BEULAH, N.D. (AP) - Even as western North Dakota watches nervously while its once-booming oil industry wallows in the doldrums, a massive construction project centered around coal is quietly hitting ...

Journal of Experimental Botany, Vol. 63, No. 14 (2012), pp. 5245-5258 (14 pages) Abstract N-fertilizer use efficiencies are affected by their chemical composition and suffer from potential N-losses by ...

Nitrogen-15 labelled urea, aqueous NH₃ and (NH₄)₂SO₄ were applied to soils contained in pots. The fertilizers were injected in 5 cm³ of solution, 3.5 cm below the soil surface, to simulate a ...