Soil Science Important One liner for all Competitive Exams
- Wheat is an indicator plant for copper.
- The density of soil water is maximum at 40c.
- Organic carbon content in soil average 0.5- 0.7%
- Available nitrogen-(240-280kg/ha).
- Available phosphorus- (11-22 kg/ha).
- Available potassium- (110-280 kg/ha).
- Available sulphur-(6-16 ppm).
- Enrichment of water bodies by nutrients and consequent bloom of algal and other aquatic plants is termed as ‘Eutrophication’.
- Particle density of Alluvial soil is 2.55 gm/cm3.
- Macro and Micro spore ratio should be 1:1 in soil.
- Fertilizer control order 1985.
Marshy soil are generally deficient of Zn.
- Downward movement of nutrients and salts from the root zone with water is known as ‘Leaching’.
- A vertical section of soil through all its horizons is called ‘Soil Profile’.
- ‘A’ horizon is also known as Fertile horizon.
The smallest volume of soil is called as pedon.
- A+B horizons are together called
as ‘Solum’.
- A+B+C horizons are together called
as ‘Regolith’.
- The arrangement of primary particles of the soil is known as ‘Soil Structure’.
- The relative proportion of sand, silt and clay particles
is termed as ‘Soil Texture’.
- Newly formed alluvial
soil is called as ‘Khadar’.
- Old alluvial soil is termed as ‘Bhangar’.
- Soil moisture content
is determined by ‘Tensiometer’.
- A mass of rotted organic matter
made from waste is called as ‘Compost’.
- Peaty soils are generally deficient of Cu