Can We Turn Sewer Sludge into Something Valuable?
Sewage sludge doesn’t have much value as fertilizer. Could extracting the valuable elements put it to better use?
Nutrient cycle
What We Can Do About Nitrogen Emissions and Air Pollution
Nitrogen emissions from agriculture can exacerbate particulate pollution, endangering human health. There has been a lot of progress in addressing that, but much still needs to be done.
3. There Is Not Enough Manure (or Compost) to Sustain Agriculture
Agronomist Andrew McGuire explains why there is not enough manure or compost available – and can never be enough – to replenish soil fertility at a systems level. Studies that show improved outcomes on single farms are not measuring improvement at a systems level.
1. How Much Nitrogen and Phosphorus Can Manure Supply?
Can we produce enough manure to serve as a major source of soil nutrients? Agronomist Andrew McGuire shows the limitations due to entropy make it impossible for manure to make up more than a portion of nutrient replenishment.
Nutrient Management on Steroids
NutrientStar, which assesses fertilizer management products and tools using field trials and in-depth scientific reviews, was a game changer for farmers. Prior to the launch of the program last year, there was no expert review program to help farmers determine what tools would work as advertised.
The only downside of the program was its limited utility. Farmers had no easy way to extrapolate results from the relatively few number of field trials performed thus far to their own locations. Now, a new geospatial feature called the Technology Extrapolation Domain (TED) framework will make NutrientStar accessible to tens of thousands of additional farmers across the Corn Belt.
I like to think of it as NutrientStar on steroids.
Facing up to Phosphorus
Farmers around the world have come to depend on manufactured inorganic fertilizers containing key plant nutrients phosphorus, nitrogen and potassium to enhance soil fertility, especially in the otherwise poor soils of most tropical settings. But while all three are relatively abundant in nature, commercially viable sources of phosphorus to make these fertilizers could be exhausted just a few decades from now. That prospect, which remains a source of heated debate, has spurred a drive to recover the significant quantities of this element that disappear in the waste streams of cities and farms.
Communication Intercept Reveals 21st Century Cities Were Alien Food Project
Communication Intercept Reveals 21st Century Cities Were Alien Food Project. Intercepted communication of Earth Concentration Project leader, 2016, between Outpost Dq12 and exoplanet HD 40307g. […]