Landbrug og biologi
aboveground biomass
9%
alluvial soils
12%
ammonia
23%
crop yield
8%
crops
4%
delta soils
16%
denitrification
11%
dry season
25%
drying
49%
fertilizers
6%
flood irrigation
87%
grain yield
7%
irrigation
21%
mineralization
9%
nitrification
21%
nitrogen fertilizers
58%
paddies
63%
production technology
7%
rice
12%
soil
4%
soil horizons
12%
soil pH
8%
topsoil
20%
urea
7%
Vietnam
66%
volatilization
21%
water management
31%
Geo- og miljøvidenskab
aboveground biomass
8%
ammonia
12%
crop
5%
crop yield
8%
denitrification
7%
dry season
22%
drying
53%
effect
14%
fertilizer
55%
field experiment
7%
flooding
50%
fold
5%
harvest
7%
irrigation
18%
loss
12%
management practice
7%
mineralization
5%
nitrification
14%
nitrogen
38%
paddy field
68%
parameter
2%
production system
8%
rice
14%
soil
10%
soil horizon
9%
topsoil
15%
urea
8%
volatilization
17%
water management
20%
wetting
62%
Medicin og biovidenskab
Ammonia
18%
Biomass
9%
Denitrification
13%
Fertilizers
100%
Nitrification
29%
Nitrogen
63%
Oryza
76%
Practice Management
9%
Soil
52%
Urea
7%
Vietnam
76%
Volatilization
21%
Water
16%