NUE_TrnDat: Training data for the nitrogen use efficiency model.

In paulhegedus/OFPE: On-Farm Precision Experiments (OFPE) Data Management and Analysis Tools

Training data for the nitrogen use efficiency model.

Description

A dataset containing soil and plant biomass sampling data, remotely sensed covariates, and NUE calculations for four fields across two years. This data is used to train the NUE model used to optimize efficiency on maximized profit and minimized risk of N loss.

Usage

NUE_TrnDat

Format

A data frame with 270 rows and 75 variables:

samplePnt

Sample number, out of 75 potential points in the field.

field

Name of the field sampled.

farm

Name of the farm that the field is part of.

year

Year sampling occured.

fid

Unique identifier for observation within field.

mean_vwc.august

Mean VWC across the top 30cm measured in August.

mean_vwc.march

Mean VWC across the top 30cm measured in March.

sum_soil_N_kgm2.august

Sum of the soil total N across the top 30cm in August in kg/m2.

sum_soil_N_kgm2.march

Sum of the soil total N across the top 30cm in March in kg/m2.

mean_pct_TN.august

Mean percent total N across the top 30cm in August.

mean_pct_TN.march

Mean percent total N across the top 30cm in March.

mean_pct_TC.august

Mean percent total C across the top 30cm in August.

mean_pct_TC.march

Mean percent total C across the top 30cm in March.

mean_bd_gcm3.august

Mean bulk density across the top 30cm in August in g/cm3.

mean_bd_gcm3.march

Mean bulk density across the top 30cm in March in g/cm3.

sum_Nmin_kgm2

Sum of the mineralized N (kg/m2) across the top 30cm, averaged across March and August measurements of percent TN according to Vigil et al. 2002.

crop_pct_TN

Percent total N measured in the crop's above ground biomass.

crop_pct_TC

Percent total C measured in the crop's above ground biomass.

x

The x coordinate projected into UTM zone 12.

y

The y coordinate projected into UTM zone 12.

rx_N_lbsac

The prescribed N rate in lbs/ac.

ssurgo

The SSURGO soil texture class.

WHC_OG

The WHC classification sampling was stratified on.

yld

Grain yield in bushels/acre.

aa_n

As-applied N rates in lbs/ac.

slope

The slope at the observed point.

elev

The elevation (m) at the observed point.

tpi

The topographic position index at the observed point.

prec_cy_d

Precipitation (mm) measured from Daymet V3 (1km) from Nov 1 of the prior year to Mar 30 of the harvest year.

prec_py_d

Precipitation (mm) measured from Daymet V3 (1km) from Nov 1 of two years prior to Oct 31 of the year prior to harvest.

gdd_cy_d

Growing degree days measured from Daymet V3 (1km) from Jan 1 of the harvest year to Mar 30 of the harvest year.

gdd_py_d

Growing degree days measured from Daymet V3 (1km) from Jan 1 of prior year to Dec 31 of the year prior to harvest.

prec_cy_g

Precipitation (mm) measured from GridMET (4km) from Nov 1 of the prior year to Mar 30 of the harvest year.

prec_py_g

Precipitation (mm) measured from GridMET (4km) from Nov 1 of two years prior to Oct 31 of the year prior to harvest.

gdd_cy_g

Growing degree days measured from GridMET (4km) from Jan 1 of the harvest year to Mar 30 of the harvest year.

gdd_py_g

Growing degree days measured from GridMET (4km) from Jan 1 of prior year to Dec 31 of the year prior to harvest.

ndvi_cy_s

Normalized difference vegetation index (NDVI) measured from Sentinel 2 (10m) from Jan 1 of the harvest year to Mar 30 of the harvest year.

ndvi_py_s

Normalized difference vegetation index (NDVI) measured from Sentinel 2 (10m) from Jan 1 of the prior year to Dec 31 of the prior year before harvest.

ndvi_2py_s

Normalized difference vegetation index (NDVI) measured from Sentinel 2 (10m) from Jan 1 two years prior to Dec 31 two years prior to the harvest year.

