Our fifth stop on the cover crop caravan this spring took us to Postville in northeast Iowa. We were greeted that morning with a fresh snow fall that unfortunately made it impractical to see cover crops in action, luckily our presenters had lots of photos to remind us what spring and summer look like. Don […]
April 11, 2018
If cover crops can successfully be
established when interseeded into
corn in June, this may permit farmers
to use existing equipment (rather than
high-clearance machines or airplanes);
may permit the use of more diverse
cover crop species; and ultimately
may increase the amount cover crop
• Jack Boyer interseeded a 4-species and
6-species cover crop mix into seed corn
at the V4-V6 stage in randomized and
• Both the 4-species and 6-species mixes
survived below the seed corn canopy
and produced similar amounts of
aboveground biomass by mid-October.
• The interseeded cover crop mixes had
no adverse effect on seed corn yield.
June 12, 2017
In a Nutshell
• Interseeding annuals into pastures
increases forage diversity, quality, and
• Bruce Carney developed seed mixtures
and interseeded them into existing
cool season pastures.
• Seed mixtures vastly increased pasture
• Grazing management to harvest or
trample forage at the right time and
to a proper degree is essential to feed
both livestock and soil microbes.
• During the establishment year in 2014,
few advantages were seen in grazing
days or forage yield, but a baseline
was established for future comparison.
• In 2015, two fields were seeded once
with a cool season mix, and one field
was seeded multiple times with cool
and warm season mixes.
• Total tons of dry matter harvested by
cattle or baled was greater in 2015
than 2014; animal unit days provided
from forage produced were doubled
from year 2014 to year 2015.
• After multiple interseedings and two
years of rotational grazing on three
pastures, compaction near the soil
surface (<6 inches) increased but decreased deeper down (>21 inches).
July 6, 2016
Objective: How does interseeding annual species improve quality and quantity of perennial pasture?
June 28, 2016
Objective: To experiment with seeding multi-species forages into existing pastures and monitor performance of livestock, forage and the soil.
July 5, 2015