Soil Points Analytics

Correlations between soil chemistry and soil survey (DualEM, Veris, Gamma) in Analytics allow the creation of new useful continuous layers.

When the soil site analysis and the underlying layer have high correlations the confidence level is also high that a new data layer can be produced.

In the correlation matrix, the auto-applied fit is linear; however, polynomial and logarithmic correlations can also be applied to create a more accurate equation.

In each correlation, a red, orange or, green line is shown. If the line is red the correlation is below 0.3 and a new layer can not be created. If an orange line is shown the correlation is between 0.3  and 0.6 and a new layer can be created with caution. If a green line is shown the correlation is above 0.6 and will allow a new layer to be created; however, caution should be used at all times. 

Below is a list of layers that can be created. 

Soil Clay Estimated
Soil AWC Estimated
Soil Field Capacity Estimated
Soil pH CaCl Estimated
Soil pH Estimated
Soil Cl Estimated
Soil Ca:Mg Estimated
Soil K Colwell Estimated
Soil DGT P Estimated
Soil PBI Estimated
Soil CEC Estimated
Soil Na% Estimated
Soil EC Estimated
Soil B Estimated
Soil P Colwell Estimated
Soil K Bray 1
Soil P Bray 1
Soil K Mehlich 3
Soil P Mehlich 3

Steps:

1. Select the layers from the list including the soil data which is stored in the different depths. 
   
2. After clicking run the following scatterplots will appear.
3. Calculations for Field Capacity, Wilting Point, Bulk Density, Hydraulic Conductivity, and Available Water Content are created on the fly when the data set contains Sand, Silt, and Clay measurements from the lab. Also, an additional soil profile analysis layer is created (shown below as the 0-90cm profile).

The correlations are presented in a matrix. Some correlation equations can be used to create a continuous layer. For example, the Soil Na% can be used with the DualEM 0-50cm layer to convert the DualEM layer to a Soil Na% to then create a variable rate gypsum application. The process of using correlation equations to create a continuous layer is shown below.

Steps:

1. Click the correlation you would like to create a layer for; not all correlations may be supported. The example here is Soil Na%. (This could be used to identify the potential of variable rate gypsum).
2. A popout will allow the user to identify outliers and remove them from the equation. 
3. Hover your mouse over the points to see the actual data and click to remove the point from the dataset temporarily. 
4. Clicking next will move to the save screen.
5. The layer values can be adjusted. On occasion, the formulas can create irrelevant numbers (eg. numbers less than zero). These can be adjusted.
6. The layer can be zoned but it is not necessary. Strip trials can not be added here; however, these layers can be opened in Rx and a Strip can be added there using the Multiple Product option.