Sustainable Soil Health

What is Soil Health

• ^{is an integral part of land management and may focus on differences in soil types and soil characteristics to define specific interventions that are aimed to enhance the soil quality for the land use selected}

• ^{is the capacity of soil to function as a vital living system, within ecosystem and land-use boundaries, to sustain plant and animal productivity, maintain or enhance water and air quality, and promote plant and animal health}

• ^{defined as the study of the organisms and environmental conditions that cause disease in plants, he interactions between these causal agents and the plant and the methods of managing or controlling plant disease.}

• the upper layer of earth in which plants grow, a black or dark brown material typically consisting of a mixture of organic remains, clay, and rock particles.

The following shows the characteristics of soil pedon, except?

• is the 3D unit that represents the entire soil body

• Group of freedom is called polypedons

• Describe the horizons from surface to bottom of excavation

• Basic soil sampling unit

There were some of the soil properties can be changed, except?

• Soil Structure

• Soil Organic Content

• Soil Texture

• Soil Bulk Density

Texture is based on

• Dispersing and percentage of the soil mineral fraction

• Coarseness of fineness of soil mineral fraction

• Roughness and softness of soil mineral fraction

• Three dimensional arrangement of mineral particle and organic matter

Among the few ways of reducing tillage, which one was used to cuts down erosion?

• permanent bed

• deep zone-tillage

• strip tillage

• ridge tillage

Soil Microbial Biomass stabilized when microbial exopolysaccharides bind to clays to facilitate aggregates formation and release of such inorganic nutrients such as

• Ammonium, Phosphate, Sulphate

• Magnesium, Calcium

• Protein, Carbohydrates

• Iron, Copper, Sodium

Which of the following soil classification is dominantly organic?

• Gelisols

• Histosols

• Incepticols

• Mollisols

How many percent of the world's agricultural land has not been degraded by wind or soil erosion?

• 38%

• 50%

• 36%

• 62%

What are the hormones release during plant growth in PGPR process?

• Acc-deaminase

• Auxin

• Ethylene

• Gibberellin

GRC : living organism helps in soil formation as follows, except?

• Add humus in soil

• Degrade the soil quality

• Act as decomposer

• Add nutrient to the soil