the new series of qi started in late 2018.
the new series of qi started in late 2018.
when does the new series of qi start?
late 2018
Na
Na
rills are narrow and shallow channels which are eroded into unprotected soil by hillslope runoff. since soil is regularly left bare during agricultural operations, rills may form on farmland during these vulnerable periods. rills may also form when bare soil is left exposed following deforestation, or during construction activities. 









































rills are fairly easily visible when first incised, so they are often the first indication of an ongoing erosion problem. unless soil conservation measures are put into place, rills on regularly eroding areas may eventually develop into larger erosional features such as gullies or even (in semi-arid regions) into badlands.
rill