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Nitrogen and Dry Matter Distribution by Culm and Leaf Position at Two Stages of Vegetative Growth in Winter Wheat

^a USDA-ARS, Soil and Water Conservation Res. Unit, Univ. of Nebraska, Lincoln, NE 68583
^b USDA-ARS, Great Plains Systems Res. Unit, P.O. Box E, Fort Collins, CO 80522
^c School of Natural Resource Sci., Univ. of Nebraska, Lincoln, NE 68583 (formerly, USDA-ARS, Soil and Water Conservation Res. Unit, Univ. of Nebraska, Lincoln, NE 68583)

View larger version (35K): [in a new window]   Fig. 1. Blade, sheath, and internode N concentrations, N mass, and tissue dry weights on four sampling dates with standard error bars. The MC, T1, T2, and T11 culms are pooled to represent the whole canopy.

View larger version (34K): [in a new window]   Fig. 2. Nitrogen concentration, N mass, and dry matter by tissue (two-season means over all four culms studied) with standard error bars. The MC, T1, T2, and T11 culms are pooled to represent the whole canopy.

View larger version (45K): [in a new window]   Fig. 3. Nitrogen concentration, N mass, and dry matter by culm in December and May (two-season means) with standard error bars. Data from the December sampling for tiller T11 not presented due to small sample size.

View larger version (41K): [in a new window]   Fig. 4. Nitrogen concentration, N mass, and dry matter by phytomer (two-season means over all tissues and culms) with standard error bars.