OrganiCalc Change Log

Change log:

Mar 15, 2019 – Update to version 5.1C
>>Changed Soil Type to not mandatory and set default to 68% Ca / 12% Mg
>>Added Wollostonite note
>>Fixed some non-reporting note numbers

Mar 6, 2019 – Update to version 5.1B (versions 5.0 and 5.1A not published)
>>Made the form responsive
>>Added entries for Co, Mo, Si, As and EC
>>Changed the pH level at which gypsum is recommended over ag lime from >= 6.6 to >= 6.2
>>Added mandatory entry for Soil Type.
>>Changed target Ca% from 68% to 68% for Clay, 65% for loam or sand
>>Changed target Mg% from 12% to 12% for clay, 15% for loam or sand
>>Changed the note regarding lower rock phosphate levels to also include a lower recommendation for Zn
>>Added the notes “Try to get organic matter to 5%; 10% is better, 30% is more than enough” and “A one-time application of biochar will improve yields and quality in about 3 years.” to the note on adding vermicompost (always visible).

July 10, 2018 — Update to version 4.1C
>>Changed sodium note to include how much to water (6″-12″)
>>Changed vermicompost note to clarify organic matter target at 5% with 30% as a maximum

June 27, 2018 — Update to version 4.1B
>>Recompiled under SCV10 to eliminate possible license error

June 2, 2018 — Update to V4.1A
>>Corrected inaccurate amendment quantities when the sample depth is other than 6″.

May 10, 2018 — Update to V4.0H
>>Changed note regarding Nitrogen to include (feather meal)
>>Added note regarding vermicompost under transplants, always visible.

April 21, 2017 — Update to V4.0F
>>Changed note regarding epsom salts to recommend a contro plot be used.
>>Removed sulfates from the list of sulfur containing amendments to be spread over multiple years

August 28, 2017 — Update to V4.0E
>>Changed PDF pagination to shorten report to 2 pages
>>Updated form format to latest version

February 6, 2017 — Update to V4.0D
>>Fixed error in allowing rock phosphate to be recommended in pH > 7.35.

January 25, 2017 — Update to V4.0C
>>Fixed Nitrogen reporting
>>Fixed NaN error in certain cases
>>Changed to always supply sulfur with gypsum for pH < 7.1

October 29, 2016 — Update to V4.0A
>>Added a box where the user may change the amount of N in the recommendation. The default value is unchanged at 100 lbs/acre.
>>Added compost to the recommendation. The user may choose from two lists of composts or may enter their own. N, P (as P2O5) and K (as K2O) of the chosen compost(s) will be accounted for. The user-defined compost will be used first, if selected. The old pull down list of nitrogen amendments has been removed.
>>Added a note to warn the user to choose a nitrogen source with N-0-0 in the case that not enough N to reach the target is being supplied.
>>Added a note to refer the user to this page for more information: https://growabundant.com/how-much-nitrogen-shall-i-add/
>>Changed the Zn target to the smallest of P(target)/10, P(measured + application limit)/10 and 80 lb/ac.
>>The note to split sulfur application over several years is displayed for all pH’s.
>>Added a note to suggest adding enough gypsum to a small area to bring the Ca up to 2000 lbs/acre in case the measured plus recommended addition of Ca is lower than 2000 lbs/acre.
>>Minor reformatting of notes area

May 20, 2016 — Update to V3.5B
>>Fixed problem with soil sample depth other than 6″ not allowing the spreadsheet to run.

