•  The detrimental effect of one higher plant on other higher plants is known as Allelopathy.
  • The development stage of a plant after which no further increase in dry matter occurs in the economic part is known as Physiological maturity.
  • The die-back disease in citrus is due to the deficiency of Copper.
  • The difference between the highest and lowest value of a series is called Range.
  • The difference between value in use and value in exchange is known as Consumer surplus.
  • The cropping pattern used on a farm and its interactions with farm resources, other farm enterprises, and available technology is called Cropping system.
  • The crops that leave the field exhaustive after growing are called Exhaustive Crops.
  • The crops that prefer acidic soil include Rice, Tea, and Potato.
  • The crops which farmers grow for earning money and trade are called Commercial crops.
  • The cultivated banana is an Autotriploid.
  • The cultivated species of paddy are O. sativa and O. glaberrima.
  • When LER is more than 1, intercropping is Beneficial.
  • The curve with b2 = 3 or Y2 = 0 is called a Mesokurtic curve.
  • The curve with β2 > 3 or Y2 > 0 is called a Leptokurtic curve.
  • The damaging stage of the cutworm is the Caterpillar.
  • The damaging stage of the pink bollworm is the Caterpillar.
  • The deep water rice varieties include Punkaj and Jagannath.
  • The degree of freedom of Normal distribution is infinite.
  • The ecological factors related to soil and substratum are called Edaphic Factors.
  • The economic analysis concerned with individual units, such as a single industry, firm, or consumer, is known as Microeconomics.
  • The economic analysis dealing with the whole economic setup, including total production, total expenditure, and total income, is known as Macroeconomics.
  • The ecosystem component that feeds on producers or consumers is called Heterotrophs.
  • The ecosystem component that breaks down dead organic matter and wastes is known as Decomposers.
  • The effective flow velocity at a unit hydraulic gradient is called Hydraulic conductivity.
  • The electrically charged layer of the atmosphere is known as the Ionosphere.
  • The element that takes part in the growth and development of plants is called Plant nutrients.
  • The eluviation horizon is referred to as the 'E or A2' horizon.
  • The emergence and development of seedlings from the seed-embryo under favorable conditions is called Germination.
  • The diffusion of solvent particles into a living cell is known as Endosmosis.
  • The direction of trade winds in the Northern Hemisphere is North East.
  • The direction of trade winds in the Southern Hemisphere is South East.
  • Coefficient of effectiveness is calculated as C.E. = (Sink / Source) × 100.
  • The distribution in which Mean = Variance is called Poisson distribution.
  • The distribution in which Mean > Variance is called Binomial distribution.
  • The district-level extension programme launched in independent India was in Etawah.
  • The dormancy due to a hard seed coat or impermeable seed coats is called Scarification.
  • The dormancy due to low temperature and moisture conditions is called Stratification.
  • The double helix model of DNA was proposed by Watson and Crick in 1953.
  • The early maturing variety of gram is Chaff chaff, JG-62.
  • The earth contains a thin region known as the biosphere, in which life exists; the three parts of the biosphere are Atmosphere, Hydrosphere, and Lithosphere.
  • The essential component of nucleic acid and protein is Nitrogen (N).
  • The essential element required by the nitrogen-fixing bacterium Rhizobium is Molybdenum (Mo).
  • Examples of 2:1 type silicate clay minerals include Montmorillonite, Vermiculite, and Illite.
  • Goodness of fit test is used for distribution assessment with the Chi-square test.
  • An example of parallel cropping is Urd/Moong + Maize.
  • Examples of POST herbicides include 2, 4-D, Diquat, Paraquat, Isoproturon, Fenoxaprop-ethyl, Sulfosulfuron, and Chlorimuron-ethyl.
  • Examples of PPI (Pre-Plant Incorporated) herbicides include Fluchloralin, Alachlor, and Trifluralin.
  • Examples of PRE (Pre-Emergence) herbicides include Simazine, Atrazine, Alachlor, Butachlor, Nitrofen, and Pendimethalin.
  • The probability of an impossible event is always Zero.
  • The experimental design that provides the maximum degree of freedom for error is Completely Randomized Design (CRD).
  • The Extension Education process is Two-way.
  • The extension work must be based on the needs and interests of the people.
  • The end product of decomposition of organic matter is Humus.
  • The environment that has been modified by human activities is called Anthropogenic environment.
  • The environment that includes producers, consumers, and decomposers is known as Biotic environment.
  • The enzyme contained in pineapple fruit is Bromelain.
  • The enzyme involved in biological nitrogen fixation is Nitrogenase.
  • The error degree of freedom in CRD is formulated as N - t.
  • The error degree of freedom in LSD is formulated as (t - 2)(t - 1).
  • The error degree of freedom in RBD is formulated as (t - 1)(r - 1).
  • The error degree of freedom in SPD is formulated as D(r - 1)(d - 1).
  • The error in which the hypothesis is true but our test rejects it is known as Type I error.
  • The purpose of randomization in field experiments is to control variance.
  • Latin square design is suitable for comparing 5 to 12 treatments.
  • The fertile female in a bee colony is known as The Queen.
  • The fertilizer that destroys soil aggregates is Sodium nitrate.
  • The fertilizer that supplies 3 essential plant nutrients is SSP (Single Super Phosphate).
  • The field rat species living in burrows with a tail longer than its body and a terminal tuft of long hairs is called Antelope rat – Tatera indica.
  • The fine earth covering the land surface that acts as a reservoir of nutrients and water is known as Soil.
  • The first biological process that begins in a seed soon after it imbibes water is Respiration.
  • The first biotech plant is Tobacco.
  • The first governor of RBI was the British banker Osborne Smith, serving from April 1, 1935, to June 30, 1937.