Soil Smarts Episode 6: Fertilizer Calculations

[@chemististhebestinlife6708]

Thank you, can you calculate Suspension NPK 13: 40:13 SuspensionNPK 22:22:23

[@keatonbjorklund2988]

Do you multiply 3 or 0.3 by 0.44? Thanks

[@MohamedSaad-cd8fi]

It the same thing by gram?

[@alyatwa6654]

Thank you

[@fisenknan3981]

V Good. This is a more accurate calculations.

[@danielmansaray87]

How do you get to the fractions

[@neerajkataria5461]

Dear TSU,I wanted a product with label as 3:20:20..how to make I have 12.61.00 and 0.52.34 and 0.0.50 and 13.0.45 fertilizer how should I mix to get the ratio 3:20:20

[@neerajkataria5461]

For 1000 gms

[@entertoby6698]

Thank you!

[@entertoby6698]

When I multiplied 3% by 0.44, I got 0.0132 without having to divide by 100, like he did in the video.

[@Tenpennycustoms4958]

How do you know “we need 100#?”

[@japhetcawag2502]

hw did you get the 44% and 83%

[@TSUExtension]

Thanks for your question! The 44% comes from the proportion of phosphorus in P2O5 based on its molecular weight. Phosphorus is 31 grams (per mole) and oxygen is 16 grams (per mole) so P2O5 = (2 x 31) + (5 x 16) = 62 + 80 = 142. The proportion of phosphorus in P2O5 is (2 x 31)/142 which gives 62/142 = 44%. Same for K20 and 83%....Potassium is 39 grams (per mole) and oxygen is 16 grams (per mole) so K2O = (2 x 39) = (16) = 78 + 16 = 94. The proportion of potassium in K2O is (2 x 39)/94 which gives 78/94 = 83%

[@reciclageschipenchipen5264]

@@TSUExtension thank you I just learn this now, not good at chemistry continue teaching others

[@reciclageschipenchipen5264]

@@TSUExtension all fertilizer that used P2O5 and K2O for formulating fertilizer or diffretent Manufacturer used different ingredients ?

[@jaysonlloveras6329]

Hi there Can you pls help me to solve mine?my plants need 540N 310 P2O5 and 250 K20 grams/pillar. How much fertilizer I apply?

[@TSUExtension]

This depends upon the proportions of each in the fertilizer product you are planning to use.

[@davem2881]

how do you calculate a 22-0-4 to a 3.5 per 1000 sq ft rate to a scott's edge guard pro ? love the video !

[@TSUExtension]

Thanks! Is the 3.5 for nitrogen?

[@davem2881]

@@TSUExtension yes

[@shadowbreakermusics327]

May exam kami ng 10-11🙂