Skip to contents

Calculate soil fertility parameters (B = B1 + B2 in DPI).

Source: R/calc_soil_N_available.R
soil_fertility.Rd

Estimates readily available and mineralized nitrogen in the soil. DPI naming: b1 = readily available N from soil total N (DPI B2); b2 = mineralized N from SOM (DPI B1). Total B = b1 + b2.

Usage

soil_fertility(
  Ntot = 1.2,
  SOM = 2,
  soil.group = "Sandy textures",
  CN = 8,
  ccp = "Autumn-winter crop <150 days",
  soil_seeding = c("traditional", "no-till"),
  coefN_readily = NFert::coefN_readily,
  coefN_mineralised = NFert::coefN_mineralised,
  coef_time = NFert::coef_time
)

Arguments

Ntot

Total nitrogen content in the soil (e.g. g/kg or per mille).

SOM

Soil organic matter content (%).

soil.group

Soil group (e.g., "Sandy textures").

CN

Carbon-to-nitrogen ratio.

ccp

Crop category and planting period (e.g., "Autumn-winter crop <150 days").

soil_seeding

Seeding mode, one of "traditional" (default) or "no-till". DPI 2026 applies a detrazione of 3 kg N/ha on b1 (readily available N, "N pronto") for semina su sodo, because tillage-driven mineralisation is absent. See foglio B, cella Detrazione per semina su sodo = 3 in Fert_Office v1.26.

coefN_readily, coefN_mineralised, coef_time

Lookup tables.

Value

A named list containing:

  • b1: Readily available nitrogen (kg/ha), DPI B2.

  • b2: Mineralized nitrogen from SOM (kg/ha), DPI B1.

  • units: The units of the output values ("kg/ha").