Agriculture & Biology
animal manures
83%
Azospirillum brasilense
64%
soil
64%
phosphorus
58%
corn
43%
nitrogen
35%
fertilizers
33%
silicon
31%
crops
29%
poultry manure
29%
grain yield
29%
ash (inorganic matter)
26%
wheat
22%
lethal dose
21%
concentrated animal feeding operations
19%
2,4-D
18%
uptake mechanisms
17%
silicates
16%
shoots
15%
Bradyrhizobium
15%
triple superphosphate
15%
nutrient use efficiency
15%
nitrogen fertilizers
14%
testing
14%
fractionation
13%
soil pH
13%
water
13%
soil water
12%
cowpeas
12%
nutrient uptake
12%
farms
12%
risk factors
12%
nutrients
12%
urea
11%
ammonium phosphates
11%
Wisconsin River
11%
residual effects
11%
urease inhibitors
10%
clay
10%
fresh produce
9%
Hapludox
9%
subsurface drainage
9%
incinerators
9%
soil sampling
9%
magnesium phosphates
9%
soil enzymes
8%
Earth & Environmental Sciences
manure
79%
soil
42%
phosphorus
41%
inoculation
35%
fertilizer
32%
wheat
28%
nitrogen
26%
crop
24%
soil test
24%
maize
23%
ash
21%
farm
16%
effect
13%
fractionation
13%
risk factor
12%
superphosphate
12%
urea
12%
silicon
11%
soil water
11%
rate
10%
pathogen
10%
environmental chemistry
9%
yield response
8%
penetration
8%
clipping
8%
soil amendment
8%
water
8%
cover crop
8%
inorganic phosphorus
8%
organic phosphorus
8%
poultry
7%
growth response
7%
pet
7%
calcareous soil
7%
alfalfa
7%
ammonium
7%
hydrophobicity
7%
incinerator
7%
calcium
7%
credit
6%
vegetation type
6%
infiltration
6%
livestock
6%
tillage
6%
enzyme activity
6%
toxin
6%
structural change
6%
trial
6%
sandy soil
6%
Medicine & Life Sciences
Manure
100%
Soil
73%
Azospirillum brasilense
44%
Fertilizers
40%
Nitrogen
38%
Zea mays
38%
Organic Agriculture
35%
Phosphorus
33%
2,4-Dichlorophenoxyacetic Acid
29%
Silicon
22%
Nutrients
20%
Fertilization
16%
Animals
15%
trinexapac-ethyl
15%
Triticum
15%
Oryza
14%
Silicates
13%
Shiga-Toxigenic Escherichia coli
10%
Bradyrhizobium
10%
Vigna
9%
Brazil
9%
Acids
8%
Vitis
8%
Meat
7%
Digestion
7%
Listeria monocytogenes
7%
phosphorus pentoxide
7%
Poultry
7%
Calcium Carbonate
6%
Solubility
6%
Farms
5%
Tobacco
5%
Crop Production
5%
Livestock
5%