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Bermudagrass Fertilized with Slow-Release Nitrogen Sources. I. Nitrogen Uptake and Potential Leaching Losses

Héctor Mario Quiroga-Garzaa, Geno A. Picchionib and Marta D. Remmengac

a Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP), Apartado Postal 247, Torreón, Coahuila 27000, México
b Dep. of Agronomy and Horticulture, New Mexico State Univ., Las Cruces, NM 88003
c Dep. of Economics and International Business, New Mexico State Univ., Las Cruces, NM 88003



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  		Fig. 1. Clipping N concentration measured at each 20-d period for `Tifgreen' bermudagrass under three N sources (Hydroform, HYD; sulfur-coated urea, SCU; and urea, URE), two N rates (100 and 200 kg ha-1), and two fertilization frequencies (every 20 and 40 d). Arrows represent time of N application. Each point represents the average of three observations. Vertical bars represent LSD05 for (a) treatments across periods and (b) treatments at the same or different period for both frequencies in each experiment

 


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  		Fig. 2. Clipping N yield measured at each 20-d period for `Tifgreen' bermudagrass under three N sources (Hydroform, HYD; sulfur-coated urea, SCU; and urea, URE), two N rates (100 and 200 kg ha-1), and two fertilization frequencies (every 20 and 40 d). Arrows represent time of N application. Each point represents the average of three observations. Vertical bars represent LSD05 for (a) treatments across periods and (b) treatments at the same or different period for both frequencies in each experiment

 


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  		Fig. 3. Leaching NO3–N concentration measured at each 20-d period for `Tifgreen' bermudagrass under three N sources (Hydroform, HYD; sulfur-coated urea, SCU; and urea, URE), two N rates (100 and 200 kg ha-1), and two fertilization frequencies (every 20 and 40 d). Arrows represent time of N application. Each point represents the average of three observations. Vertical bars represent LSD05 for (a) treatments across periods and (b) treatments at the same or different period for both frequencies in each experiment

 




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The SCI Journals Agronomy Journal Crop Science
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