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Uptake of Point Source Depleted ¹⁵N Fertilizer by Neighboring Corn Plants

^a Monsanto Company, Monmouth Agronomy Center, 1677 80th Street, Monmouth, IL 61462
^b Dep. of Agronomy and Horticulture, Univ. of Nebraska-Lincoln, NE 68583-0724
^c USDA-ARS, Lincoln, NE 68583-0934

View larger version (10K): [in this window] [in a new window]   Fig. 1. Plot layout for N fertilizer injection beneath corn plants. Numbers indicate plant position in the row and grouping for lab analysis of vegetative components relative to the target plant (#0).

View larger version (26K): [in this window] [in a new window]   Fig. 2. Depleted 15N uptake at V12 for each plant component at each position relative to the depleted 15N source applied at position #0. Uppercase letters indicate difference (P < 0.05) for vegetative components across plant position. Lowercase letters indicate differences (P < 0.05) between vegetative components within each plant position.

View larger version (20K): [in this window] [in a new window]   Fig. 3. Depleted 15N uptake at R1 for each vegetative component within each plant position. Uppercase letters indicate difference (P < 0.05) for vegetative components across plant position. Lowercase letters indicate differences (P < 0.05) between vegetative components within each plant position.

View larger version (35K): [in this window] [in a new window]   Fig. 4. Distribution of depleted 15N uptake by corn at two growth stages and three mirrored plant positions relative to a single soil injection point of depleted 15N fertilizer at position #0 (18 cm between plants). Data compiled from Tables 1 and 2 to calculate mirrored effects.