The four spheres of Earth’s environment. Biosphere interacting with abiotic factors. Fig 3-1. Periodic Chart of Elements John Wiley — Resource Manager CD-ROM. N-CHOPS. Law of the Minimum/Law of limiting factors - Liebig's Law. Justus von Liebig "father of the fertilizer industry”
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Biosphere interacting with abiotic factors
Periodic Chart of ElementsJohn Wiley — Resource Manager CD-ROM
Justus von Liebig
"father of the fertilizer industry”
law of the minimum
If one crop nutrient is missing or deficient, plant growth will be poor, even if the other elements are abundant.
like a barrel with unequal boards
One nutrient becomes the limiting factor
Light energy chemical energy
Many calories of light energy to produce a few calories of carbohydrate
GPP= NPP + energy used by the plants
An example of mutualism
Nitrogen and Phosphorus are 2 of the main components in fertilizer for agriculture and your garden.
How does the source of these materials for human use differ?
How does the difference in source affect their potential availability?
What happens to excess Nitrogen and Phosphorus that is put on farm fields? What happens to the N & P not used by crops?
There is much talk in the news about carbon emissions and high CO2 causing global warming.
Plants take up CO2 during photosynthesis.
Why don’t plant just take up all the extra CO2 and get it out of the atmosphere?
Hydrologic cycle high CO
What limits production? high CO
Low N & P
Fig 3-23 high CO. Flow of nutrients in human society
The Human System:
How can we make it sustainable?