Economic Optimum Nitrogen Fertilizer Rate and Residual Soil Nitrate as Influenced by Soil Texture in Corn Production

2018 ◽  
Vol 110 (6) ◽  
pp. 2233-2242 ◽  
Author(s):  
Khaled D. Alotaibi ◽  
Athyna N. Cambouris ◽  
Mervin St. Luce ◽  
Noura Ziadi ◽  
Nicolas Tremblay
Keyword(s):  
Soil Texture ◽  
Nitrogen Fertilizer ◽  
Residual Soil ◽  
Soil Nitrate ◽  
Fertilizer Rate ◽  
Corn Production ◽  
Nitrogen Fertilizer Rate

The response of flue-cured tobacco cultivar K326 to nitrogen fertilizer rate in China

2020 ◽  
Vol 158 (5) ◽  
pp. 371-382
Author(s):  
Yanjie Chen ◽  
Ke Ren ◽  
Xian He ◽  
Yi Chen ◽  
Binbin Hu ◽  
...  
Keyword(s):  
Nitrogen Fertilizer ◽  
Dry Weight ◽  
Fertilizer Application ◽  
Economic Benefits ◽  
Quadratic Model ◽  
Residual Soil ◽  
Fertilizer Rate ◽  
The Sustainable Development ◽  
Tobacco Production ◽  
Nitrogen Fertilizer Rate

AbstractNitrogen is an important element for the growth of flue-cured tobacco and is closely related to its yield and quality. In order to pursue higher economic benefits, excessive fertilizer is generally applied in flue-cured tobacco production, which is unfavourable for the sustainable development of flue-cured tobacco production and for the environment. In 2016 and 2017, experiments using different nitrogen fertilizer application rates in flue-cure tobacco were conducted in Yunnan province, and the changes in agronomic, economic and chemical indices as well as in residual soil nitrogen were compared. Linear and quadratic models were used to compare the response of tobacco to nitrogen fertilizer. With increasing nitrogen fertilizer rate, the proportions of superior to medium tobacco and the average price of flue-cured tobacco leaves initially increased and then decreased, while fresh weight, dry weight and the proportion of inferior tobacco showed the opposite trend. Total sugar and reducing sugar contents decreased with increasing nitrogen fertilizer rates, while total nitrogen and nicotine contents increased. Sensory evaluation scores had the highest value when 90 kg N/ha and 120 kg N/ha were applied. Soil nitrate contents increased as nitrogen fertilizer rate increased. The quadratic model was suitable for the response of cultivar K326 to nitrogen and 90 kg N/ha could meet the needs of cultivar K326.

scholarly journals Effects of Manure History and Nitrogen Fertilizer Rate on Sugar Beet Production in the Northwest US

cftm ◽  
2018 ◽  
Vol 4 (1) ◽  
pp. 1-9
Author(s):  
David D. Tarkalson ◽  
David L. Bjorneberg ◽  
Rick D. Lentz
Keyword(s):  
Sugar Beet ◽  
Nitrogen Fertilizer ◽  
Fertilizer Rate ◽  
Nitrogen Fertilizer Rate

Optimization of nitrogen fertilizer rate under integrated rice management in a hilly area of Southwest China

Pedosphere ◽  
2020 ◽  
Vol 30 (6) ◽  
pp. 759-768
Author(s):  
Yujiao DONG ◽  
Jiang YUAN ◽  
Guangbin ZHANG ◽  
Jing MA ◽  
Padilla HILARIO ◽  
...  
Keyword(s):  
Nitrogen Fertilizer ◽  
Southwest China ◽  
Fertilizer Rate ◽  
Hilly Area ◽  
Nitrogen Fertilizer Rate
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