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Have your fraternity
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Center
Phone 475-0959
for reservations,
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TEAM OUTFITTING
I M
a ' ...
t3 ''U,
Pimeinifel
By Jann Nyffclcr
"Natural Resources
Versus Food Production"
was the topic of a lecture
given by David Pimentel
of Cornell University
Tuesday evening in the
East Union.
Pimentel, a professor
of insect ecology and
agricultural sciences at
Cornell, is one of three
visiting scholars in a series
entitled "Natural Resources
Management: Challenges
and Promises for the Fut
ure." The series is spon
sored by UNL's Depart
ment of Forestry , Fisheries
and Wildlife and funded
by a grant from the Layman
Fund.
CORNHUSKER
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4
1
speaks en
In a slide presentation
paralleling natural resources
- energy, land, water and
humans and world food
production, Pimentel
stressed various forms of
energy use in our current
food system. He added
that humans have both a
positive and negative
impact on the relation
ship, because we consume
other resources but also
contribute to natural
resource development.
There is not necessarily
a shortage of the world's
natural resources, he said,
but rather an overabund
ance of people.
Pimentel traced the
liistory of U.S. population
and energy consumption.
Currently, the United
States makes up 6 percent
of the world's population
but burns 33 percent of
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.
food, reswees
the available fossil energy.
Many less-developed count
ries rely on biomass energy
- usually in the form of
wood - for their primary
source of fuel, lie said.
However, Pimentel indi
cated that world forests
are shrinking. Trees arc
being cut for fuel; forests
are being eliminated for
use as cropland.
He went on to discuss
the availability of arable
land. In 1650, there were
four acres of usable farm
land per person. Iiy 1975,
that figure had reportedly
decreased to nine-tenths
of an acre per person, he
said, based on an esti
mated world population of
four billion.
Pimentel projects that
by the year 2 135. the
available world tillable
land will he one-quarter
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of an acre per person.
Most farmable land
in the world is already
in production, Pimentel
said, "even though some
of it shouldn't be."
"Hie less land you have
available, the more intensely
you have to manage it,"
he said.
Water erosion also can
present a problem in food
production, he said, since
soil formation is such a
slow process. Under agri
cultural conditions, it
takes 200 to 300 years
for 1 inch of topsoil to
form.
Pimentel said methods
to prevent erosion, such as
contour planting and
terracing, can be effective,
but have not seen wide
spread implementation.
On a woild basis, almost
50 percent of the potential
world food output is lost
to pests like insects and
rodents.
He reported that 17
percent of all energy used
in the United States is for
food production. If all
current petroleum reserves
were used for food product
ion, they would last about
13 more years, Pimentel
predicts.
Pimentel said he "anti
cipates severe crises" in
future food production.
"It will get worse before
it gets better," he said.
u i i
- Saturday
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