2006-11-02 02:56:36 · 4 answers · asked by Deborah B 1 in Science & Mathematics ➔ Engineering
you cannot make such a conversion
2006-11-02 02:59:12 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Answer 3 sounds right if that's the problem. However, if the manufacturer of a fertilizer recommends you use x weight of fertilizer per unit weight of soil and you have an area y of field to fertilize, you need more information than you have given. What you also need to know is
What is the depth z through which the fertilizer spreads?
What is the density d of the soil?
Then you can get the required mass of fertilizer f as follows:
v = z * y (this is the volume of soil being treated)
m = v * d (this is the mass of soil being treated)
f = m * x
Or if you want area density q as your question suggests,
q = f / y
Notice I have avoided giving units, since your problem statement already has units that require scaling to be compatible in this application.
2006-11-02 11:20:05 · answer #2 · answered by kirchwey 7 · 0⤊ 0⤋
Is the problem like this?
I have fertilizer that contains 50 grams / kg of bone meal. I want to spread it on a field at so that the field gets 5 kg. of bone meal per hectare. How many hectares can I cover?
Ans: I would need 100 kg of product to get 5 kg of bone meal, so I would spread 100kg of fertilizer product per hectare.
2006-11-02 11:02:13 · answer #3 · answered by DanE 7 · 0⤊ 0⤋
You don't.
2006-11-02 11:01:10 · answer #4 · answered by Nuno B 1 · 0⤊ 0⤋