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  2. NE NEBRASKA • 45.2 million acres of farm and ranch land – 91% of the state’s total land area. • Abundant groundwater resources • Nearly 24,000 miles of rivers and streams 2 • > 8 million irrigated acres • Income from Nebraska’s farms in 2016 was $21.5B

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  7. ! ! 100 10 1,000 mm cm m km km µm m 10,000 clay silt sand soil series soil catena aggregates 4 years micro 8'0&%12 -,78=<,K( landscape aggregates microbial grassland 2 century roots climate !! community Q:%M-*-'+635%163%#60'.%'(7('(*+(%7'-4(#%)(-/%A#%/01*% change log time (years) prairie plant dogs comm. E'0K !! El Niño year ! 0 /-*,('0A#%2-.6# #$(-8 drought belowground components grass fine roots ! bunch months fungi grass fire aboveground components blade -2 !! !! days bacteria !! !! !! grazing pressure extracellular enzymes system hours -4 !! storms -6 minutes 6 -2 -4 2 4 !! log space (meters) !! !! !! !!

  8. As the system progresses to the K-phase… it is primed for collapse. The actual change is triggered by agents of disturbance (Holling 2001). ” “The essential paradox… is that we seek to preserve what must change (Pickett & White 1985). ”

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