Agricultural Soil Analysis PDF Print E-mail

Ridged soilSoil analysis provides a measure of the quantity of nutrients available to the crop.

Soil is analysed for its content of available Phosphorus (P), Potassium (K), Magnesium (Mg), pH (Lime) and trace elements. In addition to the above a glasshouse soil can be analysed for NO3 and E.C.

The analytical results will only be meaningful if an adequate and representative soil sample is taken, please read the sampling notes below carefully.

Agricultural Soil Sampling

All samples must be accompanied by an appropriate field form to facilitate prompt and efficient processing.

Preferred soil sample weight
1.0 Kg
Minimum soil sample weight0.5 Kg




Analysis available - All prices are exclusive of VAT

Loam (pH, P, K, Mg)
Glasshouse (pH, P, K, Mg, NO3 and  E.C.)£11.75
Trace elements -  
 Mn, Ca, Na, Zn, Fe, Cu - per element£6.50
 B, S - per element£7.50
 Mo - per element£9.50
Mechanical Analysis (Soil type )£32.00
Soil Texture (Hand) £4.00
Organic Content (loss on ignition) £6.75 
Dry Matter/Moisture £7.25
Mineral Nitrogen (in soil)£13.50 
Total Nitrogen (Organic content)£11.25










PDF Download Click here to Download Field Form

Please note: Field Forms are in Adobe Acrobat PDF format. Click here to download the free Adobe Acrobat reader if it is not already installed on your PC.

Guidelines for LOAM sampling

Loam sampling is carried out throughout the year. Fields larger than 10 ha (25ac) need to be split and more than one sample taken.

Fields should also be split into separate sampling units if the :-

  • Area has been split cropped in the past
  • Soil types vary significantly
  • Area was recently several small fields
  • Area incorporates old cottage gardens or allotments, etc
  • A poor patch was identified and mapped in the last crop

Remove any surface plant debris prior to sampling. Avoid sampling within three months of fertilser application or twelve months of lime application. Take care to avoid areas where previously there have been manure heaps, feeding rings, water bowsers, areas where animals congregated or within the proximity of trees. If it is felt necessary sample these separately.

Sample at regular intervals, walking in an extended ‘W’ pattern across the whole sampling unit area. Adjust the angle of the ‘W’ to suit the shape of the field.

At least 25 cores are needed however small the area to be sampled.

Sample with a narrow diameter corer to a depth of approx. 15 cm (6inch). On stubble, sample to plough depth for maximum accuracy. Put all the cores from one sample area into a polythene bag and secure it to prevent cross contamination from other samples. Each sample bag of soil should weigh a minimum of 0.5kg and ideally about 1kg. Too large a sample requires sub sampling in the laboratory for analytical analysis which can then introduce an unnecessary error especially on wet heavy sample.

Web LinksInternet Links

The following websites provide information about soil:

Disclaimer: ASA provide links to external websites on an "as is" basis and cannot be held responsible for changes in content or validity of information supplied.



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