W. H. Patrick

TL;DR: Oxygen transport through the air spaces of the stem and roots of aquatic macrophytes into the root zone supports nitrification of NH,+, with the NOJ- formed diffusing into the adjacent anaerobic zone where it undergoes #denitrification.

TL;DR: In this article, a laboratory incubation experiment was conducted to study the critical initiation soil redox potential (Eh), the optimum soil pH, and the interaction of Eh and pH on methane production.

TL;DR: Arsenic absorption by rice (Oryza sativa, L.) in relation to the chemical form and concentration of arsenic added in nutrient solution was examined in this article, where a 4 × 3 × 2 factorial experiment was conducted with treatments consisting of four arsenic chemical forms [arsenite, As(III); arsenate, As (V); monomethyl arsenic acid, MMAA; and dimethyl arsenic acid (DMAA), three arsenic concentrations [0.05, 0.2, and 0.8 mg As L-1], and two cultivars [

TL;DR: Arsenic absorption by rice (Oryza sativa, L.) in relation to As chemical form present in soil solution was examined in this paper, where rice plants were grown in soil suspensions equilibrated under selected conditions of redox and pH, affecting arsenic solubility and speciation.

TL;DR: In this paper, the authors studied the sequence of reduction of three electron acceptors under controlled redox potential conditions, and showed that the oxidation and reduction of these three electronacceptors were sequential, with no overlap in the oxidation or reduction of the NO3 and Mn systems and little overlap in oxidation and reducing of the Mn and Fe compounds.