Soil and tissue testing
Proper plant nutrition is fundamental to the successful growing of crops and pastures. Impact Fertilisers’ dealers can recommend appropriate fertilisers for any given situation. Soil and plant analysis is the first step. Your fertiliser dealer can supply this service or refer you to a range of testing services available from various laboratories.
Soil Tests FAQ
When should I soil sample?
Soil is best sampled when the soil is dry early enough to provide a worthwhile guide to any decisions regarding a fertiliser purchase.
What depth do I sample to?
Different states in Australia have varying sample depths that have been calibrated to soil test results. Please talk to your dealer / soil testing laboratory to ensure you are sampling at the correct depth. Samples taken from different depths will give misleading results due to factors of concentration or dilution.
How many samples do I take?
One sample per paddock or soil type that is composed of at least 20 to 30 sub-samples or cores.
How do I sample?
If you are monitoring long-term fertility trends it is best to select a representative part of the paddock and walk a line across, stopping at regular intervals to take sub-samples or cores. The line you take should be permanently and clearly marked so that you can take future samples from the same area. If you are trying to diagnose a particular problem you need to sample from the part of the paddock that is showing signs of the problem and then take another representative selection by sampling in a zigzag pattern in the non-problem area.
Tissue testing allow you to identify and monitor the level of trace elements in most crops.
- Samples should be taken early in the week and early on the day to ensure a fresh sample reaches the laboratory for analysis.
- Please consult your dealer to ensure the correct leaf age is sampled for accurate test results to be obtained.
- Tissue tests are far more accurate than soil tests for trace element status in the plant
Check crops early and regularly for:
- Plant density
- Nitrogen and trace element levels.