Testing Wisconsin P index assessments across cropping systems.

ABSTRACT: Managing agricultural runoff phosphorus (P) often requires understanding management effects on both dissolved P (DP) and particulate (sediment-bound) P (PP). The Wisconsin P index (WPI) allows producers to assess land management effects on runoff P by estimating annual P losses in mass per unit area. We used monitoring data to test the WPI's ability to identify P loss tradeoffs between tilled corn silage and perennial forage cropping systems and WPI's sensitivity to treatment differences within each cropping system. Overall, WPI P loss estimates were supported by monitoring results, with higher total P losses for the corn system dominated by PP (84%) and smaller losses from the perennial forage system dominated by DP (86%). Notably, the WPI also distinguished most treatment differences wit

SUBMITTER: Good L 

PROVIDER: S-EPMC12431964 | biostudies-literature | 2025 Sep-Oct

REPOSITORIES: biostudies-literature