is NPK poison?

[M Farooq]

today i visited a seed shop to buy magnesium sulphate and potasium sulphate but none was present there so they gaveme npk.i don't know when u say 20 20 20.please explain me and also i wanna to ask dis this can i use this for all vegetables those have started flowering like tomato and mango.

I would second Farhan not to try chemical fertilizers...especially when someone experienced has not suggested so. Cow's manure is the safest

For the sake of your interest if you need to use chemical fertilizers later...20-20-20 reflects the percentages of essential elements in the fertilizers: nitrogen (N), phosphorous (P) expressed as an oxide P2O5 and and potassium (K) expressed as an oxide K2O. These things don't exist in reality in any fertilizer but it is just a matter of convenience for the sake of comparing different fertilizers.

[farah fayyaz]

I would second Farhan not to try chemical fertilizers...especially when someone experienced has not suggested so. Cow's manure is the safest

For the sake of your interest if you need to use chemical fertilizers later...20-20-20 reflects the percentages of essential elements in the fertilizers: nitrogen (N), phosphorous (P) expressed as an oxide P2O5 and and potassium (K) expressed as an oxide K2O. These things don't exist in reality in any fertilizer but it is just a matter of convenience for the sake of comparing different fertilizers.

Please make me clear,if i've got npk,these 3 fertilizers are present in this or next time when i want to use chemical fertilizer i should use these fertilizers in 20-20-20 ratio

[M Farooq]

I would second Farhan not to try chemical fertilizers...especially when someone experienced has not suggested so. Cow's manure is the safest

For the sake of your interest if you need to use chemical fertilizers later...20-20-20 reflects the percentages of essential elements in the fertilizers: nitrogen (N), phosphorous (P) expressed as an oxide P2O5 and and potassium (K) expressed as an oxide K2O. These things don't exist in reality in any fertilizer but it is just a matter of convenience for the sake of comparing different fertilizers.

Please make me clear,if i've got npk,these 3 fertilizers are present in this or next time when i want to use chemical fertilizer i should use these fertilizers in 20-20-20 ratio :?:

You are partially correct. When a fertilizer labels says NPK 20-20-20 it means all major elements (Nitrogen, Phosphorous, and Potassum) are already present- mixed by the manufacturer in the ratio 20-20-20 explained above . Use it as it is...You can't change the ratios, except that you buy a different brand of fertilizer.

So a suggestion again: Don't use chemical fertilizers if you are not comfortable with dosages. A slight excess can easily burn your plants. So start with simple natural things which God has given us: Manure!

Regards,
Farooq

[Khirmun]

Why do you guys say NPK is micro plant nutrients? They're macro nutrients.
And they are not poisonous. I have had a ton of potassium nitrate, potassium dihydrophosphate in powder form came in contact with skin (in chem labs). Just wash your hands and thats all you need to do.