Nematologist The pine tree species that are most susceptible to pinewilt disease are not native to North America. They come from the soil and from applied fertilizer.
Plants obtain carbon, hydrogen and oxygen from the air or through the soil.
The analysis or grade refers to the minimum amounts of N,P2O5 and K2O in the fertilizer. Liquid fertilizers have gained importance over the years in landscape management and nursery production. The percentage of P in P2O5 is 43.6 so multiplying the pounds of P2O5 by .436 gives the pounds of actual P in a fertilizer. The percentage of K in K2O is 83, so multiplying the pounds of K2O by .83 gives the actual K in a bag of fertilizer. If any of these elements are not present in the formulation, a zero appears in the analysis.