Keyphrases
Rice
74%
N Status
72%
Active Canopy Sensor
68%
Nitrogen Status
64%
Northeast China
59%
Nitrogen nutrition Index
59%
Vegetation Index
57%
Winter Wheat
53%
North China Plain
53%
N Management
51%
Nitrogen N
42%
China
41%
Maize
40%
N Rate
39%
Management Strategy
36%
Plant Nitrogen Concentration
33%
Red Edge
33%
Crop Circle
32%
Sensor-based
31%
Aboveground Biomass
31%
Normalized Difference Vegetation Index
30%
Nitrogen Diagnosis
29%
Plant N Uptake
29%
Farmers' Fields
27%
N Use Efficiency
26%
Precision N Management
25%
GreenSeeker
23%
Grain Yield
22%
Precision Nitrogen Management
20%
Economic Optimum N Rate
19%
Paddy Rice
19%
Ratio Vegetation Index
18%
Machine Learning
17%
Growing Season
17%
Plant Height
17%
Remote Sensing
17%
Precision Agriculture
17%
Corn Yield
16%
Active Crop Canopy Sensor
16%
Rice Yield
15%
Hyperspectral
15%
Nitrogen Fertilizer
15%
UAV
15%
Nitrogen Management Strategies
14%
GreenSeeker Sensor
14%
Crop N Status
14%
Hyperspectral Vegetation Index
13%
On-farm Trials
13%
Vehicle-based
13%
Index Prediction
12%
Agricultural and Biological Sciences
Vegetation Index
100%
Nutrition Assessment
61%
Grains
60%
Remote Sensing
48%
Red Edge
44%
Aboveground Biomass
40%
Chlorophyll
37%
Normalized Difference Vegetation Index
36%
Growing Season
28%
Nitrogen Nutrition Index
27%
Unmanned Aerial Vehicle
27%
Heading
24%
Crop Management
23%
Stem Elongation
23%
Paddies
22%
Cultivar
19%
Precision Agriculture
19%
Leaf Area Index
14%
Triticum aestivum
14%
Planting Density
13%
Spring Maize
11%
Spadix
11%
Information Systems
10%
Farming Systems
9%
Soil Property
9%
Neural Network
9%
Application Rate
9%
Rhizosphere
8%
Synthetic Aperture Radar
8%
Soil Nutrient
8%
Spectrometer
8%
Landsat
7%
Soil Testing
7%
Information Management
7%
Nutrient Management
7%
Nitrogen Fertilizer
7%
Tillering
7%
Growth Models
6%
Asian Rice
6%
Greenhouse Gas
5%
Climate Change
5%
Wind Speed
5%
Least Square
5%
