Magnesium locking up potash?

marco

Member

Location

tipperary, ireland

• Aug 10, 2021

• #21

I'll put it this way, afew years ago I got the whole farm Albrecht tested. I made no mention of which fields we had grass tetney problems in. The results came back and they had highlighted two fields we had problems with cows getting tetney and sheep regularly going on their backs. K was higher than mg on a % basis on both fields.

Albrecht/Kinsey identified the fields, the problems and the solutions. Yes the testing may be expensive buy the loss of one cow will pay for alot of samples.

 

1594mac

Member

Location

Northern Ireland

• Aug 28, 2021

• #22

Jumping in here so apologies so what to do. Soil test results for silage ground are
PH 6.1
N 19
K 42
Magnesium 101

Advice given is apply 16 units of P per acre/ 48units of k per acre. So simple question is what should I use, no access to FYM/slurry at this time.

Suggestions please.

 

ollie989898

Member

Location

Hanging from a twig, in a deep sleep.

• Aug 29, 2021

• #23

1594mac said:

Jumping in here so apologies so what to do. Soil test results for silage ground are
PH 6.1
N 19
K 42
Magnesium 101

Advice given is apply 16 units of P per acre/ 48units of k per acre. So simple question is what should I use, no access to FYM/slurry at this time.

Suggestions please.

Click to expand...

Depends on the area involved. For phosphate you could just use bagged TSP. For Potash you could just use MOP. However there is a school of thought that applying nutrients in this way is harder on soil life than using manures or slurries.

It would be kinder to use a product like fibrophos or P grow but again you need a sensible area of land involved to make it worthwhile buying in truckloads of the stuff.

 

1594mac

Member

Location

Northern Ireland

• Aug 30, 2021

• #24

I think its going to be MOP then don't need truck loads hopefully

 

1594mac

Member

Location

Northern Ireland

• Sep 4, 2021

• #25

So its time for the next stupid question of the day as above the potash is 60kg/hectare so would I be close saying 25kg/acre? Now it also says 48 units/acre with the MOP being 0-0-60 how do you work that out as I thought the 60 units per kg or am I totally thick.

 

jack6480

Member

Location

Staffs

• Sep 4, 2021

• #26

How much is MOP a ton,

 

1594mac

Member

Location

Northern Ireland

• Sep 4, 2021

• #27

Dont know yet

 

C

clemmo

Member

• Sep 4, 2021

• #28

1594mac said:

So its time for the next stupid question of the day as above the potash is 60kg/hectare so would I be close saying 25kg/acre? Now it also says 48 units/acre with the MOP being 0-0-60 how do you work that out as I thought the 60 units per kg or am I totally thick.

Click to expand...

if you want to apply 60kg/ha of K that will be 100kg/ha of MOP ( 40kg /acre)

 

1594mac

Member

Location

Northern Ireland

• Sep 5, 2021

• #29

Morning thanks for that but is there away of working this out?? I was reading also about the high magnesium causing the potash being locked up and my result indicates high magnesium. Further reading within the forum talks about the use of gypsum would spent mushroom compost be of benefit? This has come about as first cut wasn't bad at all however second cut was poor and I had noted yellowing to some of the grass.

 

jack6480

Member

Location

Staffs

• Sep 5, 2021

• #30

Get some gypsum on and put K on.

 

Bob

Member

Location

Co Durham

• Sep 5, 2021

• #31

Renaultman said:

Also look at high calcium ferts like Kalfos.
Kalfos and gypsum are bringing my mg levels down.

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Who supplies and spreads Kalfos in the Durham area?

 

Renaultman

Member

Arable Farmer

Location

Darlington

• Sep 5, 2021

• #32

Bob said:

Who supplies and spreads Kalfos in the Durham area?

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