This paper studied the fertilizer rate (FR), use efficiency (FUE) and overuse (FOR) of rice, corn wheat in China from 1998 to 2018 briefly analysed reasons why farmers were willing apply more fertilizers. (1) The FR grain reached 373.7 kg/ha 2018, an increase 26.8% compared that 1998. In for was highest, at 411.2 kg/ha, values 338.3 rice 371.7 wheat. (2) recent years, FUE has obviously improved...

Appropriate fertilization practice is crucial to achieve maximum wheat grain yield with minimum nitrogen (N) loss. A field 15N micro-plot experiment was conducted to determine the effects of application methods [split application (SA) and band application (BA)] and N rates (60, 150 and 240 kg ha-1) on the wheat grain yield, urea-15N fate and N efficiency in Jiangyan County, China. At high N rat...

one of the important aspects of the medicinal plants production is using less chemical inputs. it could be effective for increasing of production and environmental purposes. in order to investigate the effects of application time of integrated chemical fertilizer with cattle manure on growth, yield and yield components of black cumin (nigella sativa l.), an experiment was conducted based on a r...

In a fertilizer plant, the steam boiler is the most important component. In order to keep the plant operating in the effective mode, the boiler efficiency must be observed continuously by several operators. When the trend of the boiler efficiency is going down, they may adjust the controlling parameters of the boiler to increase its efficiency. Since manual operation usually leads to unexpected...