May 10, 2016 — Update to V3.5A
>>The need for the ppm check box has been removed. OC now senses lbs/acre or ppm automatically. Typo’s are still sensed and OC will not run until they are corrected.
>>The default area has been changed to 1000 sq ft.
>>OC will now display up to 4 error messages about the soil test.
>>The typo messages about Ca%, Mg%, K% and Na% are compressed into one cell.
>>A problem with display of the note to split sulfur applications over several years has been corrected.
>>Changed the table column heading from “Worksheet Result” to “Amount to be applied” and from “Measured plus worksheet result” to “Measured plus amount to be applied”.
>>Changed note: From: “Epsom salts are used for quick release Mg. Don’t apply the entire recommendation at once. Broadcast 1 cup per 100 sq. ft. (250 ml/10 sq. m.) and mix well into the soil before planting. During the growing season use 1 tbsp/gal (4 ml/l) as a drench or foliar.” To: “Epsom salts are used for quick release Mg. Don’t apply the entire amount at once. Broadcast 1 cup per 100 sq. ft. (250 ml/10 sq. m.) and mix into the soil. Periodically use 1 tbsp/gal (4 ml/l) as a drench or foliar.”
>>If pH < 7.1 and the surfer target is either 80 (CEC >10) or 50 (CEC <=10) then do not use gypsum unless it is needed to fill the remaining sulfur, after all other amendments are considered. If the conditions are not met, use gypsum as before.

April 22, 2016 — Update to V3.4F
>>Changed the order of amendments. If pH > 6.4, try Sul-Po-Mag before Dolomite; if pH <= 6.4 try Dolomite first.

>>If pH <= 5.7 do not recommend MnS

>>If pH < 7.1 and the surfer target is either 80 (CEC >10) or 50 (CEC <=10) then use gypsum to fill the remaining sulfur, even if the calcium target is exceeded. If the conditions are not met, use Ag Sulfur as before.

>> Changed note: From: “We prefer to apply the lime as soon as possible and the balance of the amendments before planting.” To “We prefer to apply the lime as soon as possible and the balance of the amendments before planting. Conduct a fizz test on each soil sample for the next three years.”

V3.4E not released

March 19, 2016 — Update to V3.4D
>>Fixed OrganiCalc not finding boron deficiency if a text value is entered in the cell, e.g. “<0.2”

>>Added an alert for areas smaller than 10 sq feet or 1 sq meter.

March 13, 2016 — Update to V3.4C
>> Changed this calculation:
From: If pH <=7.0 and Ca base saturation < 60%, add ag lime to 60% of CEC.
To: If pH <=7.0 and Ca base saturation < 60%, add dolomitic lime as necessary to supply any needed Mg, then add ag lime to 60% of CEC.

>>Changed the name on the form to OrganiCalc for Vegetables.

