Garden
Tractor Gardening Part III -
(Wheel Horse)
Preparing the soil to plant
by
New England Gardener
This past year, 2006, I experimented
with an exciting new way to deeply loosen the soil
directly under row crops. This is done just before
planting. What I was looking for was a tine I can pull
with my small tractors, well below the depth of a
moldboard plow or rototiller. A single cultivator tine,
or a very narrow V shaped furrower will work if you add
weight to keep it in the soil, but the box blade tine's
shape pulls it deeply into the ground. For only $15
each, I purchased box blade replacement tines from Agri
Supply http://www.agri-supply.com
Model ASC 49684.
Box blade
tine bolted to Wheel Horse 'slot hitch' mold board plow
frame
This model has 4 bolt holes in the
shank, and is about 18 inches tall. I have been able to
bolt these on to Moldboard plow frames made by Wheel
Horse for there slot hitch plow, as well as onto my ten
inch Brinly Hardy sleeve hitch mold board plow frame.
It may take a little modification to attach it to my
Simplicity two wheel tractor moldboard plow frame. It
will not fit on David Bradley two wheel tractor plow
frames without cutting and welding. It would definitely
be worth doing though.
Box blade
tine digs deep into the garden soil
Although the tine itself is
relatively narrow, it loosens the dirt to a width of
4-5 inches, and a crown or hump in the soil, is raised
a couple inches by the inclined blade, and then falls
back to leave a flat surface. A single pass is perfect
for narrow crop roots, like beets, carrots and onions.
You should make a second pass, offset a couple inches
to one side for beans or corn, and three adjacent
passes for potato or a wide row of peas or carrots.
This tine pulls very easily through the soil with a 5
horse power rider at 2-3 mph. I believe a two wheel
tractor weighing 250 pounds or more could do the same
with half the horse power.
Making a
row to plant with the box blade attachment
Although the moldboard plow seems to
be the traditional tool of agriculture, some of the
early plows worked more like my box blade tine, and so
called Low till or No till Farming has gained a lot of
ground for conserving moisture, and it does not bring
weed seeds close to the surface where they can
germinate. Mold board plows can also create a hard pan
just below the depth they reach, and the heavy weight
needed for traction to pull them compresses the soil.
When moldboard plowing, the right side wheels are run
in the bottom of the previous furrow. This tilts the
tractor to that side, and takes weight off the left
wheel, making it more likely to spin. Because the box
blade is centered behind the tractor, and the drive
wheels are level, it is easier to get enough traction.
I thought of making a frame to hold two or even three
of these blades, but it takes so little time to make an
extra pass, and I alternate wide and narrow crop rows
in my garden. It would take more time to change the
attachment. It would be handy when planting a large
area of corn though.
This is what the row looks like after the box
blade tine has deeply loosened the soil. It's now
ready for spinach seed to be broadcast in a wide
row, and gently covered with a rake
Disk harrows are the easiest way to
keep the top few inches of soil weed free. They should
have enough extra weight added stay in good contact
with the ground. With a rider tractor, you should be
able to operate at 2-3 miles per hour, and at about
half that speed if you are walking behind a two wheel
tractor. With a four wheel tractor, a
large disk harrow [like I mentioned in the first article in
this series,] is ideal for use in the Spring and
Fall.
Here it is easy to see how to make passes
with a harrow in my quarter acre grain plot. I
started at the right side, made a turn at the end
of the field, and came back up on the left side
of the photo. The next trip around the field will
be along the outside side of these first two
passes. The crop in the middle is young Flax for
seed.
You can use the front half of a disk
harrow intended for the smallest farm tractors, like
the 4 cylinder International Cub. The ones
made for ATV's like Agri Supply's item
# 41342 . Another way to go, is to simply pull a
unit made for a Category '0' three point hitch along
the ground like a cart. Here is a link to
Brinly-Hardy's offering and Agri-fab
offers one too. For a two wheel tractor, you will
want one made to fit your tractor, or you can narrow a
sleeve hitch style like
this or
this. To get it to dig in deep enough, remove one
or two disks from each side, and use shorter 'axle
bolts'.
