IDeX - Food - Sucessive Perennial No-Till

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Oct072009

Sucessive Perennial No-Till

Wednesday, October 7, 2009 at 2:55PM

Organic no-till production utilizes a mulch layer made from a rolled orchopped cover crop, through which the crop is planted or transplanted.Despite being titled no-till the cover crop does need yearly planting and tobe rolled, and will need to be tilled every few years to compensate forincreased surface residue and pest issues.To reduce further the amount of field work required I came up with the ideaof utilizing perennial crops and early maturing annuals such as subterraneanclover or alfalfa in the place of annual crops for the rolled mulch. Theproblem with these systems is the eventual overtake of fields by the covercrops from self seeding and yearly growth. To compensate for this Idesigned a system which mimics the natural systems of succession of plantand animal types over time.I call this system perennial successive no-till. As fields are taken overby mulch crops they are allow to succeed into a pasture type setting bothproviding feed and space for livestock and giving the fields a rest periodfor a number of years to regain fertility and grow soil structure andorganic matter. After 3-4 years the system is brought back into annualproduction by using highly competitive winter annuals and prescribedovergrazing to outcompete the perennials and annual reseeding crops.

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