Agriculture & Biology
continuous cropping
81%
nutrient use efficiency
70%
no-tillage
63%
wheat
40%
nitrogen fertilizers
28%
fallow
24%
soybeans
23%
cropping systems
22%
cropping sequence
19%
pastures
18%
conventional tillage
17%
crops
16%
winter
15%
tillage
15%
preserves
15%
soil quality
14%
physical properties
12%
grain yield
12%
soil
11%
infiltration rate
10%
aggregate stability
10%
soil productivity
10%
soil aggregates
10%
corn
9%
soil physical properties
8%
soil organic carbon
8%
soil nutrients
8%
soil properties
7%
Helianthus annuus
7%
physicochemical properties
6%
summer
5%
degradation
4%
nitrogen
4%
water
3%
Earth & Environmental Sciences
continuous cropping
100%
cropping practice
62%
wheat
57%
nitrogen
37%
soybean
34%
crop
34%
tillage
33%
fallow
27%
fertilizer
27%
pasture
22%
sorghum
20%
soil
20%
physical property
18%
soil quality
16%
winter
14%
maize
14%
preserve
13%
aggregate stability
10%
soil aggregate
9%
soil nutrient
8%
total organic carbon
7%
chemical property
6%
soil property
6%
infiltration
6%
productivity
5%
rate
5%
degradation
5%
summer
4%
chemical
3%
experiment
3%
water
2%