Description : Black soil contains the clay mineral
Last Answer : Ans. Montmorillonite clay (2:1)
Description : The mineral weathering and clay formation are rapid where the climate is- (a) Warm and moist (b) Warm and dry (c) Cold and moist (d) Cold and dry
Last Answer : (c) Cold and moist
Description : Which of the following mineral is least resistant to weathering ? a. Quartz b. Olivine c. Goethite d. Anorthite
Last Answer : c. Goethite
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 : Soil structure proving less porosity in soil
Last Answer : Ans. Platy
Description : The best agricultural soil structure is
Last Answer : Ans. Crumby/Spheroidal
Description : Which mineral is a source of phosphorus and boron in soils?
Last Answer : Ans. Apetite
Description : The most dominant mineral on earth crust
Last Answer : Ans. Feldspar (48%)
Description : The soil having more than 30% organic matter is placed in
Last Answer : Ans. Histosol
Description : The soil having PD 2.50 g/cc and BD 1.25 g/cc will have _____ % porosity.
Last Answer : Ans. 50
Description : The Indian peninusula as compared to the north Indian plains is (a) Rich in mineral (b) More stable (c) At a higher level (d) All the above
Last Answer : Ans: (d)
Description : 1. Name the Indian soil which is formed due to the weathering of basic igneous rocks. 2. Name two states of India where this type of soil is found. -Geography
Last Answer : 1. Black soil 2. Maharashtra and Gujarat
Description : The formation of laterite soil is mainly due to: (a) weathering (b) erosion (c) leaching (d) deposition
Last Answer : Ans: (c)
Description : Which one of the following statements is NOT correct? [IAS 2003] (a) Black cotton soil of north-west India was formed by the weathering of basaltic lava rocks (b) Sedimentary rocks are distinguished ... feldspar and mica in it (d) A metamorphic rock is softer and less compact than its original type
Description : Which one of the following does not cause soil erosion? (1) Deflation (2) Deforestation (3) Weathering (4) Overcropping
Last Answer : (1) Deflation Explanation: Deflation is a decline in general price-levels, often caused by a reduction in the supply of money or credit. Deflation can also be brought about by direct contractions in ... in an economy, since the process often leads to a lower level of demand in the economy.
Description : Generally, the soil of the northern plains of India has been formed by – (1) degradation (2) aggradation (3) weathering in situ (4) erosion
Last Answer : (2) aggradation Explanation: The Northern Fertile Plain lies to the south of Himalayan Region, It is also called the Gangetic Plain. It is a vast plain and level land between the Himalayas in the North ... and is very fertile. This plain is one of the largest and most fertile plains of the World.
Description : Chemical weathering of soil is caused due to (A) Oxidation (B) Carbonation (C) Hydration (D) All the above
Last Answer : Answer: Option D
Description : Minerals in soil body come from a. Weathering of rocks b. Wind and water c. Rains d. Dead organic remains
Last Answer : a. Weathering of rocks
Description : Which one of the following does not cause soil erosion ? (1) Deflation (2) Deforestation (3) Weathering (4) Overcropping
Last Answer : Deflation
Description : A single DNA molecule condensed into a compact structure in vivo by complexing with accessory histones or histone-like proteins.
Last Answer : Ans. Chromosome
Description : Whip like structure appeared in terminal bud
Last Answer : Ans. B deficiency
Description : The structure of atmosphere is divided on the basis of
Last Answer : Ans. Vertical temperature difference
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 : 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