Calling all math geeks

[redglasses]

https://docs.google.com/spreadsheets/d/ ... sp=sharing

I ran an experiment yesterday to determine the conversion rate for mineral fertilizer between kg and l, and was wondering if someone could check over my math to make sure it's all correct. I'm a little rusty as I haven't been in a math class for the last couple months, so if you do find something wrong please let me know

[Illinois Farmer]

Your x value is backwards according to your work. You should have divided that 30 by 213 instead of 213 by 30. You did the same on the y value.

[Bryan83]

The only thing I'm noticing is that you changed the product being measured in your equation. It states that 30.8kg of Nitrogen was added by 6.92L of fertilizer, so by my understanding of your work what you actually proved was that 6.92L=1kg of nitrogen/ha, not the actual weight of the fertilizer itself. Unless I'm missing something?

[FSarndrone]

^^^^^^^^^^^^^^^^^^^^^

[redglasses]

Your x value is backwards according to your work. You should have divided that 30 by 213 instead of 213 by 30. You did the same on the y value.

Thats exactly what I was thinking would happen Just a silly little error, fixed.

[redglasses]

It states that 30.8kg of Nitrogen was added by 6.92L of fertilizer

30.8 kg of nitrogen was added by 213l of fertilizer.

so by my understanding of your work what you actually proved was that 6.92L=1kg of nitrogen/ha, not the actual weight of the fertilizer itself.

Yes this is exactly correct, lets say you wanted to raise the nitrogen level of a 1ha field by 1kg/ha it would take 6.92L of fertilizer.

[oliss]

Thanks for post

[SimulatedFarmer]

My head hurts.

[ScotsDude73]

Yeah math usually gives you a headache!! I know people like to get into the maths on the game which can be interesting. I just fill the spreader and drive up and down the field. I know irl a farmer would calculate out how many kg of fertilizer he would require on his field in order to get the best yield possible and to calculate costs etc. Number crunching is not my thing. Takes me all my to calculate my living expenses every month!!