Long-term winter cover cropping effects on corn ( Zea mays L.) production and soil nitrogen availability

2000 ◽  
Vol 31 (6) ◽  
pp. 470-477 ◽  
Author(s):  
S. Kuo ◽  
E. J. Jellum
Keyword(s):  
Zea Mays ◽  
Soil Nitrogen ◽  
Nitrogen Availability ◽  
Zea Mays L ◽  
Soil Nitrogen Availability ◽  
Cover Cropping ◽  
Winter Cover

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

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.

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