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Issue 66 Amendment Calculator
One solution for clay soil is to build a better bed on top of it! In the "Quick Fix for Poor Soil" story in issue 66, I shared an easy way to build a berm to rise above problem soil.

 


Soils, Amendments & Composting
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amendment
Alteration or change, especially for the better, as when adding a soil amendment.
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Soil amendments are materials which are worked into the soil to enhance the soil's properties. Examples would include organic matter such as compost, manure, bone meal or leaf mold, as well as synthetic fertilizers.

Organic amendments break apart tight clays and hold water and nutrients in loose sands. Add a two inch layer over the surface of the soil - the equivalent of four cubic yards per thousand square feet.

Organic Soil Amendments
Most organic fertilizers release their nutrients slowly over many months, so applying them in the fall helps ensure they'll be available to your plants next spring.

Manures and Soil Amendments
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Amendments
Amendments are necessary because clay soils tend to hold moisture too well and are also quickly and easily compacted, especially during wet weather.

Amendment-Any material, such as lime, gypsum, compost, sawdust, or synthetic conditioner, that is worked into the soil to make it more productive.

Amendments to Your Soil Constitution
Amending your garden soil requires some digging, but it's a worthwhile (and necessary) task to ensure a healthy garden and harvest.

amendments
Things that you add to the soil in order to improve it for plant growth.
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AMENDMENT - Usually referring to some form of organic material being added to the soil for the purpose of improvement.

Add amendments. Adjust the soil pH -- its measure of acidity or alkalinity -- by adding ground limestone or sulfur as recommended by the soil test results.

Soil amendment. Use freshly cut comfrey leaves (but not the flowering stems in this case—they can root) as fertilizer in planting holes. The leaves break down rapidly and provide nutrients right at the roots.

Soil Amendments
A laboratory soil test will show the quantity of basic plant macro- and micro-nutrients, the organic matter content and the soil pH.

Soil Amendment: Any material added to the soil to improve its quality, such as structure, drainage, aeration and water retention.
Suckers: A shoot that sprouts from the roots or trunk of a tree, shrub or bush and drains its energy.

Soil Amendment: Any material added to a soil to improve its physical properties, such as water retention, drainage, aeration and structure.

Soil Amendment
We have already talked about how compost helps soil, especially sandy and clay soils. When starting a new garden soil amending is recommended before you plant.

Soil Amendments
Many areas of the country have acidic soils. If it is determined that your soil is acidic, add lime, gypsum or dolomite to loosen the soil and reduce acidity.

Soil, Amendments and Water
Bearded iris grow best in soil that drains well and is rich in organic matter, such as compost, aged manure and peat. The University of Minnesota says root rot can occur if soil remains too moist.

Acidic Amendments
Plants that require acidic soil, such as ferns, azaleas, and rhododendrons, benefit from being mulched and having their planting holes amended with acidifying humus, such as peat moss, pine needles, or oak leaves.

AMENDMENT: Adding additional ingredients to the soil. Usually they are described as soil amendments. Leaf mold, compost, peat moss, and sand can all be used as soil amendments.

Amendments to Change pH and Nutrient Levels
The correct soil pH is essential for optimum plant growth. Lime and sulfur are common amendments used to balance soil pH.

Soil amendments such as compost can be bought by the bag or sometimes by the truckload. Work the amendments into the top six inches of soil along with a general purpose fertilizer such as 10-20-10.

Soil amendments adjust the pH (soil acidity or alkalinity level) and supply calcium (Ca) and magnesium (Mg) in the soil. Most home garden plants grow best in moderately acid soil. Soils with a pH from 5.5-7.

-- as an amendment to loosen clay soil (along with compost); or to mix with sphagnum peat moss to create potting or starting medium.

Once the amendments have been thoroughly mixed in, use a landscape rake to smooth out the soil and fine-tune the grade.
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The best amendment for your soil is one you can make yourself: compost. If you don't already have a compost pile, start one now.
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soil amendments
organic soil amendments
Definition: Blood meal is dried, powdered blood that is used as a high-nitrogen organic fertilizer. It is a by-product of the meat processing industry.

Organic soil amendments and conditioners can renew the life of your soil without adding unwanted chemicals. Nitrogen, Phosphorus, and Potassium are the basic providers of nutrients in the soil. Trace minerals provide the rest.

