From

Location

Message

Date Posted

West Paris Me.

Does anyone have to calculation to change lbs per acre to ppm? thanks

2/4/2013 11:08:09 AM

Foley, Minnesota

Divide lbs/acre by 2. 300 lbs/acre= 150 ppm

2/4/2013 12:07:12 PM

im not so sure that old divide by 2 is always as easy as that
theres alot of soil sites that claim average plow depth per acre of 6-8 inch deep weighs 2 million pounds and they make calculations from that in pounds per acre

2/4/2013 1:49:59 PM

Partlow,Va

My soil sample was done at Va Tech.
per Va Tech Soil Testing Lab "To convert from ppm(wt.basis) to lbs/acre the equation is: ppm in soil X 2 = lbs/acre where weight of an acre furrow slice(6 2/3" depth) is assumed to be 2 million pounds."

Unless I'm wrong it seems that each farmer/grower needs to adjust for whether their farm has heavier or lighter soil.

Like Don said check your soil report/lab individually and also know your soil type.

2/4/2013 10:53:48 PM

West Paris Me.

thanks guys

2/4/2013 11:54:36 PM

South Bloomfield, Ohio

Another formula: PPM x 2.72 = lbs. per acre-foot

2/5/2013 5:33:27 AM