Description : The most dominant mineral on earth crust
Last Answer : Ans. Feldspar (48%)
Description : Black soil belongs the soil order
Last Answer : Ans. Vertisol
Description : With reference to India, which one of the following statements is not correct? [IAS 2002] (a) About one-third of the area of the country records more than 750 millimetres of annual rainfall. (b ... the country (d) The mountain areas account for about thirty percent of the surface area of the country
Last Answer : Ans: (d)
Description : The most important soil group of India
Last Answer : Ans. Alluvial Soils
Description : Commonly followed soil particle classified in India is
Last Answer : Ans. International Society of Soil Science (ISSS)
Description : Most dominant factor influencing weed composition in a field is a). Soil moisture b). Soil type c). Soil texture d). Soil temperature
Last Answer : a). Soil moisture
Description : A dominant weed of puddle paddy soil a). Echinochloa b). Caesulina c). Eclipta sp d). All of these
Last Answer : d). All of these
Description : Large portions of the earth with similar climate, soil, plant and animal life community is known as
Last Answer : Ans. Biosphere
Description : The soil, air and seed borne disease of wheat
Last Answer : Ans. Kernal bunt (Neovossia indica)
Description : The soil borne disease of rice
Last Answer : Ans. Sheath blight of rice (Rhizoctonia oryzae)
Description : Nutrients absorbed by plants from soil solution are carried upward through the
Last Answer : Ans. Xylem
Description : The cause of most of the gaseous interchange in soil
Last Answer : Ans. Diffusion
Description : Which of the plant species can be suggested on saline soil?
Last Answer : Ans. Haloxylon salicornium (II) Biochemistry
Description : The crops prefer acidic soil
Last Answer : Ans. Rice, tea and potato
Description : Method used for the determination of lime requirement of an acid soil is
Last Answer : Ans. Shoemaker’s method
Description : The saline – alkali soil is also known as
Last Answer : Ans. Usar
Description : Alkaline soil is also called as
Last Answer : Ans. Solanetz and Black alkali
Description : Saline soil is also called as
Last Answer : Ans. Solan chalk and White alkali
Description : The soil, which have 8.5 indicates soil is
Last Answer : Ans. Alkaline
Description : Immobile element in soil is
Last Answer : Ans. Phosphorus
Description : In waterlogged rice field, atmospheric nitrogen can be fixed to the soil by
Last Answer : Ans. BGA
Description : Conversion of soil nitrate into gaseous nitrogen is
Last Answer : Ans. Denitrification
Description : Conversion of NH4 to NO2 in soil is brought out by
Last Answer : Ans. Nitrosomonas
Description : Azatobactor can fixes atmospheric nitrogen/ha to the soil.
Last Answer : Ans. 20-30 kg
Description : Rhizobium fixes atmospheric nitrogen/ha to the soil
Last Answer : Ans. 50-100 kg
Description : The method used to determine available phosphorus from soil is
Last Answer : Ans. Olsen’s method
Description : The medium range of available N in soil
Last Answer : Ans. 280-560 kg/ha
Description : The phosphatic fertilizer suitable for acid soil
Last Answer : Ans. Bone meal (23-30%P2O5 )
Description : The fertilizer which destroys soil aggregates
Last Answer : Ans. Sodium nitrate
Description : A practice of turning un-decomposed fresh green plant tissue into the soil to improve fertility status and physical structure of the soil.
Last Answer : Ans. Green Manuring
Description : The capacity of the soil to produce plants under a specified programme of management and it is expressed in terms of yields
Last Answer : Ans. Soil Productivity
Description : The inherent capacity of the soil to supply nutrients to plants in adequate amount and in suitable proportions
Last Answer : Ans. Soil Fertility
Description : The most deficient micronutrient in the Indian soil is
Last Answer : Ans. Zn
Description : Red soil is red coloured due to
Last Answer : Ans. Ferric oxides
Description : Black soil shows black colour due to compound
Last Answer : Ans. Mn
Description : The soil deficient in nitrogen content
Last Answer : Ans. Black soil
Description : Black soil contains the clay mineral
Last Answer : Ans. Montmorillonite clay (2:1)
Description : Newly formed alluvial soil is called
Last Answer : Ans. Khadar
Description : The soil having more than 30% organic matter is placed in
Last Answer : Ans. Histosol
Description : The smell of soil after fresh shower is due to
Last Answer : Ans. Actinomycetes.
Description : The C : N ratio of the soil are fairly constant between
Last Answer : Ans. 10 : 1 to 12 : 1
Description : Mechanical analysis of soil is estimated by
Last Answer : Ans. Stock’s law
Description : The density of soil water is maximum at
Last Answer : Ans. 4°C
Description : The capacity of the soil to change its shape under moist conditions
Last Answer : Ans. Soil Plasticity
Description : Soil colour is determined by
Last Answer : Ans. Munsell Colour chart
Description : Soil structure proving less porosity in soil
Last Answer : Ans. Platy
Description : The best agricultural soil structure is
Last Answer : Ans. Crumby/Spheroidal
Description : The arrangement of primary particles of soil
Last Answer : Ans. Soil structure
Description : The weight of one hectare of surface soil (O-15 cm) in kilograms
Last Answer : Ans. 2.24×10 6 kg/ha
Description : A field soil sample weighing 60 g, lost12 g on over dying. What is the moisture percent on dry weight basis?
Last Answer : Ans. 25%