The amount of amendment to be applied should be determined using the existing pH and soil type. Sandy soil will require a smaller amount of amendment than clay soils.

By working soil amendments such as compost and manure into the garden and feeding plants with organic fertilizers you will build the soil and replenish spent nutrients.

An organic soil amendment resulting from the decomposition of organic matter.
conifer
A cone bearing tree with tiny needlelike leaves.

Also called soil amendments, soil conditioners added to soil improve plant growth and overall health. Soil conditioners are not fertilizers, but they do improve soil's drainage and some will also increase the water holding capacity of your soil.

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If you need to add amendments to your soil to loosen it, I recommend a mixture of aged sawdust and sand in equal parts.

By testing your soil, you are determining the pH balance, and how much nitrogen, phosphorus, inorganic amendments, and Humus (organic amendments) you need to add to your soil.

Start a compost pile to convert yard waste into a wonderful soil amendment. Gather pest-free plant debris, herbicide-free grass clippings, fall leaves and noninvasive weeds before they go to seed.

While compost is a wonderful soil amendment for trees, it cannot be worked into the soil without damaging the roots of established trees. That's where compost tea comes in.

Let's take the next two points together; soil amendments and tilling. First of all, any time you break up the soil, you begin to break it into smaller and smaller pieces.

Initial tilling, to a depth of at least 5 cm (2 inches), should be completed prior to adding any topsoil or soil amendments.

Plants grow very quickly in southern climes, and water is quickly becoming one of the most important soil amendments in the garden.

Basically, this means you can now remove the grass and/or weeds, add soil amendments, and begin planting. This step covers the removal of grass and weeds.

When finished, add soil amendments. Depending on the type of soil in your garden, you'll want to add peat moss, sand, compost, manure, or other materials to improve the texture and drainage.

manure - Organic matter, excreted by animals, which is used as a gardening soil amendment and fertilizer.
meristem - Any growing point of both root and stem on a plant, where active cell division is taking place.

Test your soil for pH to see if any amendments are necessary.
A general rule of thumb is to add 4 lbs. of lime per 100 sq. ft. of garden for every pH point below 6.5, or 1 lb. of sulfur per 100 sq. ft. for every pH point above 7.5.

Compost is used as a soil amendment rather than a fertilizer because its nutrients become available slowly.

Many gardeners throw away the rocky, poor soil, and backfill with potting soil or other rich amendment. That is not going to help the plant at all.

Whenever you dig amendment into the soil or add mulch to the surface, you're making deposits. Organic amendments â€- compost and rotted manure, for example â€- fatten up the soil bank.

Manure is one of the best soil amendments you can use. Adding it to your vegetable garden is a sure-fire way to get great, tasty vegetables. Its an organic fertilizer.

A highly water-retentive, spongy organic soil amendment, peat moss is the partially decomposed remains of any of several mosses. It is somewhat acid in reaction, adding to soil acidity.

Finished compost can be used as a soil amendment, mulch, side dressing and even a compost tea. It is good for lawns, vegetable gardens, trees, shrubs, annuals, perennials and even potted plants and house plants.

Having a soil test done prior to planting can be valuable in understanding soil condition and providing recommendations of what amendments can be added to obtain the optimum nutrient levels and pH range.

These experts can also help you choose the right fertilizer, compost, and other "soil amendments," and they can advise you about aerating if your soil is compacted.

(You can have your soil tested by your local extension office to determine what amendments may be missing.) Prepare your beds by turning over and working the soil approximately 8 to 10 inches deep, adding organic matter as needed.

The sandy soil also receives very little amendment. "If you amend, you have to amend so much to make a difference. With so many gardens, I couldn't begin to.

The process of decomposing organic matter and using it as organic fertilizer and soil amendments.
Compost Bin
A structure to hold the compost pile.

Coping with Bad Dirt
Create Rich Soil for Your Garden
Do a Soil Test
Evaluate Your Soil
Give Your Soil What It Needs
Soil Amendments & Nutrients
Top Plants That Thrive in Clay ...

Peat - Partially degraded vegetable matter found in marshy areas. Peat is commonly used as asoil amendment.

MANURE -- An organic material excreted by animals (usually from steer is sold commonly) this is used as a fertilizer and an amendment to enrich the soil.

See also: Soil, Plant, Water, Organic, Compost