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Monday, November 7, 2011

Healthy Soil is a Balancing Act

The health and beauty of a plant or the productivity of a crop is directly related to the health and vitality of the soil in which it grows.  When the pH is wrong, nothing works right - not fertilizers, not weed killers, and especially not the biological components within the soil. When the Soil Organic Matter (SOM) content is low, the soil is unproductive, and crops, trees or turf lack the energy sources to help them grow.
When soluble salts and chlorides are too high, the microbes that live in the soil and help aerate and digest dead plant material (turning them into organic material) are killed, thereby increasing soil compaction. When the soil is compacted, not enough air, water or nutrients can enter the root zone, so the plants suffer greatly.
Is your lawn telling you something?
Our lawns are a great barometer of soil health. They can’t lie, so if something’s wrong with the soil beneath your grass, it shows up in some not so subtle ways.
Symptoms of Sick Soil:
·        Bare Patches – if grass won’t/can’t grow, soil is definitely not well
·        Shallow Root System – anything less than 6 inches
·        Compacted Soil – soil probe penetration less than 6 inches
·        Puddling – water quickly runs off or pools in low areas rather than soaking into the soil
·        Disease Prone – annual outbreaks of diseases; either the same disease during the same time period each year or different diseases through the season.
·        Insect Infestations – like diseases, insect problems are many times related to thatch, but can also be a sign of low levels of soil nutrients.
·        Thatch – dead grass stems, blades and roots that are not breaking down into organic matter, but accumulating on top of the soil and creating conditions that favor disease and insect problems, as well as restricting moisture from getting into the soil.
·        Weeds – especially if there are a wide variety of weed types.

What causes ‘Sick Soil’?
When nutrients are out of balance with each other or just not available for the plant’s use, plants become unhealthy and are more susceptible to disease and insect attacks.
When secondary & micro nutrients are in short supply, plants become weak and are damaged more easily by wear & tear, drought conditions and insect/disease problems.  
Soil in very poor condition may need to undergo a comprehensive soil test to find out what unhealthy conditions exist and what can be done to fix the problem.
If corrections are not made, lawns may develop thatch, weed, insect and disease problems. This means added chemical usage, mechanical intervention and unnecessary costs.
How to remedy sick soil?
Adding Organic Matter in the form of compost will raise, or help maintain, SOM to the 5% level. Top dressing lawns or amending soil with Harvest Blend Compost will correct many symptoms of unhealthy soil by:
1.      Improving soil structure, porosity and density to ensure a healthier root environment.
2.      Infiltrating heavy soils thereby reducing erosion.
3.      Increasing water holding capacity of soil so that water is used more efficiently.
4.      Stabilizing pH and improving the soil's ability to hold nutrients.
5.      Supplying valuable microbes, micro and macronutrients and organic matter to the soil environment.
6.      Helping to suppress soil-borne plant pathogens.
7.      Binding and degrading specific pollutants.

When soil is healthy, all plant life is healthier and more productive; better able to survive weather and environmental stresses, and insect/disease attacks.
The US Composting Council is promoting healthy soil through their “Strive for 5%” campaign, educating the public on the importance of building Soil Organic Matter to 5%. Click here for details

2 comments:

Unknown said...

Great article on the importance of soil organic matter! Here in the Pacific Northwest I like to add compost to my lawn and mulch my trees and shrubs in the fall, and I like to mix compost into my veggie and flower beds every spring.

Got Compost said...

Thanks, Kate. Lawn top dressing seems to have a tough time becoming recognized for all the benefits it offers soils/lawns. So glad you're using compost to add SOM to your landscape. Keep up the great work!