Agriculture & Biology
forest litter
99%
soil organic matter
81%
calcium
54%
Abies
39%
Betula
36%
soil
35%
Picea
34%
organic matter
31%
cold soils
28%
water
28%
calcium silicate
23%
Northeastern United States
23%
organic carbon
18%
acid soils
18%
hardwood
17%
long term effects
16%
nuclear magnetic resonance spectroscopy
16%
carbohydrates
11%
degradation
10%
nutrients
10%
dosage
8%
Earth & Environmental Sciences
forest floor
100%
calcium
66%
hot water
64%
organic matter
57%
soil
30%
soil organic matter
27%
watershed
21%
effect
20%
wollastonite
19%
brook
16%
long-term effect
15%
carbohydrate
14%
litter
13%
nuclear magnetic resonance
13%
dosage
12%
soil water
11%
organic carbon
11%
decomposition
10%
cold
10%
nutrient
9%
chemical
7%
experiment
5%
rate
4%