carbonsoil.model: The CarbonSoil model - calculate daily values over designated...

In ZeBook: Working with Dynamic Models for Agriculture and Environment

Description

Simple dynamic model of soil carbon content, with a time step of one year. The equations that describe the dynamics of this system are adapted from the Henin-Dupuis model described in Jones et al. (2004). The soil carbon content is represented by a single state variable: the mass of carbon per unit land area in the top 20 cm of soil in a given year (Z, kg.ha-1). It is assumed that soil C is known in some year, taken as the initial year. The yearly change in soil C is the difference between input from crop biomass and loss.

Usage

carbonsoil.model(R, b, U, Z1, duration)

Arguments

R	: the fraction of soil carbon content lost per year
b	: the fraction of yearly crop biomass production left in the soil
U	: the amount of C in crop biomass production (constant or time series)
Z1	: initial soil carbon content
duration	: duration of simulation (year))

Value

Soil carbon years.

ZeBook documentation built on May 1, 2019, 9:48 p.m.