soils with deep surface horizons of volcanic ash and relatively deep organic matter, typically more moist and found along riparian areas (most productive for within this LTA). Andic S. marilandica these soils have less than 10 inches of ash over poorly developed soils and are moderately Haploxerepts, supportive of within this LTA. S. marilandica SUMMARY OF LTA SOIL RESULTS AND INTERRELATIONSHIPS For each soil sample site, Table 1 below will list the corresponding LTA, soil type, and soil test results. A discussion below the table will touch on the interrelationships between each of these factors and how conducive they are to S. marilandica. The optimum range for calcium in soil samples is between 600-4000 ppm. The optimum range for CEC for the soil types collected is between 25-33 meg/100g. 1: Summary of Soil Sample Results from Areas Surveyed Soil Sample Site LTA Common Soil Type Available Calcium CEC Test Result Test Result (ppm) (meg/100g) *** *** Early Winters Creek Nu2 Vitrixerands Excessive 66.0 (Upper Methow (11200 ppm) River Watershed). No plants found Twisp River Nj2 Typic Vitrixerands Optimum range 25.0 Watershed. No (2400 ppm) plants found. Chewuch Nu2 Typic Vitrixerands Above optimum 38.0 River Watershed (4120 ppm) at large known population (1000 + plants) Chewuch River Nu2 Typic Vitrixerands Optimum 33.6 Watershed at known (2740 ppm). population (8 plants) San Poil River Mu2 Vitrandic Optimum range 7.5 Watershed at known Haploxerepts (699 ppm) population (75 plants)
soils with deep surface horizons of volcanic ash and relatively deep organic matter, typically more moist and found along riparian areas (most productive for S. marilandica within this LTA). Andic Haploxerepts, these soils have less than 10 inches of ash over poorly developed soils and are moderately supportive of S. marilandica within this LTA. SUMMARY OF LTA SOIL RESULTS AND INTERRELATIONSHIPS For each soil sample site, Table 1 below will list the corresponding LTA, soil type, and soil test results. A discussion below the table will touch on the interrelationships between each of these factors and how conducive they are to S. marilandica. The optimum range for calcium in soil samples is between 600-4000 ppm. The optimum range for CEC for the soil types collected is between 25-33 meg/100g. 1: Summary of Soil Sample Results from Areas Surveyed Soil Sample Site LTA Common Soil Type Available Calcium Test Result (ppm) *** CEC Test Result (meg/100g) *** Early Winters Creek (Upper Methow River Watershed). No plants found Nu2 Vitrixerands Excessive (11200 ppm) 66.0 Twisp River Watershed. No plants found. Nj2 Typic Vitrixerands Optimum range (2400 ppm) 25.0 Chewuch River Watershed at large known population (1000 + plants) Nu2 Typic Vitrixerands Above optimum (4120 ppm) 38.0 Chewuch River Watershed at known population (8 plants) Nu2 Typic Vitrixerands Optimum (2740 ppm). 33.6 San Poil River Watershed at known population (75 plants) Mu2 Vitrandic Haploxerepts Optimum range (699 ppm) 7.5
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