Plant Foods Must Be Soluble 
1. Nitrogen 11. Urea 21. Silver 
2. Phosphorus 12. Cobalt 22. Nickel 
3. Potassium 13. Manganese 23. Lead 
4, Calcium 14. Iodine 24, Aluminum 
5. Magnesium 15. Zine 25. Selenium 
6. Sulphur 16. Chlorine 26. Copper 
7. Sodium 17. Arsenic Bie in 
8. Iron 18. Silica 28. Barium 
9. Boron 19. Oxygen 29. Strontium 
10. Carbon 20. Hydrogen 30. Molybdenum 
Different kinds of plants require plant foods that 
are different. For example, the bean family; some 
varieties require much lime and other varieties grow 
well with little lime. Some varieties like water in 
large quantities, other varieties like a moderate 
amount. 
Earthworms will kill blueberries but seem to 
benefit most plants. 
Mushrooms can grow without any light, most 
plants cannot do so. 
I have heard of different kinds of strawberries 
growing from Mexico to within the Arctic Circle. 
