The effects increase with increasing fertilizer

Increased fertilizer does not increase growth rates, even within a given plant. The responses of many plants to fertilization have been well studied, there is a point of diminishing or decreasing with increasing applications of fertilizer. In “Soils: An Introduction to Soils and Plant Growth” by Donahue et.al. shows a graph of plant growth response to fertilizer application. The curve is sigmoidal (“S-shaped”), not linear. There is a plateau in the growth response as there is an increase of fertilizers and fall as it becomes more intense, indicating that the increase of fertilizer becomes more harmful than good.
Donahue et.al. writes:
“As more and more fertilizer is added, the gain in productivity of each successive increment is dwindling … The downward trend with the increase of excessive fertilization, due to reduced harvests due to things such as salts and unbalanced growth (which may increase plant susceptibility to disease and abnormal growth). ”
Optimal amounts of fertilizers
There is definitely an ideal amount and regime of fertilizer for each tree (which varies from tree to tree) and above this can be harmful. Dr. Carl Whitcomb in “Plant Production in Containers” also warns of excessive fertilizer application and unbalanced. He writes: “The ideal level of a nutrient for plants is probably limited in scope, rather than a certain level. Note that hidden … toxicities may occur long before symptoms of toxicity appear … “. It also shows a similar growth response curve versus fertilizer. I read that such warnings about excessive fertilizer applications in all the references I have in plant nutrition. Again, and not directly increase growth, increased levels of fertilizer can cause problems.
Stations appropriate
Plant growth also differs in times of growth. There are some new plants that emit continuous growth during the spring and summer, as Nana junipers and dull, and some issuing only the new growth in spring. The application of large quantities of fertilizers for all trees can result in more growth in some but not all. Adding high levels of fertilizer throughout the summer is undoubtedly a waste, since no new growth will be triggered.