“…However, oilseed rape (Brassica napus L.), an important oil crop, is predominantly grown in Mo-deficient soils (Yin et al, 2009). Moreover, oilseed rape requires plenty of nitrogen (N) fertilizer for growth and yield (Behrens et al, 2002;Barłóg and Grzebisz, 2004a;2004b;Rathke et al, 2006;Leiva-Candia et al, 2013) and Mo deficiency often decreases the activity of nitrate reductase which leads to N deficiency in plants (Chatterjee and Nautiyal, 2001;Ide et al, 2011), poor seedling growth and lower grain yield (Yang et al, 2009;Liu et al, 2010). Furthermore, winter wheat subjected to higher rate of N-fertilization is prone to Mo deficiency (Wang et al, 1999) while supplying NH 4 NO 3 to plants stimulates the remobilization of Mo in black gram (Jongruaysup et al, 1997).…”