AS1 = Soil Association 1
AS2 = Soil Association 2
 
The soil associations for the area of land that is being rated. Soil associations are categories of soils that have the same geologic deposit, same soil zone, and are affected by similar soil forming processes. In this example the first soil association (AS1) is WS (Whitesand Soil). It has a Climate Rating of 31 and an Organic Matter rating of 1. These two numbers are found directly beneath the WS on the field sheet.

There is no second soil association (AS2) in the example shown.

C = Climate Rating
The climate rating is based on a climate study completed for SAMA by the Department of Geography, University of Regina. In the study, titled "Evaluation and Mapping of the Climatic Factor in Rural Land Assessment in Saskatchewan, Using a Geographic Information System", Saskatchewan's rural municipalities were ranked based on their suitability for wheat production. Climate ratings are a maximum of 32 points.

OM = Organic Matter
The Organic Matter rating is based on a study of soil samples conducted from across Saskatchewan. Sampling done by the Saskatchewan Centre for Soil Research (University of Saskatchewan) has shown that the organic matter content of Saskatchewan soils varies from no organic matter on some sandy soils to a high of seven and one half percent for Melfort Soils. (The organic matter content is highest in the Black soil zone in northern and eastern areas of the province and is the lowest in the Brown soil zone in the south western part of the province.) An organic matter rating table was developed by assigning 0 index points to soils with less than 2.5% organic matter and a maximum of 13 index points to the soil with the most organic matter (7.5%). (For example a soil with 5.1 percent organic matter receives an organic matter rating of 5.1/7.5 x 13 = 9 points). Organic matter is a maximum of 13 points.

PMI = Provincial Market Index
(Located just under soil association on the field sheet) The provincial market index is the regressed dollar value per final rating point for each soil association. The PMI is used for converting the final rating to provincial average sale prices by soil type for agricultural land. The number 5.99 on the sample sheet is the PMI for Whitesand soil.

A regression line is a line of best fit through all the sale points which minimizes the differences in the dollar value per productivity rating point.


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