It depends on what type of crop you are growing, there are many types of fertilizers for flowers, house plants, outdoor, tropical, seasonal, ect.
But i have found they best type of soil or fertilizer is to make a compost (with old peels, skins, rotten fruit and vegetables; things like that), let it decay and set in a gardening area and your soil will be fertile in notime
Nitrogen is a fertiliser that encourages green growth, but, as it also encourages soft growth it is better used in a balanced fertiliser.
A general balanced fertiliser applied in Spring and watered in is best.
Artificial fertiliser tends to be more acidic in nature. It can lower soil pH levels over time if not balanced with other soil amendments.
I would think that at 10 it is too high in Nitrogen. A balanced fertiliser is best.
20-20-20- is a balanced fertiliser. 15-30-15- is a high Potassium fertiliser. Which type of fertiliser applied depends on what result you require. Nitrogen promotes vigorous growth. Phosphates helps strong root growth. Potash improves flowering and fruiting. Their are also Trace Elements added to fertiliser mixture to balance out any shortages. So you must decide what your plant requires and then provide the proper mixture.
commercial fertiliser is fertiliser made by a certain company.
If the grass is already in place then a balanced chemical fertiliser would have a quicker effect but if the grass has not been sown then good compost mixed in the topsoil will be a benefit.
Buya lot of Chili seeds. Plant them in dirt, then water them and fertilise with red fertiliser. Then sell them. Fertilised chillies are worth more but if you can't get fertiliser don't worry they sell for $300 without fertiliser and $600 with fertiliser.
yes Further answer Not necessarily. Seeds don't take in fertiliser. But they take in water that may have fertiliser in it. But this fertiliser may not make them germinate faster.
depends entirely on the type and concentration of the fertiliser you are using
no
It depends what type of fertiliser. for example chemical. it will help seeds growth, but too much will burn the plant. But usually fertiliser does increase seeds growth. Just not too much of it. It is a fact that chemical fertiliser is less healthy than organic fertiliser. Hopt this helps :)