Precision farming system with scaled soil characteristics

1. A method of indicating a characteristic of a soil sample of a field, the method comprising:

measuring a plurality of co-factors in the soil sample, the plurality of co-factors comprising a pH of the soil sample and a phosphorus content of the soil sample;

using the plurality of co-factors to place the soil sample in a soil sample group;

measuring the characteristic of the soil sample;

scaling the measured characteristic based on the soil sample group the soil sample is placed into to form a scaled measure;

displaying the scaled measure to better represent the characteristic of the soil sample relative to soil samples of the sample group.

2. The method of claim 1 wherein the characteristic of the soil sample comprises a phosphorus storage capacity of the soil sample.

3. The method of claim 1 wherein the characteristic of the soil sample comprises a biologic function of the soil sample.

4. A method comprising:

using a pH of a soil sample and a phosphorus content level of the soil sample to select a group of soil samples;

measuring a characteristic of the soil sample to produce a measured value;

scaling the measured value based on measured values determined for soil samples in the group of soil samples to form a scaled value;

displaying the scaled value instead of the measured value so as to improve a precision farming system.

5. The method of claim 4 wherein the characteristic comprises a phosphorus storage capacity of the soil sample.

6. The method of claim 4 wherein the characteristic comprises a phosphorus mineralization function.

7. The method of claim 4 wherein the characteristic comprises a phosphorus solubilization function.

8. A method comprising:

using a pH level and a phosphorus level of a soil sample to select a sample group for the soil sample;

determining a measure of phosphorus storage capacity of the soil sample relative to soil samples in the sample group;

and

displaying a user interface depicting the measure of the phosphorus storage capacity.

9. The method of claim 8 further comprises determining a biologic measure of the soil sample relative to soil samples in the sample group.

10. The method of claim 9 wherein the biologic measure comprises a mineralization function measure.

11. The method of claim 9 wherein the biologic measure comprises a solubilization function measure.

12. The method of claim 9 wherein the biologic measure comprises a combination of a solubilization function measure and a mineralization function measure.

13. A method comprising:

using a pH of a soil sample to select a group of soil samples;

measuring a characteristic of the soil sample to produce a measured value;

scaling the measured value based on measured values determined for soil samples in the group of soil samples to form a scaled value, wherein scaling the measured value comprises determining a maximum value for the characteristic for the group of soil samples, determining a minimum value for the characteristic for the group of soil samples and using the maximum and minimum to scale the measured value;

displaying the scaled value instead of the measured value so as to improve a precision farming system.

14. The method of claim 13 wherein determining the maximum value for the characteristic comprises determining a maximum value that is less than a largest value for the characteristic measured for a soil sample of the soil sample group.

15. The method of claim 14 wherein determining the minimum value for the characteristic comprises determining a minimum value that is more than a smallest value for the characteristic measured for a soil sample of the soil sample group.