NDVI
The Normalized Difference Vegetation Index (NDVI) is a standardized index allowing you to generate an image displaying greenness
(relative biomass) and measure a crop’s overall health. This index takes advantage of the contrast of the characteristics of two
bands from a multispectral raster dataset—the chlorophyll pigment absorptions in the red band and the high reflectivity of plant
materials in the near-infrared (NIR) band.
NDVI_ref
NDVI_ref, NDVI_reference also known as Nitrogen (N) Rich Strip, is the maximum amount of N that could be applied to the field.
This represents the gauge against whether to apply more or less N.
NDVI_fp
FP stands for field or farmer practice. NDVI_fp measures the current health of a plant or crop. This measure can be taken by the
Greenseeker Handheld Crop Sensor or by other means.
Crop and %N
The %N is an average representation of the amount of N for that crop. The crop name does not represent a specific seed or variety.
This number may be changed if an actual %N is known.
NDVI_soil
NDVI_soil represents the amount of nitrogen in the bare soil. The default is set to 0.15.
NUE
Nitrogen Use Efficiency (NUE) measures the crop’s effectiveness of using and absorption of N. The default is set to 55%.
Max Yield
This represents the maximum amount yield potential of a crop per unit area of land and the seed generation of the plant itself.
N Rate
N Rate is the estimated fertilizer application rate generated based on the inputs provided.
Response Index
Response Index is an output that measures the expected response of applying N based on the inputs provided.
Fertilizer Estimation Chart
This graph is a visual representation of the calculator inputs and how they relate to the N Rate