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Fertilization distribution plan

Source: R/fert_plan.R
plan_distribution.Rd

Builds the fertilisation distribution plan for a crop according to DPI Emilia-Romagna 2026 (Fert_Office v1.26 foglio Distribuz). Combines:

Usage

plan_distribution(
  soil_group,
  n_balance = NULL,
  p_balance = NULL,
  k_balance = NULL,
  organic_rows = list(),
  mineral_rows = list(),
  zvn = FALSE,
  organic_fertilizers.table = NFert::organic_fertilizers.table,
  mineral_fertilizers.table = NFert::mineral_fertilizers.table,
  efficiency.table = NFert::efficiency.table,
  distribution_modalities.table = NFert::distribution_modalities.table,
  texture_groups.table = NFert::texture_groups.table
)

Arguments

soil_group

Italian DPI texture group.

n_balance, p_balance, k_balance

Optional numeric requirements (kg/ha).

organic_rows

A list of lists, each with:

  • fertilizer: name matching organic_fertilizers.table$fertilizer (or a custom name plus explicit titres)

  • quantity_t_ha: amount in t/ha (fresh matter)

  • year: application year (e.g. 2024, 2025)

  • modality_epoch: ID or label from distribution_modalities.table

  • level (optional): efficiency level "bassa"/"media"/"alta" if you want to override the default selection.

  • Optional N_pct, P2O5_pct, K2O_pct, dry_matter_pct override the table.

mineral_rows

A list of lists, each with:

  • fertilizer: matching mineral_fertilizers.table$fertilizer, or custom

  • quantity_q_ha: quintals/ha (100 kg/ha)

  • modality_epoch: ID or label from distribution_modalities.table

  • N, P2O5, K2O titres (kg per q) if custom.

zvn

Logical, if TRUE, enforce the ZVN 170 kg N/ha zootec cap.

organic_fertilizers.table, mineral_fertilizers.table, efficiency.table, distribution_modalities.table, texture_groups.table

Defaults.

Value

A list with:

  • rows: per-application data frame (fertilizer, quantity, delivered N/P/K, efficiency, useful N/P/K)

  • totals: totals of useful N, P2O5, K2O delivered

  • alerts: if balances provided, OK/Eccesso/Deficit for each nutrient

  • zvn_zoot_N: total zootec N delivered (useful for ZVN check)

Details

  • Organic applications (one or more matrices from organic_fertilizers.table, with efficiency selected from efficiency.table by soil group, dose level, and sector of matrix).

  • Mineral / synthesis fertilisers (from mineral_fertilizers.table or user-specified triplets of N, P2O5, K2O titres).

For each input row the function computes the "useful" contribution to the crop for N (via efficiency), P2O5 and K2O (assumed 100%), and aggregates the totals. If n_balance, p_balance, k_balance are provided the function also checks the totals against the required doses and returns alerts (OK / Eccesso / Deficit).