Agricultural Degradation: Difference between revisions
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=====Do we only have 60 harvests left?===== | |||
[https://ourworldindata.org/soil-lifespans?fbclid=IwAR02haa0AFBP8BOYNz6JND2Uv7qWS_MQB7-OOcORvd19jW4hZ7qDCoLsujU by Hannah Ritchie | |||
January 14, 2021 Our World in Data] | |||
The stark claim that the world has only 100; 60 or even 30 years of harvests left often hits the headlines. Although they continue to be repeated, there is no scientific basis to them. While the claims are overblown, soil erosion is an important problem. Erosion rates from across the world span five orders of magnitude. Some are eroding quickly: 16% of soils are estimated to have a lifespan of less than 100 years. Others are eroding slowly: half have a lifespan greater than 1000 years; and one-third have over 5000 years. To protect our soils we must adopt better agricultural practices – such as cover cropping, minimal or no tillage, and contour cultivation. This way we can extend the lifespan of the soils that we all depend on. | |||
=====Newly identified jet-stream pattern could imperil global food supplies, says study===== | =====Newly identified jet-stream pattern could imperil global food supplies, says study===== | ||
<embed>https://phys.org/news/2019-12-large-atmospheric-jet-stream-global.html</embed> | <embed>https://phys.org/news/2019-12-large-atmospheric-jet-stream-global.html</embed> | ||
