Soil dating


However, on highly alkaline soils even some Iowa native plants grow poorly.

These include pin oak, river birch, and white pine.

The standard measurement of alkalinity and acidity is known as p H. A p H of 7 is neutral, which is neither acid nor alkaline. A p H of 5.5 is 10 times more acidic than a p H of 6.5.

Conversely, a p H of 8.5 is 10 times more alkaline than a p H of 7.5. The soil p H is important because it affects the availability of nutrients in the soil.

But before attempting to raise or lower your soil's p H, you should first conduct a soil test to determine your current soil p H.

Consequently, most horticultural plants grow best in soils with a p H between 6 (slightly acid) and 7.5 (slightly alkaline). If your soil is not, then you will need to make a choice.Either choose plants adapted to your soil's p H or alter your soil's p H to fit the plants.


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