Phosphorus Management

[@shesmypresident1637]

I made ammonium phosphate with 1 part phosphoric acid (rust inhibitor) to 2-3 parts household ammonia , tested 1 part 20 H2o on my croton plants and they bloomed

[@chrisrose7210]

You two guys are the best ag lecturers in the world!!!! Thanks from Australia :)

[@AgPhD]

Thanks, Chris!

[@johnlim123]

My soil test is 600~800ppm for phosphorus. I am adding 40lbs per acres each season but that's to help my cabbage seeds from germination then that's it. South New jersey all my neighbors too. Not sure if it's all available but how can I slowly reduce that number? Buckwheat? Any other ideas?

[@user-ks5cg5cd7m]

Does this mean that the phosphate I just added to the top of my garden did not move into the soil at all?

[@Polly_99]

What about using a product called Top Phos in seedrow?

[@AgPhD]

Brian addressed your question on Ag PhD Radio: on.soundcloud.com/qZT5r

[@Polly_99]

My apologies that was incredibly vague. This is a product that is 3-28-10C-9S, (liable marine calcium and AMS) we have also used a 8-30-6.7S blend of Top Phos. The salt index is 9 compared to a MAP at 27ish. They claim it to be a hydrosoluble calcium and humic substance which they referred to as CSP (Complexed Super Phosphate) They claim it does not get tied up in Al, C or Fe because of the humic bond and calcium bridge in the molecular structure. It has worked extremely well for us in our high pH soils. It appears to be 90-95ish% available in year 1. Where we have seen the differrence is in emergence early on, and abiotic and biotic stress tolerance. (which is perplexing) ,especially in both dry and wet growing years. Ironically enough soy beans and canola have responded incredibly well to this practice. 60-70lbs seedrow, as close to the seed as practical. We are curious to know your thoughts and opinion on this practice and if you guys have ever played with highly available, low salt phos products in seedrow. You guys are awesome! You have quite the following North of the Border!! Thank you for what you do!! @@AgPhD

[@AgPhD]

@@Polly_99 Brian addressed your comments on Ag PhD Radio: on.soundcloud.com/SZhrW

[@pierreperrin7069]

Good information, but you should mention that a part of the phosphorus in some fertilizer gets tied up to the soil when the pH is to low. Some P fertilizer are protected to prevent this issue and make the phosphorus more available to the plant, but is it effective or just advertising from the fertilizer company ?

[@AgPhD]

Brian addressed your question on Ag PhD Radio: soundcloud.com/agphd/10-21-19-boron#t=57:48

[@vladimirceman5446]

When I apply large amount (25 tons/acre) of composted manure in fall, is there available phosphorus in early spring, or do I have to wait 60-65 degrees temperature for microbials to start working on phosphorus availability?

[@AgPhD]

Brian and Darren addressed your question on Ag PhD Radio: soundcloud.com/agphd/02-22-21-phosphorus#t=52:56

[@brendafosmire6519]

I’m surprised that you’ve not yet discovered no-till and the benefits of soil versus dirt. You should read Soil to Dirt but Gabe Brown. Great book. After reading Soil to Dirt I now look at till fields with no cover crop as a dead zone. The game is not about yield, but is about profit. Less chemicals equals thriving soil and lower cost resulting in greater profit per acre.

[@brianjonker510]

rarely does it work like that

[@centrallandproducer7977]

Nice information! Can I ask you a quick question please? I downloaded your app and got the nutrition estimates for my yield goal. But I still have got some confusion. The estimates given by the app, are they expressed in terms of acre? In my country we use hectares, so how can I convert them?

[@AgPhD]

Darren addressed your question on Ag PhD Radio: soundcloud.com/agphd/02-11-22-farmer-friday?si=2f861b0217544bcb8774da7db2c3d4af&#t=16:59

[@BlackWhite-xk7fb]

Great video

[@jahmelralph2306]

Nice info guys.... When you talking phosphorus in form are you talking ?

[@AgPhD]

Brian and Darren answered your question recently on Ag PhD Radio: soundcloud.com/agphd/11-27-18-insecticides#t=52:10