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A Generalized Function of Wheat's Root Length Density Distributions

^a Dep. of Soil and Water Sciences and Key Laboratory of Plant–Soil Interactions, MOE, College of Resources and Environment, China Agricultural University, Beijing 100094, P.R. China
^b State Key Lab. of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China, and Dep. of Renewable Resources, University of Wyoming, Laramie, WY 82071-3354, USA

View larger version (36K): [in a new window]   Fig. 1. Data of normalized root length density of wheat and curves of the generalized function (GF), linear function (LF), and Wu et al.'s function (1999) (WF). The triangles denote the 39 points used by Wu et al. (1999).

View larger version (28K): [in a new window]   Fig. 2. Comparison between experimental data of normalized root length density distributions of wheat and estimated results using the generalized function (GF), linear function (LF), and Wu et al.'s function (1999) (WF).

View larger version (27K): [in a new window]   Fig. 3. Comparison between experimental data of root length density distributions of wheat and estimated results using the generalized function (GF), linear function (LF), and Wu et al.'s function (1999) (WF) for treatments of (a) CW1 in the column experiment and (b) FW1 in the field experiment.

View larger version (38K): [in a new window]   Fig. 4. Comparison of measured soil water content distributions in FW1 soil–wheat system and simulated profiles using the generalized function (GF), linear function (LF), and Wu et al.'s function (1999) (WF) for duration from 3 to 27 Apr. 2002.