SOIL ANALYSIS
incremental levels these can be used as part of a progressive management system to help monitor cultural practice to control thatch levels.
Organic Matter for soils containing high amounts of Organic Matter
Organic Matter analysis undertaken via titration conforms to the Walkley Black - wet combustion method suited to soils which naturally contain high levels of organic matter such as chalk and peat soils. This test should be selected if the fertiliser programme that you are using utilises high proportions of microbes as these form a significant constituent part of the organic matter and should be discounted from organic matter readings if you are monitoring thatch levels.
Full Cation Exchange Capacity (CEC)
A full CEC and exchangeable cations analysis is a different analysis to the single figure that is available on most industry analyses: it incorporates significantly more detail including the exchangeable anions. It is a full chemical extracting method,
compared to a calculated method undertaken generally.
Textural Classification
A textural classification analysis utilises laser diffraction to apportion a percentage figure to different soil fractions at considerably greater detail than the three common particles already mentioned. This technology facilitates a cost-effective test that can provide valuable management data. However this method is not best suited to high clay or high organic matter soil types.
Textural Size Distribution (PSD)
Textural Size Distribution (PSD) - utilising Sieves and sedimentation provides the most accurate, tried and tested way of obtaining valuable information.
Water
The water analysis reports on conductivity, plus values for dissolved Ammonium (NH4+), Boron (Bo), Calcium (Ca), Chlorine (Cl), Copper (Cu), Iron (Fe), Magnesium (Mg), Manganese (Mn), Nitrate (NO3-), Phosphate (P), Potassium (K), Sodium (Na), Sulphur (S), Zinc (Zn), pH and Potassium to Calcium, Potassium to Magnesium and Potassium to Nitrogen ratios.
Plant Tissue
A plant tissue analysis is usually used as a diagnostic tool for future correction of nutrient problems; plant tissue analysis from young plants may allow a corrective fertiliser application that same
season. This analysis will provide values for the following elements: Nitrogen (N), Phosphate (P), Potassium (K), Sodium (Na), Calcium (Ca), Magnesium (Mg), Manganese (Mn), Iron (Fe), Copper (Cu), Zinc (Zn), Boron (Bo), Sulphur (S) and a Dry Matter value.
SAMPLING INSTRUCTIONS FOR SOIL, WATER AND LEAF TISSUE ANALYSIS Soil Analysis
The accuracy of any analysis depends upon the data that is gathered. The following guidance will help you obtain the best from the data that you gather.
• The sample needs to be representative of the area as a whole
• Sample with clean tools i.e. soil auger, sampler or trowel
• Clearly label the samples
• Do not sample immediately after fertiliser or pesticide applications
• Dispatch material off promptly
Areas should be sampled representatively. The diagrams show sampling paths
that optimise the amount of data provided. Water Analysis
Run the water for three minutes to ensure that the line is clear and the water is fresh. Fill a 250ml sterile sample bottle. Label the sample and post it as soon as it is convenient.
Tissue analysis
Fill the sample bag with fresh clippings from a representative area, label and post the sample off as soon as possible. If the sample cannot be immediately posted off, thoroughly air-dry the material over a moderate heater and post when convenient.
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