A biological-chemical test system to investigate the influence of sulfonylurea herbicides such as metsulfuron-methyl on nitrogen metabolism in soybean - A. J. Keutgen; N. Keutgen; M. Jia; S. Matsuhashi; C. Mizuniwa; T. Ito; T. Fujimura; T. Sekine; S. Hashimoto (European Journal of Horticultural Science)