Agronomic Requirements and Crop Removal are not updated when user modify soil test parameters.

[dmitri-korin-bcps]

Steps to reproduce: 
1.     Navigate to the Soil and Leaf Tests tab
2.     Add soil test results
3.     Add leaf test results and click Calculate and then Add to Field
4.     Modify Soil Test results
5.     Navigate to the Calculate Nutrients screen and note that Agronomic Requirements and Crop Removal values are not updated
 
Expected behaviour: The program should recalculate the Agronomic Requirements and Crop Removal values when a user modify soil test results