Daily Dosage - Soil Science - Important One liner

Soil science - Important One Liner

• Inherent capacity of soil to supply adequate nutrients for plant growth is called - Soil fertility 

• Capacity of soil to produce in terms of yields is called - Soil Productivity 

• Soil fertility+ management includes in - Soil productivity 

• Relative proportion of soil particles is called - Soil texture 

• The arrangement of soil particles is called - Soil structure 

• Size of Sand Particle - 0.2 to 0.02 

•  Size of Silt Particle - 0.02 to 0.002 

• Size of Clay Particle - < 0.002 

•  Size of gravel - > 2mm 

• Which structure is better for crop cultivation - Crumby 

• Pore space is occupied by - water and rain 

• Total pore space is more in - clay soil (50-60%)  

• Total pore space is low in - sand soil (30-40%) 

• Weight of soil per unit volume is called - Bull density 

• The Bulk density of common soil is - 1.6g/cm3 

• Particle density is also known as - true density 

• Weight of solid portion of soil per unit volume is called – Particle density 

• The Particle density of common soil is - 2.6 g/cm3 

• CO2 concentration in soil air is - over 0.3%  

• CO2 concentration in soil air is ……..time higher than atmosphere - 10 

• Well decomposed organic matter is called as - Humus 

• Humus is also known as - Lingo protein 

• Carbon: Nitrogen (C:N) ratio for saw dust 400:1 

• C:N ratio for Legume – 20- 30:1 

• C:N ratio for FYM -10:1 

• The soil moisture held by the soil against gravitation at energy status of -0.1 to 0.33 bar is called - Field Capacity 

• The soil moisture held at energy status of - 0.33 bar to –15 bar  is called - Available soil moisture 

• Urea is a - Organic fertilizer 

• CAN (calcium ammonium nitrate) is a - Neutral fertilizer 

• Recommended ratio of NPK for cereal crops is - 4:2:1