Effects of Salt-Affected Soils on Plants Growth

Effects of Salt-Affected Soils on Plants Growth General symptoms of salinity in plants are retarded growth and smaller Plants fewer and smaller leaves. Stunted leaves are generally darker green than normal some plants leaf succulence increases. The other common effects are: Osmotic Effect Increase in salinity results in reduction of the amount of water available to the waté This results ...

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Soil Salinity

Soil Salinity Soil salinity refers to presence of salts in root zone of the soil. It adversely affects the growth of plants. General symptoms of salinity in plants are retarded growth and plants with fewer and smaller leaves that are darker green than normal leaves. Salt-Affected Soils The soils in which concentration of salts is very high are called salt-affected ...

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Water Logging

Water Logging The soils whose surface layers are saturated with water are termed waterlogged soils and the phenomenon of rise of water table to soil surface is termed water logging. Causes of Water Logging The followings are the causes of waterlogging in Pakistan: Seepage of Water from Canal System The main source of waterlogging in Pakistan is seepage of water ...

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Soils of Pakistan

Soils of Pakistan The soils in Pakistan are affected by arid climate, therefore belong to dry group, rich in basic having a high calcium carbonate content and poor in nitrogenous matter. They vary in color from reddish brown in north to red or gray in south. The soils at the foot of the mountains are sandy but become finer towards ...

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Soil Organisms & Their Importance

Soil Organisms & Their Importance Plants and animal residues deposited on the surface of the soil are decomposed by organisms (flora and fauns) present in the soil. These organisms are called soil organisms. This decomposition results in release of carbon dioxide, water, essential elements of humus. Most of the soil organisms belong to the plant life (flora) which includes soil ...

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Organic Matter of Soil & Humus

Organic Matter of Soil & Humus All materials of plant, animal, or microbial origin, produced in the soil or added to it are termed as soil organic matter. The soils whose properties are dominated by organic matter are called organic soils. The primary source of soil organic matter is plant tissue. The fallen branches, twigs, leaves and roots of trees, ...

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Structure of Soil

Structure of Soil The grouping or arrangement of soil particles is called soil structure. The smaller soil particles aggregate and colloids form coatings over these larger grains, binding them together into structural units of various sizes called peds or fragments, except for soils where the texture is uniformly coarse. Soil structure describes arrangement of the primary soil separates (sand. silt ...

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Texture of Soil

Texture of Soil To study the mineral particles of a soil, scientists separate them into groups according to their size. These groups are called soil separates or fractions. The relative proportions of different sized Soil separates are called soil texture. Soil Separates A number of different classifications have been proposed to determine the particle size distribution. The classification established by ...

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Weathering

Weathering The process in which massive consolidated rocks are broken down into fine, smaller particles is termed weathering. It is combination of destruction and synthesis processes. The rocks are first broken into smaller rocks and then into minerals which they are composed (primary minerals) such as feldspars. The rock fragments and minerals are attacked by chemical forces which release soluble ...

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Soil Factor – Parent Material

Soil Factor – Parent Material The unconsolidated mass from the soils are formed is the parent material. It constitutes the basic mineral framework of most soils and consists of small fragments of inorganic matter which has been derived from solid rock by mechanical or chemical types of weathering, Depending on the mode of origin, most parent materials can be classified ...

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