How we farm-- our agricultural practices.
Of course you
know we have always followed "organic" practices, since long before
such were legally defined with the Organic Foods Production Act of 1990 and the
ensuing Program Standards. These spell out an organic production system based
on conservation and improvement of the
soil and critically--the organic matter.
Both a long range and an annual plan are required. All products used in production need to
follow organic guidelines and in many cases are tested and independently
approved; field histories are required
for three prior years, including crops planted, amendments used... when and in
what quantities. Generally, most amendments
and fertilizers need to be naturally occuring and not chemically altered or
synthetic. When farm produce is claimed
to be organic, independent certification is required unless the farm grosses
under $5,000. We have been certified
organic since 1990.
For many
years, we followed what is most common among organic farmers in that we used
composted animal manures and other composted organic waste as the basis of our
fertility and soil improvement program.
About 5 years ago, soil tests were starting to show a pattern of high
levels of major crop nutrients because of many years of composts made with
manure. Our soils had improved (!)so
much that just about all we now need is nitrogen--which tends to be used up
annually. We had always used nitrogen
fixing alfalfa as part of our rotation, and rye/vetch cover crops over winters.
Two years ago we completely went off the
use of manures and composts containing manure.
We have transitioned to using nitrogen fixing crops such as alfalfa,
clover, vetch, and peas to provide our nitrogen. Symbiotic
bacteria colonizing the root systems of these plants takes nitrogen from
the air and fixes it in the soil.
We've always
tried to maximize the use of that great engine which energizes our planet--the
sun--by keeping the ground planted at all times in photosynthesizing
plants. Thus as soon as a crop is done
in the fall, we seed a cover crop which continues to grow in the fall, in the
spring, and even in the dead of winter on any day the temperature will
allow. Having a thriving root system in
place also forestalls erosion. Likewise
we will often interseed lower growing plants like sweet clover between the rows
of growing crops.
Continuing to
experiment this year with a method to reduce tillage and erosion (and minimize
work) we roll-killed a dense growing crop of nitrogen fixing hairy vetch, and
planted a crop of winter squash in the heavily mulched field. The mulch will also conserve moisture.
We've also
begun using a mychorrhizal innoculant. Mychorrhizae are symbiotic
fungi which actually penetrate into the root cells of plants and forage the
surrounding soil for nutrients and water which then they provide to the
plant. In return they get sugars. It's kind of like multiplying the roots
system of the plant. Of course it's
nothing that doesn't already occur widely in the plant world anyway--just new
to the human plant world of agriculture.
People often
ask, what do we do for "bugs" .
There's a whole menagerie of methods and strategies. We'll describe a few. Three of our most serious apple pests are
moths--coddling moth, oriental fruit moth, and the tufted apple bud moth. In the early spring we put out thousands of
plastic twist ties impregnated with the scent of the females of these
pests. So when the males are searching
for a mate, they smell them everywhere but can't find one. Thus there are no fertile eggs and no worms
of these species. There's a
bacteria--bacillus thurengiensis--which we spray for leaf eating catepillars,
like the cabbage looper, which is deadly to them but totally harmless to
us. Something we're quite optimistic
about this season is a new product which is an extract of giant knotweed which
induces an immune system response in a plant to resist fungal and bacterial
infections. There's been evidence this
is has been actually effective in controlling the dreaded phytophthora
infestans--late blight in tomatoes and potato blight in spuds. Another remarkable new biological spray is
produced through fermentation of a microorganism--Actinomycetes spinosa. This is highly toxic when ingested by a
variety of pests. Under organic management
we also use a number of mined materials like sulfur, phosphorus, calcium (in
many forms from limestone to aragonite which is seashells), copper, lignite (a
source of humate), and boron as well as
seaweeds and fish emulsion (remember those grade-school images of native
Americans throwing a little fish in each hole with a few corn seeds?) That's a
brief snapshot of an ever evolving process.
We try always
to learn to cooperate with nature to produce food while conserving or improving
the resources we've been blessed with.
Life, health, nutrition, cooperation, and balance are the keys.