| Popis: |
The results of three 1983 tests are given in this report. Tests 1 and 2 were performed at the South Central Res. Stn. Chickasha, Okla. Test 3 was done at the irrigation Res. Stn., Altus, Okla. The soil at Chickasha is a Tuttle silt clay loam and that at Altus is a Tillman holister clay loam. Tests 1 and 2 were planned 5 June at the rate of 18 lb/acre and Test 3 was planted 19 May at 22 lb/acre. Plot sizes varied among tests with Tests 1, 2, and 3 consisting of 8 row by 46 m, 8 row by 58 m, and 8 row by 76 m, respectively. A randomized complete block design with three replications was used for each test. Spray applications were made with a John Deere Hi-Cycle 6000 at Chickasha and a John Deere Hi-Cycle 600 at Altus. The John Deere spraying unit was replaced with a Marco system equipped with a roller pump powered by a 3 hp Briggs and Stratton gasoline engine. Spray applications were made at a speed of 4.5 mph, at 40 lb/in2 , with a total of 5 gal/acre through one no. 8 hollow cone nozzle per row. Applications were made 4, 10, 18, 25, and 31 Aug. for Test 1; 3, 10, 18, 25, and 31 Aug. for test 2; and 11, 18, and 24 Aug. for Test 3. Plots were irrigated with approximately 1 inch of water per irrigation. Irrigation dates were as follows: Test 1, 22 and 29 July, 13 Aug., and 2 Sept.; Test 2, 25 Jul., 1 and 15 Aug., and 3 Sept.; Test 3, 14 and 26 July, 8, 16, and 26 Aug., 2 and 9 Sept. |
