Soil pH - Revision history

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2023-05-10T18:09:15Z

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← Older revision		Revision as of 14:09, 10 May 2023
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	====Alkaline soils====		====Alkaline soils====
	Alkaline soils have low infiltration capacity so rain water stagnates on the soil easily and it is harder for plants to get established [8]. Alkaline soils require irrigated water and good drainage. This soil is only used in agriculture for crops tolerant to surface water-logging such as grass and rice. The productivity of this soil is lower.		Alkaline soils have low infiltration capacity so rain water stagnates on the soil easily and it is harder for plants to get established [8]. Alkaline soils require irrigated water and good drainage. This soil is only used in [[agriculture]] for crops tolerant to surface water-logging such as grass and rice. The productivity of this soil is lower.

	== Water availability in relation to soil pH ==		== Water availability in relation to soil pH ==

Colincli: /* Alkaline soils */

2022-04-22T02:07:19Z

Alkaline soils

← Older revision		Revision as of 22:07, 21 April 2022
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	====Alkaline soils====		====Alkaline soils====
	Alkaline soils have low infiltration capacity so rain water stagnates on the soil easily and it is harder for plants to get established. Alkaline soils require irrigated water and good drainage. This soil is only used in agriculture for crops tolerant to surface water-logging such as grass and rice. The productivity of this soil is lower.		Alkaline soils have low infiltration capacity so rain water stagnates on the soil easily and it is harder for plants to get established [8]. Alkaline soils require irrigated water and good drainage. This soil is only used in agriculture for crops tolerant to surface water-logging such as grass and rice. The productivity of this soil is lower.

	== Water availability in relation to soil pH ==		== Water availability in relation to soil pH ==

Colincli: /* Water availability in relation to soil pH */

2022-04-22T02:06:39Z

Water availability in relation to soil pH

← Older revision		Revision as of 22:06, 21 April 2022
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	Strongly alkaline soils are sodic and have slow infiltration. Alkaline soils also have very poor available water capacity. Plant growth is restricted in wet conditions because aeration is poor when the soil is wet, and in dry conditions, water available to plants is rapidly depleted and the soils become hard.		Strongly alkaline soils are sodic and have slow infiltration. Alkaline soils also have very poor available water capacity. Plant growth is restricted in wet conditions because aeration is poor when the soil is wet, and in dry conditions, water available to plants is rapidly depleted and the soils become hard.

	Strongly acidic soils have strong aggregation, good internal drainage and good water-holding characteristics. For many plant species, aluminum toxicity severely limits root growth and moisture stress can occur when the soil is relatively moist.		Strongly acidic soils have strong aggregation, good internal drainage and good water-holding characteristics. For many plant species, aluminum toxicity severely limits root growth and moisture stress can occur when the soil is relatively moist [7].

	== Changing soil pH ==		== Changing soil pH ==

Colincli: /* Acidic soils */

2022-04-22T02:06:23Z

Acidic soils

← Older revision		Revision as of 22:06, 21 April 2022
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	====Acidic soils====		====Acidic soils====
	Plants grown in acidic soils can experience many stresses including aluminum, hydrogen, and/or manganese toxicity, as well as nutrient deficiencies of calcium and magnesium.		Plants grown in acidic soils can experience many stresses including aluminum, hydrogen, and/or manganese toxicity, as well as nutrient deficiencies of calcium and magnesium.
	Aluminum toxicity is the most widespread problem in acid soils. Aluminum is present in all soils to different degrees, dissolved aluminum is toxic to plants and aluminum is the most soluble at low pH, above a pH of 5 there is little aluminum soluble in most soils. Plants do not use aluminum as a nutrient and instead takes it up through osmosis through the [[plant roots]]. This uptake of aluminum has several effects on the growth of plants due to high concentrations of aluminum inhibiting root growth. Thus causing lateral roots and root tips become thickened, and roots lack fine branching.		Aluminum toxicity is the most widespread problem in acid soils. Aluminum is present in all soils to different degrees, dissolved aluminum is toxic to plants and aluminum is the most soluble at low pH, above a pH of 5 there is little aluminum soluble in most soils. Plants do not use aluminum as a nutrient and instead takes it up through osmosis through the [[plant roots]] [7]. This uptake of aluminum has several effects on the growth of plants due to high concentrations of aluminum inhibiting root growth. Thus causing lateral roots and root tips become thickened, and roots lack fine branching.

	====Alkaline soils====		====Alkaline soils====

Colincli at 01:45, 22 April 2022

2022-04-22T01:45:59Z

← Older revision		Revision as of 21:45, 21 April 2022
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	[[Soil]] pH is a measure of the acidity or basicity of a soil. Soil pH can be used as an important indicator to make both qualitative and quantitative analysis regarding soil characteristics. In soils, the pH is commonly measured as a slurry of soil mixed with water or a salt solution; the pH normally falls between 3 and 10, with 7 being neutral. Alkaline soils are basic soils with a pH above 7, while soils with a pH below 7 are acidic soils. Ultra-acidic soils which have a pH < 3.5 and very strongly alkaline soils which have a pH > 9 are rare, but can occur. The soil pH can affect many chemical processes and it specifically affects plant nutrient availability, influencing the chemical reactions they undergo. The best pH range for most plants is between 5.5 and 7.5, although many plants have adapted to survive at pH values outside this range.		[[Soil]] pH is a measure of the acidity or basicity of a soil. Soil pH can be used as an important indicator to make both qualitative and quantitative analysis regarding soil characteristics. In soils, the pH is commonly measured as a slurry of soil mixed with water or a salt solution; the pH normally falls between 3 and 10, with 7 being neutral. Alkaline soils are basic soils with a pH above 7, while soils with a pH below 7 are acidic soils. Ultra-acidic soils which have a pH < 3.5 and very strongly alkaline soils which have a pH > 9 are rare, but can occur. The soil pH can affect many chemical processes and it specifically affects plant nutrient availability, influencing the chemical reactions they undergo. The best pH range for most plants is between 5.5 and 7.5, although many plants have adapted to survive at pH values outside this range [4].

