Fall-applied manure can conserve excess soil-profile inorganic-N for the subsequent cropping year.

ABSTRACT: To investigate dairy manure urea fertilizer interactions in cropped soils of the semiarid-West, we fall-applied and incorporated (0-0.3 m) soil urea-N (FertN) rates of 10 (N0), 45 (N1), and 80 mg N kg^-1 (N2), co-applied with either no manure or 86 Mg ha^-1 (dry wt.) stockpiled dairy manure. Soil net N mineralization, inorganic N (InorgN*), and water extractable organic carbon (WEOC*) to a 1.2-m depth, and silage corn yield and N uptake measurements were used to derive a simple mobile (soluble) N soil budget. The InorgN's descending-pulse, soil leaching profile contrasted with WEOC's adsorption and complexation profile, in which 95% of the manure-sourced WEOC accumulated in the 0- to 0.6-m soil layer by summer's end. At the outset, treatments influenced InorgN loading o

SUBMITTER: Lentz RD 

PROVIDER: S-EPMC12431947 | biostudies-literature | 2025 Sep-Oct

REPOSITORIES: biostudies-literature