Earth & Environmental Sciences
environmental risk
91%
cropping practice
89%
wheat
81%
maize
79%
canopy
73%
sensor
61%
nitrogen
53%
crop
14%
developing world
11%
demand
8%
soil test
8%
fertilizer application
8%
environmental degradation
7%
loss
7%
food security
7%
rhizosphere
7%
environmental pollution
6%
field experiment
6%
greenhouse gas emissions
6%
comparison
5%
environmental impact
5%
plain
5%
agriculture
4%
province
4%
winter
4%
summer
3%
soil
2%
Agriculture & Biology
nutrient use efficiency
100%
sensors (equipment)
85%
cropping systems
85%
canopy
71%
wheat
57%
corn
55%
developing countries
13%
China
13%
sustainable agricultural intensification
11%
crops
11%
farmers
9%
soil heterogeneity
9%
environmental degradation
9%
greenhouse gas emissions
7%
space and time
7%
food security
6%
environmental impact
6%
winter wheat
6%
fertilizer application
6%
nitrogen fertilizers
6%
rhizosphere
6%
pollution
5%
Triticum aestivum
5%
climate change
5%
Zea mays
5%
summer
4%
nitrogen
4%
soil
3%
testing
2%