Colincli: /* Changing soil pH */

2022-04-22T01:06:40Z

Changing soil pH

← Older revision		Revision as of 21:06, 21 April 2022
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	== Changing soil pH ==		== Changing soil pH ==
	====Increasing pH of acidic soils====		====Increasing pH of acidic soils====
	Finely ground limestone is often applied to acid soils to increase soil pH in a process called liming. The amount of liming needed depends on the mesh size used and the buffering capacity of the soil. The finer the mesh, the faster it will react to soil acidity. The buffering capacity of a soil depends on its [[clay]] content and the amount of [[Organic Matter\|organic matter]]. Soils with a high buffering capacity will need a greater amount of liming to achieve an equivalent change in pH [9].		Finely ground limestone is often applied to acid soils to increase soil pH in a process called liming [6]. The amount of liming needed depends on the mesh size used and the buffering capacity of the soil. The finer the mesh, the faster it will react to soil acidity. The buffering capacity of a soil depends on its [[clay]] content and the amount of [[Organic Matter\|organic matter]]. Soils with a high buffering capacity will need a greater amount of liming to achieve an equivalent change in pH [9].

	====Decreasing pH of alkaline soils====		====Decreasing pH of alkaline soils====

Colincli: /* Soil pH ranges and classification */

2022-04-22T01:03:30Z

Soil pH ranges and classification

← Older revision		Revision as of 21:03, 21 April 2022
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			This classification of soil pH and classification is recognized and commonly used and recognized by many institutions but not limited to ESF [4].

	== Methods of determining pH in soil ==		== Methods of determining pH in soil ==

Colincli: /* Decreasing pH of alkaline soils */

2022-04-22T00:47:18Z

Decreasing pH of alkaline soils

← Older revision		Revision as of 20:47, 21 April 2022
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	====Decreasing pH of alkaline soils====		====Decreasing pH of alkaline soils====
	The pH level can be reduced by adding acidifying agents or acidic organic materials. Elemental sulfur has been used as it slowly oxidizes in soil to form sulfuric acid. Acidifying fertilizers such as ammonium sulfate, ammonium nitrate and urea can help reduce the pH of a soil because ammonium oxidizes to form nitric acid. Aluminum sulfate will also reduce the pH, but the aluminum is also detrimental to plant growth.		The pH level can be reduced by adding acidifying agents or acidic organic materials. Elemental sulfur has been used as it slowly oxidizes in soil to form sulfuric acid. Acidifying fertilizers such as ammonium sulfate, ammonium nitrate and urea can help reduce the pH of a soil because ammonium oxidizes to form nitric acid. Aluminum sulfate will also reduce the pH, but the aluminum is also detrimental to plant growth [1].

	== Gallery ==		== Gallery ==

Colincli: /* Increasing pH of acidic soils */

2022-04-22T00:46:58Z

Increasing pH of acidic soils

← Older revision		Revision as of 20:46, 21 April 2022
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	== Changing soil pH ==		== Changing soil pH ==
	====Increasing pH of acidic soils====		====Increasing pH of acidic soils====
	Finely ground limestone is often applied to acid soils to increase soil pH in a process called liming. The amount of liming needed depends on the mesh size used and the buffering capacity of the soil. The finer the mesh, the faster it will react to soil acidity. The buffering capacity of a soil depends on its [[clay]] content and the amount of [[Organic Matter\|organic matter]]. Soils with a high buffering capacity will need a greater amount of liming to achieve an equivalent change in pH.		Finely ground limestone is often applied to acid soils to increase soil pH in a process called liming. The amount of liming needed depends on the mesh size used and the buffering capacity of the soil. The finer the mesh, the faster it will react to soil acidity. The buffering capacity of a soil depends on its [[clay]] content and the amount of [[Organic Matter\|organic matter]]. Soils with a high buffering capacity will need a greater amount of liming to achieve an equivalent change in pH [9].

	====Decreasing pH of alkaline soils====		====Decreasing pH of alkaline soils====

Colincli: /* Decreasing pH of alkaline soils */

2022-04-22T00:00:17Z

Decreasing pH of alkaline soils

← Older revision		Revision as of 20:00, 21 April 2022
Line 79:		Line 79:

	====Decreasing pH of alkaline soils====		====Decreasing pH of alkaline soils====
	The pH level can be reduced by adding acidifying agents or acidic organic materials. Elemental sulfur has been used as it slowly oxidizes in soil to form sulfuric acid. Acidifying fertilizers such as ammonium sulfate, ammonium nitrate and urea can help reduce the pH of a soil because ammonium oxidizes to form nitric acid. Aluminum sulfate will also reduce the pH, but the aluminum is also detrimental to plant growth ~~[1]~~.		The pH level can be reduced by adding acidifying agents or acidic organic materials. Elemental sulfur has been used as it slowly oxidizes in soil to form sulfuric acid. Acidifying fertilizers such as ammonium sulfate, ammonium nitrate and urea can help reduce the pH of a soil because ammonium oxidizes to form nitric acid. Aluminum sulfate will also reduce the pH, but the aluminum is also detrimental to plant growth.

	== Gallery ==		== Gallery ==