Table 3: Biomass residue and field length effects on soluble P, -, and - in the 274 m long field. Shown are means (standard error), as well as analysis of variance results. .

Location (m)TreatmentSoluble P conc
(mg L−1)
Soluble P exp
(kg ha−1)
conc
(mg L−1)
exp
(kg ha−1)
conc
(mg L−1)
exp
(kg ha−1)

91Control0.06 (0.01)b0.14 (0.03)2.46 (0.20)c9.60 (1.36)b0.11 (0.03)b0.36 (0.06)
Low0.07 (0.02)b0.23 (0.10)3.27 (0.19)b10.07 (1.35)b0.18 (0.11)b0.48 (0.31)
Medium0.09 (0.03)b0.25 (0.06)3.70 (0.38)ab12.80 (2.40)b0.16 (0.09)b0.41 (0.18)
High0.20 (0.05)a0.35 (0.09)3.32 (0.31)a6.50 (0.86)a0.22 (0.10)a0.36 (0.15)

183Control0.08 (0.01)y0.06 (0.02)2.69 (0.21)z2.20 (0.10)y0.13 (0.02)y0.08 (0.03)
Low0.11 (0.03)y0.07 (0.02)3.73 (0.27)y2.60 (0.45)y0.21 (0.10)y0.09 (0.03)
Medium0.24 (0.11)y0.06 (0.01)4.62 (0.80)xy1.73 (0.56)y0.45 (0.25)y0.10 (0.02)
High0.74 (0.23)x0.07 (0.03)5.40 (0.34)x0.57 (0.19)x1.32 (0.50)x0.09 (0.04)

Analysis of variance

Biomass ** NS ** * * NS
Length * *** ** *** * **
Biomass × lenght * NSNSNS * NS

For each variable and length, values designated with the same letter are not significantly different.