Establishment of Native Grasses with Biosolids on Abandoned Croplands in Chihuahua, Mexico

Figure 3

Grass height under different biosolids rates, methods of application (BioInc: soil-incorporated method; BioSur:  surface-applied method), and dates (year 2006, 2007, or 2008) at a seeded abandoned field in Chihuahua, Mexico. 𝑌_BioInc2006=nolinear (𝑃=0.1320) or quadratic effect (𝑃=0.2348), 𝑛=8; 𝑌_BioInc2007=8.33+5.00𝑥−0.14𝑥², 𝑃=0.0001, 𝑟²=0.92, 𝑛=8; 𝑌_BioInc2008=16.04+6.76𝑥−0.163𝑥², 𝑃=0.0139, 𝑟²=0.84, 𝑛=8. 𝑌_BioSur2006=54.43+6.15𝑥−0.17𝑥², 𝑃=0.96, 𝑟²=0.96, 𝑛=8; 𝑌_BioSur2007=11.84+3.95𝑥−0.11𝑥², 𝑃=0.0003, 𝑟²=0.75, 𝑛=8; 𝑌_BioSur2008=15.47+10.51𝑥−0.30𝑥², 𝑃=0.0001, 𝑟²=0.93, 𝑛=8.