P index value | P loss risk | General interpretation and recommendations |
<33 | Low | Low potential for P loss. If current farming practices are maintain, there is a low risk of adverse impacts on surface waters. |
33 to 65 | Medium | Moderate potential for P loss. The chance for adverse impacts on surface waters exists, and remediation measures should be introduce to minimise P loss. Use of the P index to identify specific field areas that could represent long-term concerns and the implementation of BMPs are to be consider in those areas. |
66 to 100 | High | High potential for P loss and adverse impact on surface waters. To determine using the P index if one factor is disproportionally affecting risk of P losses. Inclusion of an appropriate BMP and/or reducing P application to bring P loss risk to medium (<65) is warranted. A conservation P management plan is required with the long-term goal of shifting the P loss risk to the medium or lower category. |
>100 | Very High | Very high potential for P loss and adverse impact on surface waters. The adoption of BMPs to decrease this value below the very high category in the short term and a conservation management plan that would reduce the P loss risk to a lower risk category, with the long-term goal of having a P index in the medium or lower category. |