scholarly journals Determining fertilizer quantities required for wheat

2003 ◽  
Vol 48 (1) ◽  
pp. 39-58 ◽  
Author(s):  
Mirjana Kresovic ◽  
V. Licina
Keyword(s):  
Soil Nitrogen ◽  
Nitrogen Fertilizer ◽  
Reliable Method ◽  
Nitrogen Availability ◽  
Calculation Model ◽  
Nitrogen Utilization ◽  
Brown Forest Soil ◽  
Soil Nitrogen Availability ◽  
Long Term Experiments

In this experiment we used brown forest soil that has been used in long-term experiments, for 30 years, with increasing doses of introduced nitrogen fertilizer in variants. In order to determine the quantities of nitrogen fertilizer required for wheat, a calculation model has been applied. This calculation requires not only a reliable method for determining soil nitrogen availability (both the total and easily hydrolyzed nitrogen method were used), but also a reliable method for determining the coefficient of nitrogen utilization from soil as well as data on the coefficient of nitrogen utilization from fertilizer (Nani) for the added quantities of nitrogen fertilizer.

scholarly journals Estimation of soil nitrogen availability

2003 ◽  
Vol 48 (1) ◽  
pp. 21-38
Author(s):  
Mirjana Kresovic ◽  
V. Licina
Keyword(s):  
Crop Rotation ◽  
Soil Nitrogen ◽  
Nitrogen Availability ◽  
Nitrogen Fertilizers ◽  
Soil Parameters ◽  
Controlled Environment ◽  
Brown Forest Soil ◽  
Soil Nitrogen Availability ◽  
Long Term Experiments

Our research has been made on brown forest soil that is used in long-term experiments. The soil we used had a certain crop rotation (wheat-corn) and had been fertilized according to a certain system for 30 years. In the experiment, quantities of nitrogen fertilizers were gradually increased after which samples were taken from O to 30 cm depths in order to establish plant and soil parameters for assessing the applied methods. Two experiments were made: one in the field and one in a controlled environment. On grounds of the established correlation interdependence between the methods applied (the total and easily hydrolyzed nitrogen) and the plant and soil parameters, in both field and pots, one can conclude that the methods of total and easily hydrolyzed nitrogen, from the standpoint of nitrogen availability in soil, are reliable. In the method of total nitrogen assessment, one should rely on the parameters regarding plants and soil in the field. In the method of easily hydrolyzed nitrogen, the parameters regarding plants and soil, in both the field and pots, are the same.

Long-Term Nitrogen Storage and Soil Nitrogen Availability in Post-Fire Lodgepole Pine Ecosystems

Ecosystems ◽  
2009 ◽  
Vol 12 (5) ◽  
pp. 792-806 ◽  
Author(s):  
Erica A. H. Smithwick ◽  
Daniel M. Kashian ◽  
Michael G. Ryan ◽  
Monica G. Turner
Keyword(s):  
Soil Nitrogen ◽  
Nitrogen Availability ◽  
Lodgepole Pine ◽  
Nitrogen Storage ◽  
Soil Nitrogen Availability

Rate and timing of nitrogen fertilizer application on potato ‘FL1867’. Part I: Plant nitrogen uptake and soil nitrogen availability

2015 ◽  
Vol 183 ◽  
pp. 246-256 ◽  
Author(s):  
Lincoln Zotarelli ◽  
Libby R. Rens ◽  
Daniel J. Cantliffe ◽  
Peter J. Stoffella ◽  
Douglas Gergela ◽  
...  
Keyword(s):  
Soil Nitrogen ◽  
Nitrogen Uptake ◽  
Nitrogen Fertilizer ◽  
Nitrogen Availability ◽  
Fertilizer Application ◽  
Soil Nitrogen Availability ◽  
Plant Nitrogen ◽  
Plant Nitrogen Uptake

scholarly journals Aerobic and anaerobic incubation: Biological indexes of soil nitrogen availability

2005 ◽  
pp. 45-57
Author(s):  
Mirjana Kresovic ◽  
Svetlana Antic-Mladenovic ◽  
Vlado Licina
Keyword(s):  
Forest Soil ◽  
Soil Nitrogen ◽  
Nitrogen Availability ◽  
Nitrogen Fertilizers ◽  
Soil Parameters ◽  
Anaerobic Incubation ◽  
Brown Forest Soil ◽  
Biological Index ◽  
Soil Nitrogen Availability ◽  
Aerobic And Anaerobic

Our researches have been made on brown forest soil that had been used in long-term experiments set up according to specified fertilization system for over 30 years. We have chosen those experiment variants in which quantities of nitrogen fertilizers were gradually increased. The soil samples taken from 0 cm to 30 cm depth were used to determine biological indexes of nitrogen availability (aerobic and anaerobic incubation). The same samples were also used for pot experiments with oat. Plant and soil parameters obtained in controlled conditions were used for determination of biological indexes reliability in measuring the soil nitrogen availability. On the grounds of correlation analysis, it can be concluded that biological index of nitrogen availability achieved by the anaerobic incubation (without substraction of the initial content of available nitrogen) of the investigated brown forest soil is the reliable indicator of soil nitrogen availability. That is not the case with the aerobic incubation in which reliability has not been established.

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