William R. Horwath

TL;DR: In this article, a simple and convenient HCl-fumigation method to remove inorganic carbonates from soil was proposed, where soil samples are weighed in Ag-foil capsules, arranged on a microtiter plate, wetted with water to approximately field capacity, and placed in a desiccator containing a beaker with concentrated 12 M HCl.

TL;DR: In this paper, a spectrophotometric procedure for determination of nitrate in water, soil extracts, and a variety of other sample types is described using one reagent solution which is easily prepared and stored.

TL;DR: These findings challenge established thought attributing N2O emissions from soils with high water content to HD due to presumably low O2 availability and imply that management practices that increase soil aeration, e.g., reducing compaction and enhancing soil structure, together with careful selection of fertilizer sources and/or nitrification inhibitors, could decrease N 2O production in agricultural soils.

TL;DR: In this paper, the authors review the current knowledge about the regulation of the enzyme systems involved in the acquisition of N and propose a conceptual model on the factors affecting the relative importance of organic and mineral N uptake.

TL;DR: In this article, the authors studied the effects of organic and low-input farming practices on soil fertility in the Sacramento Valley. But they did not find that animal manures did not increase salinity.