How Does pH Affect Plants?

As all plants need different levels to grow properly, it is important that the pH of the soil reflects its acidity. The acidity of the soil also affects the dispersion of other important nutrients in the soil and imbalances can hamper the ability of plants to absorb them. In particular, when planting the garden for the first time in a new soil with unknown acidity it is important to test the pH. This can be done by using the home kit or by sending soil samples to your local country.

When planning a new garden, it is important to know whether your soil is suitable for the type of plants you plan to plant. Soil pH is assessed on a scale of 5 to 0, most plants function best in the soil and are tested in the neutral range of 0 to 0. Growth may still occur if the soil test is above or below this value, but plants may experience adverse development and the resulting imbalance

The word "pH" represents an element that promotes the formation of potential hydrogen, acid in the soil. A rating much lower than 7 indicates very acidic soil, while much higher measurements reflect higher alkalinity sometimes called sweetness. In neutral soils suitable for the most commonly cultivated plants, corrections like lime are generally not required. The main effects of extreme pH levels include the presence of nutrient availability gaps and the presence of highly concentrated minerals harmful to plants. In very alkaline soils, certain micronutrients such as zinc and copper can not be used chemically for plants. In very acidic soil, major nutrients such as calcium, magnesium and phosphorus are not absorbed, but others reach toxicity level.

Depending on the acidity of the soil, plants absorb important nutrients with varying levels of activity. Nitrogen, potassium, sulfur, magnesium and iron are available in a wider range of acidity, whereas the availability of phosphorus, manganese, copper, boron and zinc decreases with increasing alkalinity. Molybdenum is a trace nutrient, the effect increases as the soil's alkalinity level rises.

In addition to influencing how nutrients are distributed to growing plants, the pH level also affects the microbial activity of organic decomposition. Neutral pH is ideal for microbial action, causing chemical changes in the soil making nitrogen, sulfur and phosphorus more accessible. Even if the pH is too high or too low, changing the essential ingredients of pesticides or weakening the ability to kill unnecessary insects may hinder the effectiveness of pesticides. In order to correct very acidic soil it is usually necessary to add lime to the soil a few weeks before planting and usually add plaster to correct alkaline soil.

Rachel Lovejoy has written since 1990 as a professional and now has a short article on Amazon's Kindle, a column titled "From the Urban Wilderness" by Journal Tribune currently in Biddeford, Maine. Lovejoy graduated from Southern Main University in 1996 with a bachelor 's degree in English literature.

The availability of some phytonutrients is greatly influenced by the soil pH. "Ideal" soil pH is close to neutrality, neutral soil is considered to range from slightly acidic pH of 6.5 to slightly alkaline pH of 7.5. Most phytonutrients are optimally available for plants in the pH range of 6.5 to 7.5 and furthermore this pH range is generally determined to be very compatible with plant root growth There. Nitrogen (N), potassium (K) and sulfide (S) are major phytonutrients and their soil pH appears to be less influential than many others, but it still has some impact. However, phosphorus (P) is directly affected. For example, at alkaline pH values ​​above pH 7.5, phosphate tends to react quickly with calcium (Ca) and magnesium (Mg) to form compounds with low solubility. At acidic pH, phosphate reacts with aluminum (Al) and iron (Fe) to form compounds with lower solubility.

Soil pH affects plant growth in various ways. Bacteria that release nitrogen by changing organic matter and some fertilizers will work optimally in the pH range of 5.5 - 7.0 and make them optimal pH range. Phytonutrients leaching from the soil at pH values ​​below 5.5 are faster than those ranging from 5.5 to 7.0. In some mineral soils, aluminum can dissolve at pH levels below 5.0, which is toxic to plant growth. The pH of the soil may also affect the availability of phytonutrients. Plants are best suited for optimum nutrients ranging from 5.5 to 7.0. PH also affects the structure of the soil in the clay, in particular. In the best range, the clay is granular and easy to use. However, if the soil is extremely acidic or alkaline clay, the soil tends to become sticky and difficult to cultivate.