Soil process indices

Ec25Correction: EC referred to 25 C. CesiumRedistribution: caesium-137 proportional and profile models. IpccSoilCarbon: IPCC Tier 1 stock and change. RweqWindErosion: Revised Wind Erosion Equation. Identical to the Python arm morie.fn.soilext.

Usage

Ec25Correction(ec, temperature, method = "exponential")

CesiumRedistribution(
  inventory,
  reference,
  depth,
  bulk_density,
  years,
  p = 1,
  model = "proportional",
  h = 0
)

IpccSoilCarbon(
  soc_ref,
  f_lu,
  f_mg,
  f_i,
  area = 1,
  soc_initial = NULL,
  years = 20
)

RweqWindErosion(
  wf,
  ef,
  scf,
  k_prime,
  cog,
  field_length = NULL,
  sand = NULL,
  silt = NULL,
  clay = NULL,
  om = NULL,
  caco3 = NULL
)

Arguments

ec

Conductivity at temperature T.

temperature

Temperature (C).

method

"exponential" or "linear".

inventory, reference

Caesium-137 inventory and reference inventory.

depth

Plough depth (m).

bulk_density

Bulk density (kg per cubic m).

years

Years since 1963 (or the IPCC transition time).

p

Particle-size correction.

model

"proportional" or "profile".

h

Relaxation mass depth.

soc_ref

Reference stock (t C per ha).

f_lu, f_mg, f_i

Land-use, management and input factors.

area

Area (ha).

soc_initial

Initial stock.

wf, ef, scf, k_prime, cog

RWEQ factors (ef, scf may be NULL).

field_length

Field length (m).

sand, silt, clay, om, caco3

Soil properties (percent).

Value

A number, vector or list.

References

Sheets, K. R. and Hendrickx, J. M. H. (1995). Water Resources Research 31, 2401-2409.

Walling, D. E. and He, Q. (1999). Journal of Environmental Quality 28, 611-622.

Fryrear, D. W. et al. (1998). Revised Wind Erosion Equation (RWEQ). USDA-ARS Technical Bulletin 1.

Examples

Ec25Correction(1.2, 15)
#> [1] 1.49895
CesiumRedistribution(1800, 2400, 0.2, 1300, 50)
#> [1] -13