March 2, 2016 — Update to V3.4B
(V3.4A was never released)
>> Changed this calculation:
From: Always add lime to 60% of CEC
To: Add gypsum instead of lime to 60% of CEC if pH > 7.0, else add lime to 60%
>> Changed this calculation:
From: Do not act on test results which are only +- 10% of target.
To: If pH < 5.9 Always add Ag or Dolomite lime to 68% of Ca saturation, else do not act on test results which are only +- 10% of target. >> Removed this note:  We have lowered our phosphorus target, so more high phosphorus composted manure or vermicompost may and should be applied.
>> Added this note: (if Area to be Amended is > = 1 acre, display this note) The minimum P for large areas is 100 lb/ac, the minimum P2O5 is 227 lbs/ac.
>> Changed note:
From: 6 <> It is preferable to apply the agricultural lime as soon as possible and the balance of the amendments before planting.
To: 6 <> We prefer to apply the agricultural lime as soon as possible, and the balance of the amendments before planting. Use the TEC from this test for 3 years after applying lime.
>> Changed note:
From: 13 <> Phosphorus is especially unavailable at this pH. Increase the biological activity of your soil with active compost and/or feed with a phosphoric acid stabilized fish hydrolysate.
To: 13 <> Phosphorus is especially unavailable at this pH. Increase the biological activity of your soil with active compost and/or drench with a phosphoric acid stabilized fish hydrolysate (approximately 2-4-0).
>> Changed note:
From: 9 <> Consider reducing the amount of potassium sulfate if compost is to be applied.
To: 9 <> Consider reducing the amount of potassium sulfate if compost is to be applied. If you need P as well as K, your soil is a good candidate for composted manure instead of potassium sulfate and rock phosphate.
>> Changed note:
From: 16 <> Application of sulfur containing materials (gypsum, sul-po-mag) should be split over two years.
To: 16 <> Application of gypsum should be split over (Examine % of target this application and figure how many years (example: 220%; 2 years 340% 3 years, 415%, 4 years)
Note 16 now only appears if the amount to be applied is > 150% of target and the pH is < 7.1. The note suggests spreading it over 2 years if the amount to be applied is >151% of target (or 3 years if >251%, etc.), regardless of the measured amount.
>> Changed note:
From: Your TCEC is lower than 7.0 and therefore your soil does not hold nutrients well.  Apply small amounts of fertilizer regularly.
To: Your TCEC is lower than 7.0 and therefore your soil does not hold nutrients well.  Apply small amounts of a balanced fertilizer regularly.
>> Fixed a problem where Mn addition was displayed in the table, even if withheld because of low pH.
>> Fixed typo in this note: Mn is low but none should be added to the soil until the pH comes up. Foliar feed MnSO4at 1 Tbsp/gal (1/4 ml/l). Retest next year. 
This note needed a space before “at”.
>> Deleted hard stop for excess sodium. Now OrganiCalc continues to run in the case of excess sodium, and displays the same warning: Sodium is greater than 3% of CEC. Water, re-sample and re-test to confirm results. If confirmed, consult a soil analyst.
>> Changed table heading from “How’d we do?” to “How’d we do? % of Target this Application”
>> Corrected bad info from Wikipedia
Changed From: Copper Sufate Heptahydrate (Blue)
Changed To: (Blue) Copper Sulfate Pentahydrate
>> Changed Warning:
From: (Calcium, Mg, K, or Na) % does not match entered CEC and Calcium value found. Check for typo.
To: (Calcium, Mg, K, or Na) % does not match entered CEC and Calcium value found. Check for ppm on test report or typo.
>> Added this material to the “Where to Buy Amendments List”:
Phosphoric acid stabilized fish hydrolysate (approximately 2-4-0) http://www.groworganic.com/pvfs-organic-liquid-fish-2-4-0-2-gallon.html

June 18, 2015 Update to V3.3A
>>Reordered how the recommended amendments are determined so that SulPoMag is found before potassium sulfate and epsom salts
>>Changed the Mg application limit from 10% of target to 90% of target
>>New rule: if the amount of an element that is needed to bring it to the target levels is less than 10% of the target, that requirement is ignored.
>>Changed the trigger for excess calcium from 72% to 80%. This affects the sulfur target.
>>Added note to display only if recommended sulfur is >200% of target: “Application of sulfur containing materials (listed here) should be split over two years.”
>>Added note: “It is best to have at least 2 soil samples and tests before adding Mg; once you put it in, it’s hard to get out. For dolomite or epsom salts or SulPoMag”
>>Changed the note: “It is preferable to apply the agricultural lime in the fall and the balance of the amendments the following spring” to: “It is preferable to apply the agricultural lime as soon as possible and the balance of the amendments the before planting.”

Apr 3, 2015 Update to V3.2A2
>>Fixed bug that erroneously recommended lime for soil tests with depths much greater than 6 inches.

Jan 26 2015 Update to V3.2A
>> Fixed Logan reporting of phosphorus in ppm to reflect P not P2O5.

Jan 18 2015
>> Changed add compost note to read “We have lowered our phosphorus target, so more high phosphorus (P) composted manure or vermicompost may and should be applied.” Changed the trigger to display the note to <200%P and <6.5%K Jan 10 2015 Update to V3.1A. >> Fixed display of errors for soil depths not equal to 7″.
>> Reduced P target to the greater of K/2 or 250 lbs/acre.
>> Added the note “We have lowered our phosphorus target, so more composted manure or vermicompost may and should be applied,” which is displayed whenever measured plus recommended P is less than 200% of target and K is less than 8% saturation.
>> Removed the note: “Apply additional composted manure or vermicompost to supply phosphorus.”

The algorithm prior to these changes may be accessed here.