Tag: soil - properties

• Alkaline soils are clay soils with high pH, a poor soil structure and a low infiltration capacity.pH of alkaline soil is  > 8.5, 
• The principal cation in alkaline soil is Ca2+ because alkaline soils are primarily caused by a calcium carbonate-rich parent material weathering (developing) in an arid or dry environment.
  
• Hence the principal cation in alkaline soil is  Ca2+.
  
• So, the correct answer is 'Ca2+'.

Soil salinity can be measured by conductivity meter, it is a device which measures electrical conductivity in a solution due to presence of salts or impurities

• Irrigation is the application of controlled amounts of water to plants at needed intervals. 
  
• Prolonged liberal irrigation of agricultural fields is likely to create a problem of salinity, loss of nutrients from the soil. as more amount of water enters through the xylem vessels of the plants the soil becomes waterlogged, vegetations and crop die due to insufficient supply of oxygen.
• Hence Prolonged liberal irrigation of agricultural fields is likely to create a problem of salinity.
• So, the correct answer is 'Salinity'.

Forest Biomes represent the largest and most ecologically complex systems.  They contain a wide assortment of trees, plants, mammals, reptiles, amphibians, invertebrates, insects and micro-organisms which vary depending on the zone's climates.  Sadly, boreal and rainforest biomes are being cut down at an alarming rate, with hundreds of species of plants and animals disappearing from the planet on a daily basis. In forests temperature is generally lower in summer and higher in winter. The days are cooler and nights are warmer than in the surroundings. The floor of the forest is carpeted with lichens and mosses. Moisture content of the soil remains stable for longer periods because of absence of evaporation.