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As a guideline, take one sample to represent 2 ha. If the area is not uniform, reduce the area represented by one sample. If the area is very uniform, a sample may be taken to represent 4 ha. |
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Map out discrete areas of the farm that are uniform in soil type, slope, drainage and cropping history. |
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Take a composite sample of 20 cores in each designated area. |
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Cores should be taken to a depth of 10cm (4"). |
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Cores should be taken in a "W" pattern across the sampling area. |
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Avoid unusual spots like old fences, ditches, feeding areas and gateways. |
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Avoid dung and urine patches, and areas where fertilisers were stored or spilled. |
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Do not sample for P (Phosphorus) or K (Potassium) for 4-6 months after last fertiliser application. Sample at the same time of year on each occasion. |
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Sample every 3 years on intensive farms. |
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Sample every 4-5 years on extensive farms. |
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Fill in identification form completely. |
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Enter Map Grid Number or the land parcel number for each sample on the soil form. |
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Include full information for crops, paying particular attention to stocking rates. |
