Libraries at University of Nebraska-Lincoln
Document Type
Thesis
Date of this Version
6-1959
Citation
Thesis (M.S.)--University of Nebraska--Lincoln, 1959. Department of Agronomy.
Abstract
Nitrogen is more often deficient in Nebraska soils than any other nutrient element. Past cropping history has not been entirely satisfactory as a technique for predicting a need for nitrogen fertilizer. However, some Nebraska and Iowa workers have shown that nitrification rate has been a suitable technique for predicting a need for nitrogen fertilizer. The purpose of this investigation was to refine and further evaluate nitrification rate and other laboratory methods for measuring nitrogen status of Nebraska soils.
The investigation has three primary objectives: (1) to refine the techniques used by Woltemath in determining nitrification rate, (2) to study the possible influence of ammonium-nitrogen absorbed by the exchange complex of the soil on the nitrification rate, and (3) to evaluate nitrification rate and other methods for predicting crop response to nitrogen fertilizer.
Advisor: R. A. Olson.
Comments
Copyright 1959, the author. Used by permission.