ndvi_cy_l

Normalized difference vegetation index (NDVI) measured from Landsat (30m) from Jan 1 of the harvest year to Mar 30 of the harvest year.

ndvi_py_l

Normalized difference vegetation index (NDVI) measured from Landsat (30m) from Jan 1 of the prior year to Dec 31 of the prior year before harvest.

ndvi_2py_l

Normalized difference vegetation index (NDVI) measured from Landsat (30m) from Jan 1 two years prior to Dec 31 two years prior to the harvest year.

ndwi_cy_s

Normalized difference water index (NDWI) measured from Sentinel 2 (10m) from Jan 1 of the harvest year to Mar 30 of the harvest year.

ndwi_py_s

Normalized difference water index (NDWI) measured from Sentinel 2 (10m) from Jan 1 of the prior year to Dec 31 of the prior year before harvest.

ndwi_2py_s

Normalized difference water index (NDWI) measured from Sentinel 2 (10m) from Jan 1 two years prior to Dec 31 two years prior to the harvest year.

ndwi_cy_l

Normalized difference water index (NDWI) measured from Landsat (30m) from Jan 1 of the harvest year to Mar 30 of the harvest year.

ndwi_py_l

Normalized difference water index (NDWI) measured from Landsat (30m) from Jan 1 of the prior year to Dec 31 of the prior year before harvest.

ndwi_2py_l

Normalized difference water index (NDWI) measured from Landsat (30m) from Jan 1 two years prior to Dec 31 two years prior to the harvest year.

aspect_cos

Aspect/exposure measured in the E/W direction.

aspect_sin

Aspect/exposure measured in the N/S direction.

musym

USDA soil texture classification.

bulkdensity

Soil bulk density (g/m3) gathered from OpenLandMap (250m) and averaged over 200cm.

claycontent

Percent clay gathered from OpenLandMap (250m) and averaged over 200cm.

sandcontent

Percent sand gathered from OpenLandMap (250m) and averaged over 200cm.

phw

The pH of soil water gathered from OpenLandMap (250m) and averaged over 200cm.

watercontent

Percent water gathered from OpenLandMap (250m) and averaged over 200cm.

carboncontent

Percent soil organic carbon gathered from OpenLandMap (250m) and averaged over 200cm.

pro

Measured grain protein concentration (%).

dep_N_kgha

Deposition of atmospheric N (kg/ha).

sim_crop_N_kgm2

Simulated crop N (kg/m2) from Jackson et al. 2005.

crop_N_kgm2

Measured crop N (kg/m2).

yld_kgha

Measured crop yield (kg/ha).

rx_N_kgha

Prescribed N fertilizer (kg/ha).

aa_N_kgha

As-applied N fertilizer (kg/ha).

aa_N_kgm2

As-applied N fertilizer (kg/m2).

sum_soil_N_kgha.march

Sum of the soil total N across the top 30cm in March in kg/ha.

sum_soil_N_kgha.august

Sum of the soil total N across the top 30cm in August in kg/ha.

sum_Nmin_kgha

Sum of the mineralized N (kg/ha) across the top 30cm, averaged across March and August measurements of percent TN according to Vigil et al. 2002.

dep_N_kgm2

Deposition of atmospheric N (kg/m2).

sim_crop_N_kgha

Simulated crop N (kg/ha) from Jackson et al. 2005.

crop_N_kgha

Measured crop N (kg/ha).

FUE

Fertilizer use efficiency, calculated as Ncrop / Nfert.

NUE

Nitrogen use efficiency, calculated as (Ncrop + Naugust) / (Nfert + Ndep + Nmin + Nmarch).

NUE_noTN

Nitrogen use efficiency without soil TN measures, calculated as (Ncrop) / (Nfert + Ndep + Nmin).

WHC

The WHC classification used as a covariate.

paulhegedus/OFPE documentation built on Nov. 23, 2022, 5:09 a.m.