Earth & Environmental Sciences
crop production
92%
energy use
90%
fertilizer
73%
indicator
50%
energy
41%
rate
27%
mineral
13%
norm
11%
manure
11%
parameter
8%
mineral fertiliser
7%
organic fertiliser
7%
fertilizer application
7%
production system
6%
index
6%
climate conditions
6%
standardization
6%
wheat
5%
economy
4%
nitrogen
3%
effect
1%
Agriculture & Biology
fertilizer rates
100%
crop production
79%
energy
50%
minerals
18%
cow manure
14%
subarctic climates
10%
Estonia
7%
organic fertilizers
6%
spring wheat
6%
mineral fertilizers
6%
standardization
6%
fertilizer application
5%
nitrogen fertilizers
5%
production technology
5%
nitrogen
3%