The Response of Flue-Cured Tobacco to Fertilizer Nitrogen as a Function of Nitrate Nitrogen in the Soil Profile2012.04.20. 9:21:00
The response of flue-cured tobacco to fertilizer nitrogen was a function of soil nitrate – N in spring. The economically optimum rate of nitrogen fertilizer application decreased with increasing amounts of soil nitrate – N.
Under the conditions of this experiment the soil nitrate – N to a depth of 60 cm could be considered equivalent in its effect to fertilizer N. The data indicate that it may be possible to predict N fertilizer need of flue-cured tobacco by subtracting the soil nitrate – N measured prior to transplanting from the total mineral N uptake by the crop. This method appears to be a simple tool to avoid excessive rates of N fertilizer application.
Dr. Gondola István
The Response of Flue-Cured Tobacco to Fertilizer Nitrogen as a Function of Nitrate Nitrogen in the Soil Profile