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Nitrogen Uptake across Site Specific Management Zones in Irrigated Corn Production Systems

^a Dep. of Soil and Crop Sciences, Colorado State Univ., Fort Collins, CO 80523-1170
^b Dep. of Forestry, Colorado State Univ., Fort Collins, CO 80523-1170

View larger version (15K): [in a new window]   Fig. 1. Semi-variogram for N uptake and grain yield for site-year 1.

View larger version (43K): [in a new window]   Fig. 2. Mean N uptake across low, medium, and high management zones for site-year 1, 2, and 3. Error bars represent standard deviation of the mean. Different letters are significantly different (p < 0.05).

View larger version (51K): [in a new window]   Fig. 3. Mean grain yield across low, medium, and high management zones for site-year 1, 2, and 3. Error bars represent one standard deviation of the mean. Different letters are significantly different (p < 0.05).

View larger version (16K): [in a new window]   Fig. 4. Grain yield response to applied N across site-specific management zones in irrigated corn production systems for site-years 1, 2, and 3.