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Potassium balance (DPI Emilia-Romagna 2026 metodo del bilancio)

Source: R/K_balance.R
K_balance.Rd

Implements the K2O balance of Fert_Office v1.26 foglio Bilancio / Gri_K.

Usage

K_balance(
  expected_yield_tons_ha,
  crop,
  k_value,
  k_unit = c("K", "K2O"),
  soil_group = NULL,
  clay = NULL,
  sand = NULL,
  advance_K2O = 0,
  include_leaching = TRUE
)

Arguments

expected_yield_tons_ha

Expected yield (t/ha).

crop

Crop name (matches uptake_table$crop).

k_value

Analytical K (or K2O) ppm.

k_unit

"K" or "K2O", default "K".

soil_group

DPI texture group; if NULL and clay/sand given, derived.

clay, sand

Soil clay/sand percentages (%).

advance_K2O

Advance anni futuri (default 0).

include_leaching

Logical, use clay-based H leaching (default TRUE).

Value

A data frame with A, H, B1, A2, B2, strategy, ID_Gri_K, K2O_required.

Details

Formula:


  K2O da apportare = A (asportazione) + H (lisciviazione clay-based) + B1 (arricchimento)
                     + A2 (advance_allowed) - B2 (riduzione)

with A set to 0 in "Riduzione" strategy.

Examples

K_balance(expected_yield_tons_ha = 6,
          crop = "Grano duro (pianta intera)",
          k_value = 150, k_unit = "K2O",
          clay = 18.5, sand = 15.5)
#>       A A_fabbisogno  H B1 A2 B2     strategy ID_Gri_K K2O_required
#> 1 119.4        119.4 20  0  0  0 Mantenimento        3        139.4