ক) Deficiency symptoms are seen when the nutrient is deficient
খ) Severe yield reduction may occur without appearance of deficiency symptoms
গ) The nutrient is not deficient but apparently seems to be deficient
ঘ) Visual deficiency symptoms are suppressed by other elements
০১। 0.03 N, NH4 F + 0.025 N, NCl, is called:
ক) Bray No. 1 extractant
খ) Olsen extractant
গ) Bray No. 2 extractant
ঘ) None of these
০২। 0.5 N, NaH CO3 (pH 8.5) is:
ক) Bray No. 1 extractant
খ) Bray No.2 extractant
গ) Olsen extractant
ঘ) None of these
০৩। 1.6 to 2.3 value of nutrient index indicates:
ক) Average fertility of soil
খ) Adequate fertility of soil
গ) Both of the above
ঘ) None of the above
০৪। 95 to 99.5% portion of plant tissues are made up of:
ক) N, P and K
খ) C, Hand O
গ) Ca, Mg and C
ঘ) None of these
০৫। A = B (1-y) denotes A-value in which A is equal to:
ক) Amount of available nutrients in soil
খ) Amount of total nutrients in soil
গ) Amount of unavailable nutrients in soil
ঘ) None of these
০৬। A = RKLSCP denote universal soil loss equation in which K is equal to:
ক) Soil credibility factor
খ) Soil productivity factor
গ) Soil leaching factor
ঘ) Crop management factor
০৭। A combination of many taxonomic units like soil series, phase or types is called:
ক) Soil variant
খ) Soil series
গ) Soil complex
ঘ) Soil association
০৮। A complex mixture of brown amorphous and colloidal substances synthesized by various soil organisms is referred to as:
ক) Compost
খ) Humus
গ) FYM
ঘ) Peat super compost
০৯। A man made epipedon in many characters except P2O5 content (more than 250 ppm) is:
ক) Hisitic epipedon
খ) Ochric epipedon
গ) Anthropic epipedon
ঘ) Umbric epipedon
১০। A pH value of 6.0 indicates that the soil reaction is:
ক) Acidic
খ) Alkaline
গ) Neutral
ঘ) Highly alkaline
১১। A property of fluids by virtue of which it reduces the relative motion among different layers of fluid, is termed as:
ক) Soil consistency
খ) Soil specificity
গ) Soil viscosity
ঘ) None of these
১২। A sequence of soil of about same age, derived from same parent material and occurring under similar climatic conditions but has different characteristics due to variation in relief and drainage is termed as:
ক) Soil series
খ) Catina
গ) Soil phase
ঘ) None of the above
১৩। A soil absorbs about _____ of incoming solar radiation:
ক) 5%
খ) 10%
গ) 15%
ঘ) 20%
১৪। A soil which has pH less than 8.5, ESP less than 15 and EC more than 4 mmhos/cm at 25 ?C is called:
ক) Saline soil
খ) Alkaline soil
গ) Saline-alkali soil
ঘ) None of these
১৫। A soil with 20 me ______ 100 g ECE and me/100 gm exchangeable H will have a base saturation of:
ক) 25%
খ) 75%
গ) 80%
ঘ) 133.30%
১৬। A soil, which has pH more than 8.5, ESP more than 15 and EC less than 4 mmhos/cm at 25?C, is called:
ক) Saline soil
খ) Alkaline soil
গ) Saline alkaline soil
ঘ) All of the above
১৭। A sub-surface horizon in which the accumulation of organic matter and clay occurs just below the plough:
ক) A horizon
খ) B horizon
গ) C horizon
ঘ) None of these
১৮। A sub-surface horizon with highly oxidized material and 1:1 type clay minerals is known as:
ক) Cambic horizon
খ) Sodic horizon
গ) Oxic horizon
ঘ) Agric horizon
১৯। A surface horizon, which has very high organic matter, is: