generate_variable_rate: Creates a variable rate nitrogen application image based on...

In beardon/ninja-active-mapper: Maps actively measured NDVI from passively measured NDVI imagery

Creates a variable rate nitrogen application image based on Nitrogen Rich Strip (n_rich_strip), Farmer/Target (farmer_practice), Growing Degree Days (GDD), and active_ndvi(Target).

Description

Creates a variable rate nitrogen application image based on Nitrogen Rich Strip (n_rich_strip), Farmer/Target (farmer_practice), Growing Degree Days (GDD), and active_ndvi(Target).

Usage

generate_variable_rate(
  yld_fert_field,
  yld_ptnl_field,
  grain_N = 0.024,
  NUE = 0.6
)

Arguments

n_rich_strip	(originally NRS) the average NDVI of the N-rich strip (unitless 0-1 scale)
farmer_practice	(originally FT) the average NDVI of farmer practice adjacent to the N-rich strip (unitless 0-1 scale)
GDD	This parameter is the number of days with growing degrees greater than 0 since planting (1 to 260)
active_ndvi	(originally Target) A raster image generated from the NinjaActiveMapper::krige function (unitless 0-1 scale)
min_appl_rate	Minimum nitrogen application rate (lbs per acre) to be applied across the field (range would depend on crop, but probably 0 to 50?)

Value

The SBNRC adjusted Nitrogen rate

Examples

VRN(n_rich_strip=0.7,farmer_practice=0.54,GDD=85,active_ndvi,min_appl_rate=0)

beardon/ninja-active-mapper documentation built on April 24, 2023, 10:06 a.m.