9 Apr 2008 by EDS
Just had back my first ever soil analysis and could do with some help please regarding a fertlizer programme to get the levels right for the square (rye grass).
How long should I follow such a programme before further analysis?
pH : 7.83 Sand : 60 % Silt : 19 % Clay : 21 %
CEC : 26.8 (meq/100g)
Index mg/l
P 1 13.8
K 1 90
Mg 2 57
Ca 3950
Thanks
Still Learning
9 Apr 2008 by IGS
Can you clarify the results:
Phosphorus 113.8 mg/l or 13.8 mg/l
Potassium 190 mg/l or 90 mg/l
Magnesium 257 mg/l or 57 mg/l
Calcium 3950 mg/l
Soil texture sandy silt loam
assumed ot be a cricket loam / heavy soil sports pitch?
IGS
IGS,
I would guess that Des's results are, P 13.8 Scale 1 Low
K 90 " 1 Low
Mg 57 " 2 Fair
Ca 950 " 3 Good
I will leave you to work out an annual feed programme. I'm not clever enough.
9 Apr 2008 by IGS
I would have thought the the Ca++ is 3950 ppm in consideration of the CEC value
what do you think?
9 Apr 2008 by IGS Last edited 9 Apr 2008
Des,
Just figured out the results
the 1 is the ADAS INDEX followed by mg/l (ppm).
Good old RB 201
________________________________________
Hey Bath
many thanks for that - I am too, not clever enough to work out a fertiliser programme based on the information provided at this time.
_______________________________________
Des,
to understand in more depth the science of your rootzone additional elements will need to be know.
Can you obtain analysis of:
Sodium & Aluminium to get CEC %'s
Micro elements: Mn, Zn, Fe, Cu, B, Mo,
Organic Matter
Due to the high pH Phosphorus availability will be limited and the exchangeable ppm (mg/l) is slightly low.
Depending upon contents:- Manganese, Copper, Zinc and Boron may also be limited at this pH
From the data provided, the CEC %'s are
Element -- CEC% Target
Calcium -- 96.55 -- 60 - 75%
Magnesium -- 2.32 -- 10 - 20%
Potassium -- 1.13 -- 0.7 - 1.3%
Aluminium -- 0.00 -- 5.00%
Hydrogen -- 0.00 -- <20%
Sodium -- 0.00 -- <5%
Other -- 0.00 -- <3%
The rootzone would benefit by having a lower pH. Elemental sulphur will dissipate some Ca++ with Mg++ and K+ increased to achieve the target % and ppm contents of
Ca - 1600 - 2000
Mg - 180 - 200
K - 180 - 240
The above figures are estimates until further information is available. pH can be moved nearer to 7.0 by balancing the cations.
Do not use carbonate products - sulphate based materials will not create a further increases in pH.
Aim to move the milliequivalents values of calcium to magnesium ratio (Ca : Mg) towards a 1 : 1 for a tighter wicket with greater pace if required.
Back to your original question regarding fertiliser application, initially apply
Phosphorus 29.78 Kg / Ha P2O5
Potassium 132.55 Kg / Ha K2O
Magnesium 237.09 Kg / Ha MgO
to address the cations. Best applied at renovation time to get into the rootzone.
Nitrogen content is not known. Any organic debris can be digested with a little help in the closed season.
Ammonium sulphate will also help to lower pH
Do not over do the Iron (Fe++) application as this just locks up with calcium and makes the whole lot harder to dissipate and besides Fe levels are probably through the roof in any case.
Little and often is the way no big hits and monitor
Hope this is useful...
9 Apr 2008 by IGS Last edited 9 Apr 2008
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9 Apr 2008 by EDS
IGS
Thanks for assistance... I could PM you, if that's ok, the analysis I got back?
Still Learning
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