MANNER synthetic-fertiliser application-rate factor.
Source:R/datasets_balances.R
manner_rate_factor.RdMultiplicative ammonia-volatilisation factor for synthetic fertiliser as a
function of the nitrogen application rate, keyed by fertiliser, soil type
(calcareous / non-calcareous) and application-rate bin (kg N/ha). Used by
calculate_manner_nh3()'s synthetic-fertiliser path. AN and CAN are 1 for
every soil type and rate bin; Urea follows the same rate-response curve on
both soil types; AS follows the Urea curve on calcareous soils and is 1 on
non-calcareous soils.
Format
A tibble with columns:
- fertiliser
Synthetic fertiliser:
"Urea","AN","CAN"or"AS".- soil_type
"calcareous"or"non-calcareous".- rate_bin
Application-rate bin (kg N/ha): one of
"0-30","30-60","60-90","90-120","120-150","150-180","180-200",">200".- factor
Numeric multiplicative rate factor.
Source
WHEP project-internal coefficient workbook (not a public DOI):
Spain historical MANNER implementation, NH3_model.xlsx, sheet
"synthetic fertilisers".
Examples
manner_rate_factor
#> # A tibble: 64 × 4
#> fertiliser soil_type rate_bin factor
#> <chr> <chr> <chr> <dbl>
#> 1 AN calcareous 0-30 1
#> 2 CAN calcareous 0-30 1
#> 3 Urea calcareous 0-30 0.4
#> 4 AN non-calcareous 0-30 1
#> 5 CAN non-calcareous 0-30 1
#> 6 Urea non-calcareous 0-30 0.4
#> 7 AS calcareous 0-30 0.4
#> 8 AS non-calcareous 0-30 1
#> 9 AN calcareous 30-60 1
#> 10 CAN calcareous 30-60 1
#> # ℹ 54 more rows