Choose organic manures over artificial
Step 4 – Use organic fertilisers as efficiently as possible
Organic manures are a valuable source of N, P and K and can effectively replace artificial fertilisers.
To maximise the nutrients in organic manures, it is essential that they are applied at the correct time of the year.
The nutrient content of cattle slurry at different dry matter contents are shown in Table 3.
Therefore, good management at the time of application such as well agitated slurry with even and accurate application will improve the fertiliser value.
Remember to adjust slurry application rates depending on slurry dry matter to deliver the correct levels of P and K to meet crop nutrient requirements.
Applying organic manures to the same field year after year without knowing the soil fertility status may not be the best use of these valuable nutrients.
Consult soil test results and identify fields on the farm with the lowest fertility (Index 1).