It's a fertilizing element for ragweed
[DOC] [TLE] The Function of Soil Minerals and Trace Elements in Soil, Plant ... [PAR] The Function of Soil Minerals and Trace Elements in Soil, Plant, Animal, and 
Human ... Ragweed, for example, is generally indicative of a phosphate/potash ... 
Joel Wallach: It's definitely a Copper deficiency, and you could revert to your .... 
as a soil amendment, a foliar spray, a fertilizer ingredient, or for making Bordeaux 
or... [DOC] [TLE] Pollen | definition of pollen by Medical dictionary [PAR] Looking for online definition of pollen in the Medical Dictionary?