dmitri-korin-bcps
commented
10 months ago Andrews, Josh AF:EX We do need the calculator to change the calculations if the user skips the leaf or soil test inputs. I see three possible scenarios for input of these two items: 1) Soil test data without leaf test data, 2) Leaf test data without soil test data, 3) Neither soil test nor leaf test data. Here's what I think the calculator should do in these scenarios:
1) Soil test entered but leaf tests not entered Calculator should assume that user selected the ‘High’ options for Leaf Test P and K (> 0.10% and >0.4%, respectively) Message: For fields without a leaf test, ‘High’ leaf P and K content will be assumed. Crop P and K requirements will be 0 on fields without a leaf test. 2) Leaf test entered but soil tests not entered Calculator should assume that user has ‘High’ soil test P and K (as the calculator already does) High soil test P and K for blueberries (using the Kelowna method, which is what the calculator converts the soil test information to): 100 ppm P 300 ppm K Message: For fields without a soil test, very high soil P and K fertility and a pH of 4.0 will be assumed. Crop P and K requirements will be based on the results of leaf testing. Neither soil tests or leaf tests entered Calculator should have both assumptions for missing information listed above Message: For fields without a soil test, very high soil P and K fertility and a pH of 4.0 will be assumed. Crop P and K requirements will be based on the results of leaf testing. For fields without a leaf test, ‘High’ leaf P and K content will be assumed. Crop P and K requirements will be 0 on fields without a leaf test.
Currently if leaf test results are missing the values of Agronomic Requirements and Crop Removal are equal to zero. The program should still calculate them based on the default leaf test result values.