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Soil pH is a key characteristic that can be used to make informative analysis both qualitative and quantitatively regarding soil characteristics. [ 1 ] pH is defined as the negative logarithm (base 10) of the activity of hydronium ions (H+ or, more precisely, H3O+aq) in a solution.
Phosphorus deficiency is a plant disorder associated with insufficient supply of phosphorus. Phosphorus refers here to salts of phosphates (PO3− 4), monohydrogen phosphate (HPO2− 4), and dihydrogen phosphate (H2PO− 4). These anions readily interconvert, and the predominant species is determined by the pH of the solution or soil.
Potassium deficiency, also known as potash deficiency, is a plant disorder that is most common on light, sandy soils, because potassium ions (K +) are highly soluble and will easily leach from soils without colloids. [1] Potassium deficiency is also common in chalky or peaty soils with a low clay content. It is also found on heavy clays with a ...
Manganese (Mn) deficiency is a plant disorder that is often confused with, and occurs with, iron deficiency. Most common in poorly drained soils, also where organic matter levels are high. Manganese may be unavailable to plants where pH is high. Affected plants include onion, apple, peas, French beans, cherry and raspberry, and symptoms include ...
A pH close to 6.5 is recommended for vegetable gardens. A soil test can relay that information, and your local Extension office can tell you the necessary amendments.
Iron (Fe) deficiency is a plant disorder also known as "lime-induced chlorosis ". It can be confused with manganese deficiency. If soil iron concentration is high, in spite of this it can become unavailable for absorption if soil pH is higher than 6.5. [1] Excess of elements such as manganese in the soil can interfere with plant iron uptake ...