vars_Fcr: vars_Fcr
In emissions: What the package does (short line)

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

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.

`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)

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.

numeric value

Joshua Perlman and Robert Hijmans

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

pars_Fcr Fcr_tier1a Fcr_tier1b