Figure 5 | Scientific Reports

Figure 5

From: Long-term application of fertilizer and manures affect P fractions in Mollisol

Figure 5

Effect of long-term application of chemical fertilizer, organic manure and straw on the distribution of inorganic P fractions. * indicates significant difference at P < 0.05 level at the same soil depth, ns indicates no significant difference regarding the Ca2-P, Ca8-P, Al-P, Fe-P, O-P and Ca10-P concentrations at the same soil depth. CK, no fertilizer application; NPK, chemical fertilizer application; NPK + S, chemical fertilizer plus maize straw incorporation; OM, organic manure application.

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