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Thesis (M.S.)--University of Nebraska--Lincoln, 1960. Department of Agronomy.


Copyright 1960, the author. Used by permission.


An investigation was undertaken to evaluate several conditions under which volatilization losses may be accelerated, with special emphasis on losses occurring as ammonia gas.

Gaseous losses of nitrogen are known to occur from soils following fertilizer nitrogen application depending on several soil and environmental conditions. The form in which the fertilizer nitrogen is applied has a marked influence on the losses occurring from soils. The greenhouse oats experiment indicated significant differences between urea and ammonium sulfate in nitrogen utilization and residual nitrogen in the soil, urea giving the lower values. Little difference between urea and ammonium nitrate in the second incubation study was observed. The last experiment, however, showed decidedly greater losses of ammonia following urea and Solution 32 applications than when nitrogen was applied as ammonium nitrate. Average losses of ammonia from three soils were 8 and 9.8 per cent of the total nitrogen applied as Solution 32 and urea respectively, as three placement. A smaller percentage loss, 1.2 per cent, was recorded from applications of ammonium nitrate with the same placements.

Advisor: R. A. Olson.