Ag Data Mapping Mid Term Exam Additional terms

what do digital ag. systems include?

precision farming and an other operation involves with Ag.

with digital technology farmer can be better at what 2 things?

planners and executors

what are the 3 steps of digitizing data?

1. data collected by digital systems
2. data saved in spreadsheet software
3. digitized maps

what are a couple of platforms for digital agriculture?

for mapping we got, FieldView and Farmers edge

for business we got AGRIVI and Farmers Business network

what is the definition of precision ag by sdsu.

The site-specific implementation of management practices that will economically optimize yields while maintaining the soil, water, atmospheric, plant, and animal natural resources.

what is the definition of precision ag by national society

a management strategy that gathers, processes and analyzes temporal, spatial and individual plant and animal data and combines it with other information to support management decisions according to estimated variability for improved resource use efficiency, productivity, quality, profitability and sustainability of agricultural production.

what is one part of site-specific management

Variable rate applications of fertilizers, seeds, pesticides, or water

what is 4R

science-based management

spatil components measures by GPS what?

X-longitude Y-latitude

what is GIS

Geographic Information System

whats spatial data

geographically referenced information

vector is

point, line ,polygon

raster

images

point is

txt, csv, shp

line.polygons is

shp file

raster is

tif,img,las,jpg

.shp is

the feature geometry itself

What is Mapping?

Spatially displayed data in 2-D or 3-D

Yields vary due to

soil parameters (texture, drainage), landscapes, and management practices.

Geographic Coordinate System in 2-D

is a basic projection of vector dataset

Mass flow impact sensor

on yield-monitoring system

Light sensor

yield-monitoring system

Volumetric sensors measure

the volume of grain on each individual paddle

Moisture sensor

on yield-monitoring system

The calibration process is fitting a response curve between mass flow sensor signal strength (V) and grainmassflow rate (lb/sec)to estimate_________

grain yields

When yield is measured by a yield monitor and calculated with the measured grain moisture, the value is called_________

Wet yield

When yield is calculated with a specified grain moisture (Market Moisture), the value is called________________

Dry yield

Passive sensor

a sensor designed to receive and to measure natural emissionsreflected by the Earth's surface. (Multi-and hyper-spectral)

a sensor shoots its own signals and measures the reflected signals from the Earth's surface. (Radar, LiDAR)

Active sensor

Multi-spectral sensor -

Relatively small number (3-10) of spectral bands with broad spectral band widths (~ 100 nm). (Landsat)

Hyper-spectral sensor -

Numerous (10's to 100's) bands with narrow band widths (~ 10 nm). (Hyperion)

Satellite-

Landsat images, DEM

Aircraft-

Ortho aerial imagery, LiDAR

Drone (UAV)

-Aerial imagery

Ground-

Cropscan, Greenseeker

Different Bands provide different

Information

Different Objectives have different

Sensitivity

Natural color image

Red, Green, and Blue (RGB)

False color image

(green plants: red) NIR (near-infrared), Red, and Green

Yield monitor points:

Pixel size (resolutions): <1 m

Aerial image:

Pixel size (resolutions): 1 m

Landsat image:

Pixel size (resolutions): 30 m

MODIS image:

Pixel size (resolutions): 250 m

Atmosphere influences transmittance, by scattering and absorption, therefore we can compare within an image, __________________________________________________

but not images taken in different dates.

To solve this, we must _____________________________________________________

remove the atmospheric effects from images.

high NDVI values are correlated with _________________

high grain yields.