Century: This function implements the Century model from Parton.
In BioCro: Simulation of Biomass Crops

Description Usage Arguments Details Value Author(s) References Examples

Calculates flows of soil organic carbon and nitrogen based on the Century model. There are two versions one written in R (Century) and one in C (CenturyC). The C version only runs at weekly timesteps.

Century(LeafL, StemL, RootL, RhizL, smoist, stemp, precip, leachWater,
centuryControl = list(), soilType=5, verbose = FALSE)

CenturyC(LeafL, StemL, RootL, RhizL, smoist, stemp, precip, 
    leachWater, centuryControl = list(), soilType = 5) 

somc(om = 2, cc = 0.5, depth = 0.3, bd=1.3, pp=c(0.01,0.19,0.8))
isom(SC6=0.39, SC7=7.41, SC8=31.2, cc=0.5, depth=0.3, bd=1.3)

`LeafL`	Leaf litter.
`StemL`	Stem litter.
`RootL`	Root litter.
`RhizL`	Rhizome litter.
`smoist`	Soil moisture (0-1).
`stemp`	Soil temperature (Celsius).
`precip`	Precipitation (mm).
`leachWater`	Leached water.
`centuryControl`	See `centuryParms`.
`verbose`	Only used in the R version for debugging.
`soilType`	See `showSoilType`.

function somc

`om`	organic matter (percent)
`cc`	carbon content (proportion 0-1) of the om
`depth`	soil depth (meters)
`bd`	bulk density (g/cm3)
`pp`	partition proportion, the firts one is the proportion of the soil organic carbon in microbes, second in slow and third in passive.

function isom

Some arguments are the same as somc

`SC6`	microbial biomass (Mg/ha)
`SC7`	slow pool (Mg/ha)
`SC8`	passive pool (Mg/ha)

Most of the details can be found in the papers by Parton et al. (1987, 1988, 1993)

Function somc can used to set the values of the main soil organic carbon pools. For an application the model would need to be spined (run for a long time).

Function isom is for doing the inverse conversion that somc does.

At this point the R version and the C version will differ slightly. TODO is to fix this. At least part of the reason is that the texture is different.

A list with,