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Sugarbeet Yield and Nitrogen Use Efficiency with Preplant Broadcast, Banded, or Point-Injected Nitrogen Application

^a USDA-ARS, Northern Plains Agricultural Research Lab., 1500 N. Central Ave., Sidney, MT 59270
^b Agrium Inc., Suite 1700, 4582 S. Ulster St., Denver, CO 80237
^c Univ. of Wyoming, Sust. Agric. Res. and Ext. Center, 2753 State Hwy. 157, Lingle, WY 82223
^d Dep. of Plant and Animal Sciences, Brigham Young Univ., Provo, UT 84602
^e Wilbur-Ellis Company, 150 Burlington St., Pasco, WA 99301

View larger version (26K): [in this window] [in a new window]   Fig. 1. Root yield and root sucrose content of sugarbeet grown at Powell, WY, with different amounts of N fertilizer and three preplant application methods [broadcast and incorporated (BI), point-injected (PI), or knife-banded (KB)]. Root yield data points (open symbols and solid lines) are read on the left axis while root sucrose content data points (solid symbols and dashed lines) are read on the right axis.

View larger version (25K): [in this window] [in a new window]   Fig. 2. Root yield and root sucrose content of sugarbeet grown at Torrington, WY, with different amounts of N fertilizer and two preplant application methods [broadcast and incorporated (BI), or point-injected (PI). Root yield data points (open symbols and solid lines) are read on the left axis while root sucrose content data points (solid symbols and dashed lines) are read on the right axis.

View larger version (36K): [in this window] [in a new window]   Fig. 3. Sugarbeet sucrose yield response to N fertilizer application rate and method [broadcast and incorporated (BI), point-injected (PI), or knife-banded (KB)] at (a–d) Powell and (e, f) Torrington, WY. Results from Torrington in 1992 are not included because the response to applied N was not significant for that site-year. Functions and statistics describing each response curve are presented in Table 5.