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- W830635054 abstract "Effects of various fertilization histories on cotton yield were investigated for the fourth consecutive year in the same field at the Maricopa Agricultural Center. Treatments included: 1) no fertilizers added for the past 4 seasons, 2) aggressive nitrogen fertilization in the 1988 season, no fertilization for the previous 3 seasons, 3) standard nitrogen fertilization in 1988 similar treatment for the previous 3 seasons, 4) aggressive nitrogen fertilization in 198$ same history as treatment #3 for previous 3 seasons, and 5) a commercial alternative fertilization program (BioHumaNetics, Inc.). Yields in 1988 were significantly different with treatment 2 having the highest yield followed by treatments 3 and 4, followed by treatment 5; treatment 1 had the lowest yield. INTRODUCTION Upland cotton was grown in the same field for 4 consecutive seasons. Various fertilization strategies (Table 1) were employed in order to assess the short -term effects of 5 regimes on yield each season, and to investigate the longer -term effects of continuous cotton cultivation on nutrient availability. Table 1. Treatment schedule. Tin( 1 Control: no fertilizers added for the past 4 years Tmt 2No fertilizers added for previous 3 seasons, aggressive nitrogen fertilization in 1988, and Trr 4Preplant and sidedress nitrogen treatment for the previous 3 seasons, aggressive nitrogen fertilization in 1988: 3/16 46% urea at 225 lbs /A (104 lbs N /A), broadcast 6/2421% ammonium sulfate at 317 lbs/A (67 lbs N /A), sidedress 7/15UAN -32 at 30 lbs N /A), broadcast 8/11UAN -32 at 30 lbs N /A, water -run (total N application was 231 lbs /A) Tmt 3Standard (preplant and sidedress) nitrogen fertilization for the last 4 years. 1988 program: 3/16 46% urea at 225 lbs/A (104 lbs N /A), broadcast 6/2421% ammonium sulfate at 317 lbs /A (67 lbs N /A),sidedress (total N application was 171 lbs /A) Tmt 5BioHumaNetics (BHN) program for the past 4 years. 1988 program: 1/26Soil application of PEK and Lase 4/20Foliar application of 13 -7 -5 (with Co, Si, S, and Cu in trace amounts) at 1.96 gal /A (2.4 lbs N /A) 5/6 Soil application of 30 -0 -0 Huma -N concentrate (urea and ammonium nitrate) at 9 gal /A (25.4 lbs N /A) 5/27Foliar application of a blend containing 6 -10 -5 and trace amounts of Fe, Zn, Mn, S at 2 gal /A (1.1 lbs N /A) 6/24Soil application of 10 -20 -0 at 10 gal /A (9.4 lbs N /A) 7/15Soil application of 30 -0 -0 at 10 gal /A (28.2 lbs N /A)" @default.
- W830635054 created "2016-06-24" @default.
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- W830635054 date "1989-03-01" @default.
- W830635054 modified "2023-09-28" @default.
- W830635054 title "Response of Cotton to Various Fertilization Histories" @default.
- W830635054 hasPublicationYear "1989" @default.
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