useful link-fertilizer calculator

[wtnhunt]

While some in here may not need this or may already use something similar, thought this was pretty cool http://www.tulsamastergardeners.org/blackbox/fertcalc.htm. Ran across this the other day when I was looking trying to find some pricing on bagged fertilizers. This calculator will tell you by your soil sample results and by what fertilizer you are using just how much you need for the size plot you are planting. Breaks down how much exactly of what your needs are in Nitrogen, phosphorus, and potassium as well.

[Ravin R10 man]

Thanks William, will be using that on site!!

man, if you have a soil test in hand..this will save lots of $$$$

[Tominator]

That's cool William.

What would an average soil test be? I have no idea what my soil tests out to. I know we are always on the alkaline end because of the clay around here.

[wtnhunt]

What would an average soil test be? I have no idea what my soil tests out to. I know we are always on the alkaline end because of the clay around here.

We use the ag extension here, the samples go to UT. The basic sample they tested for ph, phosphorous, potassium, calcium, and magnesium. They make suggested rates for nitrogen, phosphate and potassium based on the type of crop you chose them to test for. Here it runs $6 for the basic test, plus you have to pay to ship your dirt, around $2.50-$3, and you can chose more than one type of crop for each sample. We selected warm season grains for Christina's plot, and out of curiosity, I also selected cool season legumes for the same plot, could have chosen more different crops for them to give recommendations for if I wanted to.

The suggested rates they gave for her plot for warm season grains was 90/60/180 lbs.(N/P/K) per acre and for the cool season legumes was 0-15/60/90.

With the calculator, you just plug in the suggested rate, then how much square footage or acres and what type of fertilizer you have example 6-12-12 or 13-13-13 or whatever and it will break down for you not only how much of that particular fertilizer you need, but also will tell you individually how much of each (N,P,K) you need which would be great if you have the ability to get custom mixed fertilizers.