Abstract Denitrification is a key process buffering the environmental impacts of agricultural nitrate loads but, at present, remains least understood and poorly quantified sink in nitrogen budgets watershed scale. The present work deals with comprehensive detailed analysis sources sinks Burana–Volano–Navigabile basin, southernmost portion Po River valley (Northern Italy), an intensively cultiva...

Observations at a mountain-top site within the Mexico City basin are used to characterize ozone production and destruction, nitrogen oxide speciation and chemistry, and the radical budget, with an emphasis on a stagnant air mass observed on one afternoon. The observations compare well with the results of recent photochemical models. An ozone production rate of ∼50 ppbv/h was observed in a stagn...

Mobilization of N from leaves of barley (Hordeum vulgare L.) during water stress, and the role of proline as a mobilized species, were examined in plants at the three-leaf stage. The plants responded to water stress by withdrawing about 25% of the total reduced N from the leaf blades via phloem translocation. Most of this N loss was during the first 2 days while translocation of (14)C-photosynt...