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Soil Properties as Influenced by Phosphorus- and Nitrogen-Based Manure and Compost Applications

USDA-ARS, Dep. of Agron. and Hortic., Univ. of Nebraska-Lincoln, Lincoln, NE 68583

View larger version (38K): [in a new window]   Fig. 1. Surface soil (0–15 cm) total carbon concentration for 10 treatments in 4 yr. The vertical bars are standard errors, CN is compost for N, CP is compost for P, MN is manure for N, MP is manure for P, FR is inorganic fertilizer, CK is check, and 2Y is biennial application.

View larger version (52K): [in a new window]   Fig. 2. Surface soil (0–15 cm) total N concentration for 10 treatments in 4 yr. The vertical bars are standard errors, CN is compost for N, CP is compost for P, MN is manure for N, MP is manure for P, FR is inorganic fertilizer, CK is check, and 2Y is biennial application.

View larger version (49K): [in a new window]   Fig. 3. Surface soil (0–15 cm) pH for 10 treatments in 4 yr. The vertical bars are standard errors, CN is compost for N, CP is compost for P, MN is manure for N, MP is manure for P, FR is inorganic fertilizer, CK is check, and 2Y is biennial application.

View larger version (47K): [in a new window]   Fig. 4. Surface soil (0–15 cm) electrical conductivity for 10 treatments in 4 yr. The vertical bars are standard errors, CN is compost for N, CP is compost for P, MN is manure for N, MP is manure for P, FR is inorganic fertilizer, CK is check, and 2Y is biennial application.

View larger version (37K): [in a new window]   Fig. 5. Soil nitrate-N concentration to a depth of 1.2 m for 10 treatments in 4 yr. CN is compost for N, CP is compost for P, MN is manure for N, MP is manure for P, FR is inorganic fertilizer, CK is check, and 2Y is biennial application.

View larger version (34K): [in a new window]   Fig. 6. Soil nitrate-N quantity to a depth of 1.2 m for 10 treatments in 4 yr. The vertical bars are standard errors, CN is compost for N, CP is compost for P, MN is manure for N, MP is manure for P, FR is inorganic fertilizer, CK is check, and 2Y is biennial application.