| 期刊全稱 | Biological Nitrogen Fixation for Sustainable Agriculture | | 期刊簡稱 | Extended versions of | | 影響因子2023 | J. K. Ladha,T. George,B. B. Bohlool | | 視頻video | http://file.papertrans.cn/188/187424/187424.mp4 | | 學(xué)科分類 | Developments in Plant and Soil Sciences | | 圖書封面 |  | | 影響因子 | Chemical fertilizers have had a significant impact on foodproduction in the recent past, and are today an indispensable part ofmodern agriculture. On the other hand, the oil crisis of the 1970s andthe current Middle East problems are constant reminders of thevulnerability of our fossil fuel dependent agriculture. There are vastareas of the developing world where N fertilizers are neitheravailable nor affordable and, in most of these countries, balance ofpayment problems have resulted in the removal of N fertilizersubsidies. The external costs of environmental degradation and humanhealth far exceed economic concerns. Input efficiency of N fertilizeris one of the lowest and, in turn, contributes substantially toenvironmental pollution. Nitrate in ground and surface waters and thethreat to the stability of the ozone layer from gaseous oxides ofnitrogen are major health and environmental concerns. The removal oflarge quantities of crop produce from the land also depletes soil ofits native N reserves. Another concern is the decline in crop yieldsunder continuous use of N fertilizers. .These economic, environmental and production considerations dictatethat biological alternatives which c | | Pindex | Book 1992 |
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