Description : Which bacterium is used for nitrogen fixation in sugarcane field?
Last Answer : Ans.Acetobactor diazotrophicus
Description : A non-photosynthetic aerobic nitrogen fixing soil bacterium is (a) Rhizobium (b) Clostridium (c) Azotobacter (d) Klebsiella.
Last Answer : (c) Azotobacter
Description : Which of the following is free-living aerobic non- photosynthetic nitrogen-fixing bacterium? (a) Nostoc (b) Azospirillum (c) Rhizobium (d) Azotobacter
Last Answer : (d) Azotobacter
Description : 19.Which of the following is a free living nitrogen fixing bacterium present in the soil (a)Nitrosomonas (b)Rhizobium (c)Azotobacter (d)Pseudomonas
Last Answer : ANS.(C) Azotobacter
Description : Anaerobic environment in rice soil is responsible for gaseous loss of fertilizer nitrogen by
Last Answer : Ans.Denitrification
Description : Nitrogen use efficiency in rice is around
Last Answer : Ans.30-40%
Description : Rice prefer nitrogen uptake in
Last Answer : Ans.Ammonical form (NH4 ).
Description : Nitrogen fixing bacteria found in the root nodules of leguminous plant is:- (1) Saprophytic (2) Parasitic (3) Symbiotic (4) Autotrophic
Last Answer : (3) Symbiotic Explanation: Many legumes have root nodules that provide a home for symbiotic nitrogenfixing bacteria called rhizobia. This relationship is particularly common in nitrogen-limited conditions. .
Description : A nitrogen-fixing microbe associated with Azolla in rice fields is (a) Spirulina (b) Anabaena (c) Frankia (d) Tolypothrix.
Last Answer : (b) Anabaena
Description : Nitrogen fixing bacteria make combination with cells of the roots of - a) Pulses b) Rice c) Wheat d) Sugarcane
Last Answer : a) Pulses
Description : A nitrogen-fixing microbe associated with Azolla in rice fields is (1) Tolypothrix (2) Spirulina (3) Anabaena (4) Frankia
Last Answer : (3) Anabaena
Description : The essential element required by the N fixing bacterium Rhizobium
Last Answer : Ans. Mo
Description : All of the following statements concerning the actinomycetous filamentous soil bacterium Frankia are correct except that Frankia (a) can induce root nodules on many plant species (b) can fix ... its host plant through root hair deformation and stimulates cell proliferation in the host's cortex
Last Answer : (b) can fix nitrogen in the free-living state
Description : Select the correct statement: (a) Legumes are incapable of fixing nitrogen (b) Legumes fix nitrogen through bacteria living in fruits root (c) Legumes fix nitrogen only by bacteria present in nodules (d) None of the above
Last Answer : Ans. (c)
Description : Which root contain nitrogen fixing bacteria?
Last Answer : Nodulated root
Description : 83. Which one of the following is wrong statement ? (1) Nitrosomonas and Nitrobacter are chemoautotrophs (2) Anabaena and Nostoc are capable of fixing nitrogen in free-living state also (3 ... living conditions (4) Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins
Last Answer : Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins
Description : What is the Critical Period of Crop-Weed Competition for Upland rice condition?
Last Answer : Ans.Entire period of crop growth
Description : What is the Critical Period of Crop-Weed Competition for transplanted rice?
Last Answer : Ans.30-45 DAS
Description : Mimicry weeds of rice and wheat is
Last Answer : Ans.Phalaris and wild rice
Description : Water requirement of rice is
Last Answer : Ans.90-250 cm
Description : Irrigation method suitable for lowland rice and jute
Last Answer : Ans.Flooding
Description : Hydrothermal process of rice which saves vitamin B12?
Last Answer : Ans.Parboiling 2. Wheat
Description : Killer disease of rice are
Last Answer : Ans.Bacterial Leaf Blight (BLB) and Tungro virus
Description : Dead heart and white ear of rice is caused by
Last Answer : Ans.Yellow stem borer
Description : White eye of rice is caused by
Last Answer : Ans.Fe deficiency.
Description : Polish percentage of rice is
Last Answer : Ans.2%
Description : Common herbicide used in rice crop field?
Last Answer : Ans.Anilophos and Butachlor.
Description : Most dominated weed species in rice field is
Last Answer : Ans.Echinochloa spp.
Description : Weed caused relatively more loss in rice productivity, when it is
Last Answer : Ans.Direct seeded
Description : Gas emitted from rice field is
Last Answer : Ans.CH4 (Methan).
Description : Super rice variety is
Last Answer : Ans.Lunishree
Description : Rice varieties suitable for Saline-alkaline soil are
Last Answer : Ans.CSR-10, CSR-13, CSR-27
Description : The deep water rice are
Last Answer : Ans.Punkaj, Jagannath
Description : The Blast resistance varieties of rice is
Last Answer : Ans.Tulsi, IR64
Description : The Gall midge resistance varieties of rice is
Last Answer : Ans.Phalguna, Surekha, Suraksha
Description : Aroma in rice is due to presence of
Last Answer : Ans.“Di-acetyl 1 propaline” chemical
Description : In low land rice, fertilizer is applied in
Last Answer : Ans.Reduced zone only
Description : The most important critical stage of rice for irrigation
Last Answer : Ans.Tillering to flowering stage
Description : For correction of iron chlorosis in rice, following spray is recommended
Last Answer : Ans.1%solution of ferrous sulphate
Description : The recommended dose of N, P and K for rice crop
Last Answer : Ans.100:60:40 kg ha–1
Description : The best fertilizer for top dressing in rice?
Last Answer : Ans.Ammonium sulphate
Description : Most prominent cropping pattern of rice in India?
Last Answer : Ans.Rice-Wheat
Description : The nursery area required for providing seedlings for transplanting 1 ha rice field
Last Answer : Ans.1000 m2 (1/10 ha)
Description : In rice ‘Dapog seedlings’ are ready for transplanting
Last Answer : Ans.11-14 DAS
Description : Under SRI method, rice plant is transplanted at
Last Answer : Ans.10-12 DAS (Days After Sowing)
Description : Normally rice plant is transplanted at
Last Answer : Ans.21-25 days after sowing (3-4 leaf stage)
Description : The rice variety called ‘miracle rice’ is
Last Answer : Ans.IR-8
Description : First intervarietal cross variety of rice?
Last Answer : Ans.Jaya (TN1 = T141)
Description : The gene responsible for dwarfness in rice is
Last Answer : Ans.Dee-gee-woo-gene
Description : Hulling percentage of rice is
Last Answer : Ans.70-75%