scholarly journals High-Yielding and Heavy Manuring Rice Cultivation in Jiangsu Province, China, in Relation to the Amount of Nitrogen Fertilizer Applied and Nitrogen Fertilizer Efficiency

2012 ◽  
Vol 81 (4) ◽  
pp. 453-455 ◽  
Author(s):  
Akira Miyazaki ◽  
Toshiaki Kokubo ◽  
Jing Ju ◽  
Zujian Zhang ◽  
Buhong Zhao ◽  
...  
Keyword(s):  
Nitrogen Fertilizer ◽  
Jiangsu Province ◽  
Rice Cultivation ◽  
Fertilizer Efficiency

scholarly journals Sustainable Agriculture by Increasing Nitrogen Fertilizer Efficiency Using Low-Resolution Camera Mounted on Unmanned Aerial Vehicles

2019 ◽  
Vol 16 (20) ◽  
pp. 3893 ◽  
Author(s):  
Kim ◽  
Min ◽  
Kim ◽  
Silva ◽  
Hyun ◽  
...  
Keyword(s):  
Chlorophyll Content ◽  
Nitrogen Fertilizer ◽  
Precision Agriculture ◽  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Nitrogen Deficiency ◽  
Underground Water ◽  
Fertilizer Efficiency ◽  
Low Resolution ◽  
Effective Manner

Nitrogen use efficiency in modern agriculture is very low. It means that a lot of synthetic chemicals are wasted rather than utilized by crops. This can cause more problems where the soil surface is thin and rocky like Jeju Island in the Republic of Korea. This is because overly used nitrogen fertilizer can be washed into the underground water and pollute it. Thus, it would be important to monitor the nitrogen deficiency of crops in the field to provide the right amount of nitrogen in a timely manner so that nitrogen waste can be limited. To achieve this, the normalized difference vegetation index (NDVI) was used to monitor chlorophyll content, which is tightly associated with nitrogen content in the buckwheat field. The NDVI was calculated with the data obtained by a low-resolution camera mounted on an unmanned aerial vehicle. The results showed that the NDVI can estimate the chlorophyll content of buckwheat. These simple but clear results imply that precision agriculture could be achieved even with a low-resolution camera in a cost-effective manner to reduce the pollution of underground water.

Results from recent studies on nitrogen fertilizer efficiency in wetland rice

1983 ◽  
Vol 12 (3) ◽  
pp. 125-134 ◽  
Author(s):  
S. K. De Datta ◽  
I. R. P. Fillery ◽  
E. T. Craswell
Keyword(s):  
Nitrogen Fertilizer ◽  
Fertilizer Efficiency ◽  
Wetland Rice ◽  
Grain Production ◽  
Factors Affecting ◽  
Farming Practice ◽  
Mode Of Application

Yields of rice can be substantially increased by the use of nitrogenous fertilizers, but the return to the producer depends very much on the mode of application. This article reviews the factors affecting the uptake of nitrogen by wetland rice, in terms of grain production, and the means by which experimentally achieved results can be translated into everyday farming practice.

Optimization of biochar and nitrogen fertilizer in rice cultivation

2021 ◽  
pp. 1-14
Author(s):  
Seyed Mehdi Seyedghasemi ◽  
Parviz Rezvani Moghaddam ◽  
Masoud Esfahani
Keyword(s):  
Nitrogen Fertilizer ◽  
Rice Cultivation
Sign in / Sign up

Export Citation Format

Share Document