Agricultural Outfits Model AST-5 and Model SDT-15 Advanced Agricultural Soil Testing Outfits This line of combination soil analysis outfits offers the finest visual color matching system available to today's agronomist. Technically advanced reagent systems and unique extraction procedures based on the Mehlich I extraction provide fast, simple and extremely accurate soil testing. Soil nutrients are drawn from the test sample, providing a clear liquid extract. The addition of an indicator reagent to the clear extract produces a color reaction in direct proportion to the nutrient concentration in the test solution. The developed color is read against permanent, translucent color standards provided in the Octa-Slide Comparator. The result is a simple and distinct color match over a broad test range.
Tests for calcium, magnesium and chloride are performed with an easy-to-use direct Reading Titrator. Reagent is dispensed into the sample solution extract until an end point color change is reached, then results are read directly form the titrator in parts per million. Measurement of potassium is conducted with a unique turbidity tube system. Copper is determined by means of a drop count method, and humus is measured against a color chart index with five color standards. The AST outfits also include simplified procedures for screening of nitrates, phosphorus and potassium in plant tissue. Both Model AST outfits are furnished in rugged, lightweight carrying cases with components securely mounted in removable foam-lined trays. This format permits easy conversion from an in-store lab to service in the field. Each kit includes simplified and complete instructions, a pad of soil analysis report forms, instructions for collecting representative soil samples and a copy of the LaMotte Soil Handbook. This handbook contains charts with data on the nutrient needs of various crops. It also contains general information on using soil test results to determine actual lime and fertilizer requirements for optimal plant growth. Available in two models. See charts.	AST - 15 Test Factor # Tests Range* pH 100 pH 4.5 - 8.0 Nitrate Nitrogen 100 2.5 - 100 lbs/acre Phosphorus 100 15 - 150 lbs/acre Potassium 100 L-H 120 - 200 lbs/acre Humus (Organic Matter) 100 L-H 1.5% - 8% Calcium 100 0 - 200 ppm Magnesium 100 0 - 120 ppm Ammonia Nitrogen 100 10 - 80 lbs/acre Manganese 100 L-H 4 - 40 ppm Aluminum 100 L-H 5 - 125 ppm Nitrite Nitrogen 100 0.5 - 25 lbs/acre Sulfur 100 0 - 100 ppm Chloride 100 0 - 100 ppm Ferric Iron 100 2.5 - 5.0 ppm Copper 100 0.25 ppm/drop
AST - 5 Test Factor # Tests Range* pH 100 pH 4.5 - 8.0 Nitrate Nitrogen 100 2.5 - 100 Lbs/acre Phosphorus 100 15 - 150 lbs/acre Potassium 100 L-H 120 - 200 lbs/acre Humus (Organic Matter) 100 L-H 1.5% - 8% 511901 Macronutrients, pH, & Humus, Model AST-5 (15#) $427.90 511911 Reagent Refill, Model AST-5 (10#) $293.90 511801 Macronutrients, Micronutrients, & pH, Model AST-15 (31#) $899.00 511811 Reagent Refill, Model AST-15 (8#) $679.90 Select Model AST-5 Reagent Refill, Model AST-5 Model AST-15 Reagent Refill, Model AST-15 qty: *There is a 20% restocking fee on this product. Model AST-5 MSDS Model AST-15 MSDS The Model AST-5, Model AST-15 and the corresponding Reagent Refills have a 10 to 15 day lead time and will ship separately from other items ordered. Note: This test kit ships in two boxes and a $22.50 Hazardous Materials Charge accompanies the box that houses the reagents. This charge does not show up on the Shopping Cart and will be added to the invoice. How to Order | Shipping Guide | Contact Us