org.agmip.functions

Class SoilHelper

java.lang.Object

org.agmip.functions.SoilHelper

public class SoilHelper
extends Object

Provide static functions for soil data handling

Author:

Meng Zhang

Constructor Summary

Constructors

Constructor and Description
SoilHelper()

Method Summary

Methods

Modifier and Type	Method and Description
protected static String	getGrowthFactor(String mid, String pp, String k, String m) soil factors which decline exponentially between PP and RD (units depend on variable, same units as M (Maximum value, will use default value 1)
static HashMap<String,ArrayList<String>>	getIcnDistribution(HashMap data, String icin) Given a total inorganic N amount for the soil profile, this function distributes the N over the soil layers assuming a constant concentration of NO3 (90%) and NH4 (10%)
static HashMap<String,ArrayList<String>>	getRootDistribution(HashMap data, String var, String m, String pp, String rd) Calculate root growth factor (0-1) for each soil layer
protected static ArrayList	getSoilLayer(HashMap data) Get soil layer data array from data holder.
static HashMap<String,ArrayList<String>>	getSoilValsFromOthPara(HashMap data, String calcMethod, ArrayList<String> calcVars) Calculate the soil layer variables based on other soil parameters.
static ArrayList<HashMap<String,String>>	splittingSoillayer(HashMap data, boolean isICLayer) Splitting the original soil layers into homogeneous layers with soil thicknesses which do not exceed limits of drainage models.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SoilHelper

public SoilHelper()

Method Detail

getRootDistribution

public static HashMap<String,ArrayList<String>> getRootDistribution(HashMap data,
                                                    String var,
                                                    String m,
                                                    String pp,
                                                    String rd)

Calculate root growth factor (0-1) for each soil layer

Parameters:

data - The data map

var - The variable name that will be used for storing the result

m - Maximum value in the top PP cm of soil (units depend on variable)

pp - depth of top of curve (pivot point) (cm)

rd - maximum rooting depth (cm), or depth at which the value is 2% of the maximum value

Returns:

An ArrayList of root distribution for each layer of given soil

getIcnDistribution

public static HashMap<String,ArrayList<String>> getIcnDistribution(HashMap data,
                                                   String icin)

Given a total inorganic N amount for the soil profile, this function distributes the N over the soil layers assuming a constant concentration of NO3 (90%) and NH4 (10%)

Parameters:

data - The data set

icin - Total soil N over the profile (kg[N]/ha)

Returns:

Three ArrayList Corresponded to ICN_TOT, ICNO3 ICNH4 for each layer of given soil

getGrowthFactor

protected static String getGrowthFactor(String mid,
                     String pp,
                     String k,
                     String m)

soil factors which decline exponentially between PP and RD (units depend on variable, same units as M (Maximum value, will use default value 1)

Parameters:

mid - The mid point value between two layers

pp - depth of top soil, or pivot point of curve (cm)

k - exponential decay rate

m - Maximum value in the top PP cm of soil (units depend on

Returns:

The growth factor (0-m)

getSoilLayer

protected static ArrayList getSoilLayer(HashMap data)

Get soil layer data array from data holder.

Parameters:

data - The experiment data holder

Returns:

The soil layer data array

splittingSoillayer

public static ArrayList<HashMap<String,String>> splittingSoillayer(HashMap data,
                                                   boolean isICLayer)

Splitting the original soil layers into homogeneous layers with soil thicknesses which do not exceed limits of drainage models. The parameters for new layer will depend on the original layers.

Parameters:

data - The experiment data holder

Returns:

The soil layer data array with new added layers

getSoilValsFromOthPara

public static HashMap<String,ArrayList<String>> getSoilValsFromOthPara(HashMap data,
                                                       String calcMethod,
                                                       ArrayList<String> calcVars)

Calculate the soil layer variables based on other soil parameters. Currently following method is available for calculation: PTSaxton2006 - based on the soil texture and organic matter. More potential ways would be available in the future.

Parameters:

data - The data set

calcMethod - The name of calculation method

calcVars - The list of variables which will be applied with calculation

Returns:

The list for calculation results for each variable