Simulation of leaf area of soybean (Glycine max L. Merrill) by growth models under various weed types’ competition - Bamyan University

Simulation of leaf area of soybean (Glycine max L. Merrill) by growth models under various weed types’ competition

Author: Pohanmal HOSSEIN MOHAMMADI

Email: Mohammadi8888@gmail.com

 

ABSTRACT

An investigation on “Weed Management and Crop Growth Modeling in Soybean” was conducted on red sandy loam soil at the Main Research Station, University of Agricultural Sciences, Hebbal, Bangalore during Rabi 2010 (September to December). The weed management practices included in the study were i) Pendimethalin 30 EC 1.0 kg a.i./ha – 3 DAS, ii) Imazethapyr 10 SL 100 g a.i./ha – 20 DAS, iii) Quizalofop-p-ethyl 5 EC 50 g a.i./ha – 20 DAS, iv) Chlorimuron ethyl 25 WP 6 g a.i./ha – 20 DAS, v) Hand weeding (20 & 40 DAS) and vi) Unweeded control. The experiment was laid out as randomized complete block design with four replications. Growth models – Richards, Logistic, Cubic polynomial and Quadratic polynomial simulated the course of dry matter production/plant by >97per cent under all weed management practices, indicating that weed competition did not alter the pattern of crop growth, but affected the total production substantially.

 

Key Words: Soybean, Growth models, Weed type’s competition, Simulation of leaf area

 

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