Chapters for The Book of Threes



Soil management PDF Print E-mail
Nature

Soil-Plant Nutrient Cycle - Source: U.S. Geological Survey.

Essential Nutrients

There are 15 essential elements that plants must have in order to grow properly.

The primary nutrients are nitrogen, phosphorus and potassium.

18 Essential Nutrients

  • Nutrient elements obtained from atmosphere through photosynthesis
    • Hydrogen
    • Carbon
    • Oxygen

 

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Arnold, Matthew (1822-88)

Arnold, Matthew
Arnold, Matthew
 

"One's age should be tranquil, as childhood should be playful. - Hard work at either extremity of life seems out of place. - At mid-day the sun may burn, and men labor under it; but in the morning and evening should be alike calm and cheerful."

3's flash

If you have a broadband connection and are using the web browser Internet Explorer, you can view a sabbatical presentation by the author of The Book of Threes. He suggests threes exist simultaneously as simplification, completion and memory. Read more at http://sab.threes.com.

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