Home Agriculture Farming What is soil pH and its importance to plants (Part 2)

What is soil pH and its importance to plants (Part 2)

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What is soil pH and its importance to plants (Part 3)

What is soil pH and how important is it for plants?

What is the pH of the soil and the importance of pH. Understand What is the pH of the soil? as well asThe importance of pH for plants help us choose the right plants for that soil, or can help them improve soil quality.

What factors affect soil pH?

Read part 1: What is soil pH and its importance to plants (Part 1)

Many factors can affect soil pH. The most common factor is tweather and climate, pH of irrigation water, type fertilizer use. You can rely on the plants that grow in the soil you are assessing to estimate the pH of that soil, called indicator trees, for example:

  • In acidic soil, there are tea grass, reed grass, grass chit, etc.
  • Acidic soil: including grass, reed, sedge grass, tube grass, sweet energy …

How does pH change affect plants?

  • Low pH causes precipitation, low fertilizer absorption efficiency, slows plant growth.
  • The tree is difficult to bear fruit due to an imbalance of mineral elements.
  • Acid/alkaline environment inhibits the growth of young roots, harmful fungi thrive, inhibits beneficial fungi in the soil.
  • Fertilizer precipitation causes clayey phenomenon, low oxygen coefficient in soil.
  • Earthworms do not grow when pH is low or high.

Improve soil pH

What is soil pH and how important is it for plants?In the past, our grandparents used to have a saying “first in the country, second in division, three needs, four varieties” to say that farming requires four important factors that need to be good, but there are still many limitations because the crop is still subject to a lot of stress. effects of natural conditions. Today, with the development of modern agriculture, which creates outstanding productivity, no longer depends on natural conditions affecting from the outside, everything is proactive and controlled according to human will. for maximum crop yield.

However, the consequence of that modernity is that the soil has been forced to die, draining nutrients and now the soil is no different.”prices can“just let the plant take root and live off of it inorganic fertilizers. Up to now, the old grandparents’ saying “one country, second part, three needs, four breeds” is still true. Water and fertilizers are two common factors that actually affect pH, from a soil with a good pH of 6.5-7 good for the root system of plants, but when we water with low pH on the If that land and monoculture using inorganic fertilizers, that land will definitely become dead land (bottle soil) and acidic soil no longer has ideal conditions for plants to grow and develop well.

pH affects the easily digestible phosphorus in the soil, if the soil is too acidic, phosphorus reacts with iron and aluminum, making phosphorus no longer in a readily available form for plants to absorb. But if the soil is too alkaline, the phosphorus reacts with the calcium and also becomes indigestible. Phosphorus is in its most readily available form for plants when the soil in the Goldilocks area is acidic (Andrew Margenot, University of Illinois).

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There are many ways to make phosphorus easier to digest for plants to absorb such as lime application to reduce soil acidity. That can make phosphorus in indigestible form more digestible form, if the soil is too alkaline add iron sulphate, sulfuric acid or calcium chloride, this is the main solution for large scale and concentrated agriculture, however fertilizing Lime or calcium chloride is not a sustainable solution. And the current safe solution is Add organic matter soil in order to stabilize the pH and literally restore the original life to the soil.

The process of organic decomposition helps to stabilize the pH in the soil; Organic acids together with CO2 release dissolved minerals and make them available to plants. When the soil pH is stable, the activity of pathogenic fungi is limited (harmful fungi are often active at low soil pH). Humus (decomposed organic matter) provides a storehouse for exchangeable and useful cations, and humus increases the buffering capacity of the soil. Nutrients will be retained by humus and released slowly for the plants to use, thereby helping to limit nutrient loss. Basically, when the ground is improved with organic matter, maintaining the living activities of microorganism Continuously working by stabilizing pH will give many good signals and eventually the plant will grow strongly, increase yield and sustainably.

Thank you for reading the blog series “What is soil pH and how important is it for plants?

Read part 3: What is soil pH and its importance to plants (Part 3)

Author: Nguyen Minh Triet

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