Look carefully at the depth this heavy five
foot wide disk harrow is digging into the soil,
as it tills in a light cover crop of buckwheat.
It is being pulled by the same 5 horse power
tractor shown in the other photos on this
page.
With the extra weight to really dig
in, this is all you will be able to handle easily,
behind a medium size two wheel tractor. You will end up
with a space between the disk gangs. Let's say your
disk harrow is 30 inches wide. Your gangs each cut a
width of 11 inches, leaving a gap of 8 inches between
them. On the second pass, have one gang work the soil
in the gap, and the other work the ground along one
side. This will give you a bed about 45 inches wide. A
medium size two wheel tractor will take 2-3 times as
long to cover the same area, and may not go quite as
deep, but it will probably use less fuel, since it is
not carrying you, and it also weighs much less.
This three foot wide disk harrow attaches
to the liftable hitch on the back of the tractor,
so it can be raised out of the ground at the ends
of the row. If the two disks near the center were
removed, it could straddle a row. Set up like
this, it moves the soil away from the center,
toward the sides.
When using any type of cultivator,
make a pass, and then make a comfortable turn at the
end of the row, instead of coming back right along
where you were. If you are cultivating rows, do the 1st
and 5th, and then the 2nd and 6th, and so on, working
your way across the garden. Allow enough room to make
the turn at the ends of the rows without slowing down.
This will save you time. A disk harrow with a gap in
the center can also be used for cultivating and hilling
garden rows on both 2 and 4 wheel tractors. By driving
over the rows, you are cultivating two paths at the
same time, or both sides of the plants. The taller the
crop clearance under your tractor, the longer into the
season you can do this.
This narrow 30 inch wide disk harrow was made
for a two wheel tractor, but is perfect for
hilling the rows of cucumbers or summer squash on
either side of a path. Notice it is pulled behind
the tractor like the large harrow, or like a
cart. This is an advantage, because it turns
sharply, without having to be raised out of the
ground. You can even make a tight circle around a
large hill of pumpkins or winter
squash.
My larger riders are 36 inches wide.
When I overlap the tire tracks, my rows end up 30
inches apart. A small walking tractor 22 inches wide
can cultivate each path after the rider will not clear
them. With my 30 inch wide Wheel Horse riders, the rows
are 24 inches apart. So I have taller walking tractors,
able to straddle the rows after the riders can't. By
using very slow ground speeds, I can let the crops
brush against the bottom of the tractor.
Here is the five foot disk harrow again,
tilling in corn stalks in the Fall. Just beyond
the tractor, are beets, and on the other side of
the grass access strip, are cabbages and
strawberries.
Now I have to admit that I really
like tractors, and have far more of them than I need.
So what am I recommending to those who want to work the
soil with the least amount of fuel? The size of the
tractors made in the 1950's and 60's is big enough, and
mine were easily re-powered with modern, dependable and
thrifty gas engines. You could also use a battery
electric motor system, recharged with solar panels, or
a small diesel engine. Two or three horse power is
enough for 2 wheel tractors, and five or six is plenty
for riders. Diesels can be less, if you can find them
that small, and electric motors 1/3 the horse power of
gas engines are commonly used to power hammer mills and
corn grinders and shellers.
With electric motors, speed
controllers are expensive, it makes more sense to
choose a tractor with gearbox selected speeds, like the
medium size Simplicity and Midlands, or set it up
pretty slow on a light single speed model. If you are
gardening to feed a family, the medium size walk behind
tractors, like the David Bradley's or the Simplicity
and Midland models that came with 5 - 7 horse power
engines and shift able gearboxes will be enough. You
may want a small Sears or Wheel Horse rider, especially
if you plan to grow grains, or haul firewood. The light
two wheel tractors, like Simplicity's 2 or 3 horse
power L series, make an excellent second tractor for
cultivating the rows, but wouldn't be adequate by them
selves, unless you have really light soil. Midland also
made an intermediate size, where speed changes are made
by moving the belt to a different set of pulleys, as
well as the larger 5-6 horsepower models. You will have
to choose from what you can find in the paper or at
tractor shows and swap meets. Of course there are other
good brands too.