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A good fertilizer for agriculture is usually high in nitrogen.
A good fertilizer for plants is "nitrogen" It can be found in soil in small amounts, or you can increase the amount of nitrogen, and buy fertilizer from a store.
Cheap fertilizer is not good and good fertilizer is not cheap. So, chemical fertilisers are expensive because they contain nitrogen, phosphorus and potassium elements.
Most common garden fertilizers are safe to use even directly over the well area. This is because most of the components of the fertilizer are not mobile within the soil. This means that at the molecular level, the particles of fertilizer attach themselves to clay particles within the soil, and thus are unable to move any deeper than tilling depth. The one component you need to watch is the nitrogen component, because some formulations of nitrogen will move down through the soil profile. If your fertilizer has an ammonium-type formulation of nitrogen, and you fertilize to only the level your garden needs, then even that will not move down to the level of your well.The amount of nitrogen in your fertilizer is indicated by the first number of three on the label. Thus, a 32-16-9 fertilizer is 33% nitrogen. The "analysis" part of the label will tell you what kind of nitrogen it is, whether ammonium or nitrate. Nitrates are somewhat mobile within some soil types, especially if they are over-applied.Additionally, some soil types simply do not allow nutrients to leach down through the soil at all. Heavy clay-type soils are a good example of this.If you still have concerns, 50 feet is a safe distance from any potential contaminant. I am unaware of any contaminent of any type that can move 50 feet sideways through the soil. Surface runoff must be considered as well, since that can move much greater distances very easily.
I like to use it because it is a balanced fertilizer. It contains even amounts of nitrogen, phosphorus, and potassium. As to how effective any given fertilizer is will depend on what you are trying to grow. If you apply a fertilizer that is rich in nitrogen and little of the others (phosphorus and potassium), for example, then the plant will have a relative tendency to grow more leaves and less roots and flowers. This isn't good for your roses and zinnias, but higher nitrogen is great for your lawn. So using a balanced fertilizer is good all around, covers all the bases.
You can find a wide variety of garden fertilizers at such places as Walmart or K-mart. But local garden centers provide lime, garden soil and other kinds of special fertilizers needed for the garden.
A fertilizer high in nitrogen and a mulch high in organic material describe respectively good inorganic and organic fertilizers for yews. An example of a high-nitrogen fertilizer is 16-8-8, with the last two numbers representing phosphorus and potassium inputs. An example of an organic mulch is cocoa bean hulls, compost, lead mold or shredded bark.
azolla is a good substitute for commercial fertilizers because it is cheap and rich in nitrogen
KaN fertilizer is Koch Advanced Nitrogen, and it is very good for keeping vegetables healthy. It helps them obtain nutrients by having over a third more nitrogen available.
"Nitrogen" in fertilizer is in the form of bioavailable nitrogen ... nitrates and/or ammonia salts ... so yes, it would lower the melting point of water and "melt ice" the same way that rock salt does.
Worms eat dirt and other items in the soil and excrete nitrogen, which is a very good fertilizer.
Yes, deer scat makes good garden fertilizer as a deer repellent and as a summer application even though no, it makes poor garden fertilizer because of bacteria, disease and winter deprivations. Deer scat may harbor chronic wasting disease and Escherichia coli and offer higher nutrient levels in summer and lower in winter. Hot composting processes of mixing and turning air, carbon, nitrogen and water to generate heat to 140 degrees Fahrenheit (60 degrees Celsius) for at least five days and composting for at least 40 days will eliminate E. coli even though neither heat nor time terminates the disease.