Environmental and economic costs of soil erosion and conservation benefits.
Soil erosion is a major environmental threat to the sustainability and productive capacity of agriculture. During the last 40 years, nearly one-third of the world's arable land has been lost by erosion and continues to be lost at a rate of more than 10 million hectares per year. With the addition of a quarter of a million people each day, the world population's food demand is increasing at a time when per capita food productivity is beginning to decline.
Pimentel
D
D
Harvey
C
C
Resosudarmo
P
P
Sinclair
K
K
Kurz
D
D
McNair
M
M
Crist
S
S
Shpritz
L
L
Fitton
L
L
Saffouri
R
R
Blair
R
R