Farid A. Abdullatif, J. Stroehlein
Nov 1, 1990
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Influential Citations
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Journal
Communications in Soil Science and Plant Analysis
Abstract
Abstract Incubation studies were conducted to evaluate the effectiveness of Dwell (5‐ethoxy‐3‐trichloromethy 1–1–2–4‐thiadiazole), as a nitrification inhibitor of urea and ammonium sulfate (AS) in three Arizona surface soils. In the first experiment, 50 g soil samples were treated with urea to provide ? equivalent to 224 kg/ha. Half of these samples were treated with Dwell solution equivalent to 1.27 kg/ha active ingredient. These samples were incubated at 33 ± 2C and the pH was measured at intervals of 0, 1, 2, 3, 4, 6, 8 and 16 days. In the second experiment one set of 25 g soil was treated with 39 ppm ? as urea solution, and another set received an equal amount amount of ? as AS solution. Half of the urea and AS treated soils received 0.55 mL of 9.68 mg active ingredient Dwell solution which is equivalent to 1.27 kg/ha. Moisture was adjusted to 3/4 field capacity in each soil sample. The samples were incubated at a constant 30C temperature for 0, 5, 10, 15, 20 and 25 days. Total inorganic ? (NO2 ‐, NO3...