritt (1983) and others is good for SAR values below 6. Suitable SAR values are < 12. Trapper spoils ranged from .1 to 7.9 (z = .7). Percent Saturation - Saturation percentage is the amount of water by weight, necessary to form a minimally flowable mud from dry soil material. Saturation percentage is a useful parameter for detecting low water holding capacity and clarifying the degree of sodic hazard as indicated by SAR. Several authors have recommended that 25 per- cent saturation percentage be used as an indicator point for signi- ficantly low water holding capacity, and that 80 to 95 percent satu- ration percentage be used as an indicator point for swelling ten- dency associated with sodic soils. Percent Saturation on Trapper spoils ranged from 30.1 to 53.1 (z = 42). Percent Sand - This is the percent of the soil that consists of particles between .OS and 2.0 mm in diameter. Generally, soils with a 70% or greater sand content are suspect (Merritt 1983). Actual Trapper spoils ranged from 14% to 67% (z = 33.4%). Percent Silt - This is the percent of the soil material consisting of ~ -~ particles between .OS-.002 mm in diameter. Trapper spoils ranged from 15% to 70% (z = 30.9%). cont.