STON RATE = Stone Rating
Discount for annual stone removal and the wear and tear on farm equipment which includes the rating assigned and the point discount. In the example the stone rating is ST 3.0 which is an annual stone removal of .2 to .3 cubic yards per acre or approximately 40 rock picker loads of stone per year per quarter.

This category is an economic factor which adds to the cost of production and is expressed as point deductions.

Abbreviations:
1.0 = 0.05 cubic yards/acre annual removal
2.0 = 0.10 - 0.15 cubic yards/acre annual removal
3.0 = 0.20 - 0.25 cubic yards/acre annual removal
4.0 = 0.30 - 0.40 cubic yards/acre annual removal
5.0 = 0.45 - 0.60 cubic yards/acre annual removal
6.0 = 0.66 - 2.00 cubic yards/acre annual removal
N/A* = >2.00 cubic yards/acre annual removal

* Although there is an N/A classification in the manual, it is not applied as the land is classified as too stony for arable agriculture. Such lands should be rated as pasture or hay lands if there is greater than 2.00 cubic yards of annual removal per acre.


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