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

Table 1

Soil chemical properties before biosolids application and biosolids composition from the North Wastewater Treatment Plant at Chihuahua city, Mexico.

Constituent^a	Soil	Biosolids	Element	Soil	Biosolids
pH	6.5	6.7	Ca (mg kg^−1)	850	3,412
OM (%)	0.55	12	Mg (mg kg^−1)	125	1,037
TCC (%)	Free	Free	Na (mg kg^−1)	237	1,312
EC (dS m^−1)	1.4	3	Cu (mg kg^−1)	1	9
N-NO3^− (mg kg^−1)	60	66	Fe (mg kg^−1)	4	30
P (mg kg^−1)	8	7	Mn (mg kg^−1)	14	15
K (mg kg^−1)	362	962	Zn (mg kg^−1)	3	111

aOM: organic matter; TCC: total calcium carbonate; EC: electrical conductivity; N-NO₃ and the rest of the elements are extractable and expressed on a dry weight basis.