Organic nitrogen efficiency by material, soil texture and distribution (DPI)

Returns the fraction of total organic N that is available to the crop in the year of application, according to DPI (tipo di effluente, tessitura, modalita di distribuzione). Used when soil_group and distribution_efficiency are passed to organic_fertilization().

Usage

organic_N_efficiency(source, soil_group, distribution_efficiency)

Arguments

source: Character. Organic fertilizer source (e.g. "Cattle slurry").
soil_group: Character. Soil group from calc_soil_group_and_id_rag() (e.g. "Sandy textures", "Franco", "Clayey") or DPI class: "sabbioso", "franco", "argilloso".
distribution_efficiency: Character. "efficient" (Alta), "medium" (Media), or "low" (Bassa). Alta = iniezione, fertirrigazione, interramento entro 4 h; Media = rasoterra con interramento; Bassa = spandimento superficiale senza incorporazione.

Value

Numeric. Efficiency as a fraction between 0 and 1, or NA if not found. For ammendanti (compost, letame maturo, digestato palabile) returns 0.40 (40%).

References

DPI Emilia-Romagna, Guida alla fertilizzazione; FertDPI foglio Efficienza. Terreno sabbioso/franco/argilloso x distribuzione efficiente/media/poco efficiente.

Examples

organic_N_efficiency("Cattle slurry", "Sandy textures", "efficient")
#> [1] 0.671
organic_N_efficiency("Composted manure", "Franco", "medium")  # 0.40
#> [1] 0.4