• Effluent irrigation
Growers of aspen trees for
pulpwood may wish they
could “latch onto*’ irrigation
water from the nearest
municipal sewage plant.
Experiments at The Penn
sylvania State University
have found that aspens
irrigated with sewage ef
fluent reach marketable size
12 to 14 years sooner than
aspens not irrigated.
Average age of the trees
treated with effluent was 17
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years while the untreated
trees averaged 28 years.
Increased fiber length in the
irrigated trees produced a
better fiber length to width
ratio, considered an ad
vantage to pulp strength.
The experiments were
carried out by Dr. Wayne K.
Murphey, professor of wood
technology, and Joseph J.
Bowier, former graduate
student in the School of
Forest Resources. The
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aids aspen growth
researchers were concerned
with wood developed through
a specific time period and
chose equal-sized trees
rather than equal-age trees.
All trees sampled were 10 to
13 inches in diameter at
breast height.
Irrigation was continuous
from 1965 to 1973 when
growth and fiber length of
irrigated and unirrigated
trees were compared. The
trees were growing on an old
COMPLETE FARM MACHINERY DEALER
MECHANIZE WITH C. B. HOOBER'S NEW PRODUCTS
oves through full length
discharge gate (2) into auger conveyor (3) picking up the
ingredients the full length of the mixer then placing the
thoroughly blended feed on the side conveyor elevator
field near University Park
where Penn State scientists
study the effects of effluent
irrigation on field crops and
forests. The effluent was
sprayed at a rate of 2 inches
per week. By 1974 a total of
about 800 inches of effluent
had been applied. On a per,
acre basis, the spraying put
on about 1335 pounds of
nitrogen, 1024 pounds of
chlorine, 252 pounds of
potassium, 299 pounds of
construction (1) inside
5 RP M tumbling the
ig action No packing or
AVAILABLE IN 2 SIZES - MODEL 180 (180 BU.; t MOD. 320 (320 BU.)
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768-8231
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,ABOVE COST
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Phone 768-8231 After 5:00 P.M. Phone 768-8555
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Lancaster Farming. Saturday, July 12.1975
phosphorus, 959 pounds of
calcium, 400 pounds of
magnesium, 600 pounds of
sodium, and varying
amounts of trace elements.
Average annual growth in
the crowns (tops) was
significantly larger than at
the mid-boles or the bases.
Trees were sampled from
the interior of treated and
untreated stands to avoid
border effects.
Earlier studies at Penn
State showed the value of
recharging ground water
reserves with effluent.
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Water and nutrient benefits
to field crops have likewise
been proven.
Lo, all these things
worketh God oftentimes
with man. To bring back
his soul from the pit, to
be enlightened with the
light of the living.
Job 33:29,30
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