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To spread all the P this fall or split with planter next spring?
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Hay Wilson in TX
Posted 8/11/2013 15:53 (#3261224 - in reply to #3261192)
Subject: Re: To spread all the P this fall or split with planter next spring?



Little River, TX

Jay in WA - 8/11/2013 14:21

blaze88 - 8/11/2013 11:53

If you don't put your p into the ground it will do no good in notill because your roots will not get it sitting on the surface. The p is not mobile in the soil at all so wherever you put it, that's where it will stay.


So how do the hay growers fertilize then? I am not buying the claims that P will never move into the soil. If it were me though I would put all the P on with the planter. More bang for the buck by banding next to the row. 2x2 would be my preferred method.


Very good Jay! 
If you had the same soils Oklahoma was referring to, you could dump 6 years worth of phosphate on the ground and have more total yield. 
Here in calcareous soil the P starts being tied up as a Rock Phosphate before you leave the field.  I suspect a good bit of the phosphate we put our in 1953 is still there in some form of calcium phosphate.
Note rock phosphate is close to unavailable as a rock phosphate in 8 pH soils.


Everything is top dressed for the grass hay fields in East Texas. 
Here we are ok spreading on the top potash, but phosphate is better if banded.

Note banding or strip application fairly well makes a mockery soil analysis. That is why I use plant analysis almost exclusively.   

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