"Nitrous oxide (N2 O) is a major greenhouse gas and cultivated soils are the dominant anthropogenic source. In this dissertation, I examine some aspects of N2 O where knowledge is lacking: diffusion of N2 O through the soil profile; production of N2 O in soils below the A or Ap horizon in relation to irrigation, tillage, and fertilization; and patterns of N2 O response to nitrogen (N) fertilizer rate... " -- Abstract.
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