vars_Fcr: vars_Fcr

Description Arguments Details Value Author(s) References See Also Examples

Description

This example matrix contains space for input data on the variable(s) that may be used for calculating N from crop residues and forage/pasture renewal.

Arguments

crop_name:

identifies the the crop of interest

crop_kg_per_ha:

user input of crop yield per hectare for the given crop kg/ha

dry_frac:

dry matter fraction of harvested product; i.e. the discounting factor for weight at time of harvest to weight when full dried

slope:

slope of the regression line relating above-ground residue dry matter to harvested dry matter yield for the given crop

slope_2SDpctMEAN:

shows the percentage (+/-) of the mean represented by 2SD of the slope

intercept:

intercept of the regression line relating above-ground residue dry matter to harvested dry matter yield for the given crop

intercept_2SDpctMEAN:

shows the percentage (+/-) of the mean represented by 2SD of the intercept

R2_adj:

the adjusted R-squared value for the regression of residue dry matter on harvested dry matter yield for the given crop

TOTarea_ha:

total annual area harvested of crop T, ha yr -1

BURNTarea_ha:

annual area of crop T burnt, ha yr -1

Cf:

combustion factor (dimensionless) (refer to Chapter 2, Table 2.6)

frac_ren:

fraction of total area under crop T that is renewed annually 15 . For countries where pastures are renewed on average every X years, Frac Renew = 1/X. For annual crops Frac Renew = 1

Nag_kg:

N content of above-ground residues for crop T, kg N (kg d.m.) -1 ,(Table 11.2)

frac_remv:

fraction of above-ground residues of crop T removed annually for purposes such as feed, bedding and construction, kg N (kg crop-N) -1 . Survey of experts in country is required to obtain data. If data for Frac Remove are not available, assume no removal.

Rbg:

ratio of below-ground residues to harvested yield for crop T, kg d.m. (kg d.m.) -1 . If alternative data are not available, R BG(T) may be calculated by multiplying R BG-BIO in Table 11.2 (given as Rbg in this matrix) by the ratio of total above-ground biomass to crop yield ( = [(AG DM(T) * 1000 + Crop (T) ) / Crop (T) ], (also calculating AG DM(T) from the information in Table 11.2).

Rbg_error_pct:

ratio of below-ground residues to harvested yield for crop T, kg d.m. (kg d.m.) -1 . If alternative data are not available, R BG(T) may be calculated by multiplying R BG-BIO in Table 11.2 by the ratio of total above-ground biomass to crop yield ( = [(AG DM(T) * 1000 + Crop (T) ) / Crop (T) ], (also calculating AG DM(T) from the information in Table 11.2).

Nbg_kg:

N content of below-ground residues for crop T, kg N (kg d.m.) -1 , (Table 11.2)

Details

The crop yield and total harvested area are set as variables by definition and thus should always appear as vectors in a matrix such as vars_Fcr (or be available as a stand-alone vectors). However, other data that appear as parameters in pars_Fcr may be passed as variables, and thus those data are included in this example matrix, vars_Fcr.

Value

numeric value

Author(s)

Joshua Perlman and Robert Hijmans

References

2006 IPCC Guidelines for National Greenhouse Gas Inventories, Volume 4 Agriculture, Forestry and Other Land Use http://www.ipcc-nggip.iges.or.jp/public/2006gl/index.html

See Also

pars_Fcr Fcr_tier1a Fcr_tier1b

Examples

1
2
data("vars_Fcr")
vars_Fcr

emissions documentation built on May 2, 2019, 6:09 p.m.