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Estimate end-of-cycle soil K2O content (ppm)

Source: R/end_of_cycle_soil.R
estimate_soil_K_end_of_cycle.Rd

Simplified relationship:


  K2O_end_ppm = K2O_start_ppm + (K2O_applied - K2O_removed - K2O_leaching) / (soil_weight_30cm/1000)

The lisciviazione (H) is taken from K_leaching_by_clay(clay_pct).

Usage

estimate_soil_K_end_of_cycle(
  K2O_start_ppm,
  K2O_applied,
  K2O_removed,
  clay_pct,
  soil_group,
  depth_cm = 30,
  texture_groups.table = NFert::texture_groups.table
)

Arguments

K2O_start_ppm

Initial exchangeable K2O ppm.

K2O_applied, K2O_removed

kg K2O/ha applied / removed.

clay_pct

Clay percentage for H leaching.

soil_group

DPI texture group.

depth_cm

Default 30 cm.

texture_groups.table

Lookup.

Value

Numeric ppm K2O at end of cycle.

Examples

estimate_soil_K_end_of_cycle(K2O_start_ppm = 150, K2O_applied = 230,
                             K2O_removed = 119.4, clay_pct = 18.5,
                             soil_group = "Medio impasto")
#> [1] 173.2308