Fig. 3. Effect of treatment type on the fraction of applied P released as water-extractable phosphorus (WEP), termed as percent WEP released. M-L, manure with low P application rate; M-H, manure with high P application rate; ATM-L, Al-treated manure with low P application rate; ATM-H, Al-treated manure with high P application rate; ITM-L, Fe-treated manure with low P application rate; ITM-H, Fe-treated manure with high P application rate; LTM-L, Ca-treated manure with low P application rate; LTM-H, Ca-treated manure with high P application rate.