Parameters

Description

Unit

Value

Code in PCRaster

Code in STELLA

Initialise soil fertility from external map?

Option to use spatial data on initial soil fertility condition from external existing maps.  If not, the data will be generated based on given statistic.

-

0 = No

1 = Yes

Default = 0

Average inherent soil fertility

Average of inherent soil fertility at initial condition for spatial data generation.

qualitative fertility scale

0 for not fertile (bad soil)

10 for fertile (good soil)

Default = 10

Inherent soil fertility range

Range of inherent soil fertility at initial condition for spatial data generation.

qualitative fertility

scale

Default = 10

Average half time of soil fertility recovery

Average of half time of soil fertility at initial condition for spatial data generation.

yrs

Default = 15

Half time of soil fertility recovery range

Range of inherent soil fertility at initial condition for spatial data generation.

yrs

Default = 0.3

Minimum value of initial relative fertility

Minimum value of relative fertility

qualitative fertility scale

Default = 0.70

Maximum value of initial relative fertility

Maximum value of relative fertility

qualitative fertility scale

Default = 0.95

Fertility depletion rate during cropping time

Depletion rate of soil fertility when a field is cultivated with crops

qualitative fertility scale per yr

Default = 0.20

Fertility depletion rate during planting time

Depletion rate of soil fertility when a field adopted monoculture plantation systems.

qualitative fertility scale per yr

Default = 0.30

Effect of fertilizer application on half time of recovery

Multiplier factor in soil fertility recovery process as effect of fertilizer application

-

Default = 2

Apply fertilizer during cropping?

Option to apply fertilizer during cropping.

-

0 = No

1 = Yes

Default = 0

Apply fertilizer during planting?

Option to apply fertilizer in monoculture plantation systems.

-

0 = No

1 = Yes

Default = 0

Relative depletion during cropping with fertilizer

Multiplier factor in soil fertility depletion process as effect of fertilizer application during cropping

-

Default = 0.5

Relative depletion during planting with fertilizer

Multiplier factor in soil fertility recovery process as effect of fertilizer application when monoculture plantation systems are adopted.

-

Default = 0.5

Weather variability

Weather variability factor which could affect crop productivity

-

Default = 0.5

Conversion efficiency of each crop type

It shows crop efficiency to convert fertility that’s been used into yield

Mg yield/ qualitative fertility scale

0 = inefficient crop

1 = the most efficient crop

Default =0.4-0.5

Sensitivity to weather variability of each crop type

It shows how sensitive a crop to weather variability in term of its productivity.

-

Default = 1

Minimum relative soil fertility of crop growing range

Minimum relative soil fertility where crop can still grow

qualitative fertility scale

Default = 0.00-0.41

Minimum expected crop yield

Minimum crop yield expected to be gained

Mg/ha

Default = 0.01-0.11

Maximum relative soil fertility of crop growing range

Maximum relative soil fertility where crop can still grow

qualitative fertility scale

Default = 0.75-1.00

Maximum expected crop yield

Maximum crop yield expected to be gained

Mg/ha

Default = 0.40-0.50

Relative food consumption factor of each food-crop

It shows the variability of food-crops to suffice calorie needs.  People eat less amount of rice than cassava to supply the same amount of calorie.

-

Default = 1

Parameters

Description

Unit

Value

Code in PCRaster

Code in STELLA

Total annual of daily food requirement per capita

Mg/person/yr

Default = 0.517

Fraction of food store loss

Annual fraction of the amount of food that is lost from the food-store due to rats etc.

-

Default = 0.15

Food equivalent price of fertilizer

It tells that if people could buy fertilizer using food, how many amount of food should they pay for certain amount of fertilizer. 

-

Default = 0.5

Target stock year of food store

Duration (in years) as targeted by people to be able to suffice their food needs from the food store.

yrs

Default = 2

Aversion risk of selling food

It shows the risk that may come if people sell their own food with regards to the price of the food at the market if they want to buy it one day.

-

Default = 1

Non food consumption power

The power factor that shows how people tend to use their money for non-food needs.

-

Default = 1

Exchange food at the market?

Option to activate market in the landscape so that people can exchange their food.

-

0 = No

1 = Yes

Default = 1

Initial value of total financial capital

Initial state of financial capital at the landscape

IDR

Default = 0

Parameters

Description

Unit

Value

Code in PCRaster

Code in STELLA

Decision rule in adjusting cropping intensity

It shows the basis of people on how they will adjust the cropping intensity for the next year.  It may be based on how is the current stock of their food, whether it is sufficient or deficit.  It can be also based on how they experienced about their latest expectation, whether it is overestimate or underestimate.  See: cropping intensity adjustment for another explanation.

-

1 = based on food stock condition

2 = based on expectation

Default = 2

Step made to adjust cropping intensity

It shows the degree of the step would be taken by people in adjusting cropping intensity for the next cropping year.

-

Default = 0.05

Maximum step could be taken in adjusting cropping intensity

Upper limit of the step could be taken by people in adjusting cropping intensity for the next cropping year.

-

Default = 2.5

Parameters

Description

Unit

Value

Code in PCRaster

Code in STELLA

Rule on cropping implementation

It tells how people select the lands that will be prepared for crop cultivation.  It can be done by considering or without considering the land attractiveness.

-

1 = without considering field attractiveness

2 = by considering field attractiveness

Default = 2

Importance of distance to settlements on cropping activities

-

-

0 = not important

1 = important

Default = 0

Importance of distance to road on cropping activities

-

-

0 = not important

1 = important

Default = 0

Importance of distance to river on cropping activities

-

-

0 = not important

1 = important

Default = 0

Cropping time on the same plot

In shifting cultivation systems, a plot will be cultivated for relatively shorter period than one in permanent agriculture systems.

yrs

Default = 2 (for shifting cultivation)

To simulate permanent agriculture scenario (segregation approach), set this value equals to the end of simulation (if you simulate 100 years, set it into 100)

Cropping cycle for multiyear cropping rotation

In some places, cropping rotation will be done not in annual basis.  For example the case found in swamp area in South Sumatra, cropping would be done in every long-drought season (El-Nino year).

yrs

Default = 1 (for shifting cultivation)

Importance of distance to river for wetland agriculture

-

0 = not important

1 = important

Default = 1

Importance of slope for wetland agriculture

-

0 = not important

1 = important

Default = 1

Cropping time modifier for wetland agriculture

-

Default = 1

Treat a crop type as wetland crop?

-

0 = No

1 = Yes

Parameters

Description

Unit

Value

Code in PCRaster

Code in STELLA

Commencing year of successional stage

It tells how old forests or agroforests will reach certain successional stage.  In this model, based on its successional stage forest is grouped into pioneer, young secondary, old secondary, and primary, while agroforest is classified into pioneer, early production, late production, and post production.  Only forests and agroforests are considered as fallowed type of vegetations that experience succession.

yrs

Default:

Forests

Pioneer = 1

Young secondary = 10

Old secondary = 25

Primary = 100

Agroforests

Pioneer = 1

Early production = 8

Late production = 20

Post production = 50