Tiêu đề SSAC-353 objective (LBV).pdf ✅

SSAC – 353 Objective 1. Who give the law of minimum- Justus Von Leibig 2. Who is the father of Agriculture Chemistry- Justus Von Leibig 3. Definition of soil fertility & productivity. Ans. Soil fertility: Soil fertility is defined as the quality that enables the soil to provide proper nutrient compounds in proper amounts and in proper balance for the growth of specified plants 4. All the productivity soils are fertile but not all fertile soils are (state True or False)- True. 5. Beneficial elements for tobacco- sodium, cobalt & Rice- silicon 6. Recently added nutrient is Nickel (Ni) in 1987. 7. Which is nutrient elements is moderately mobile to plants. - Zn, Mg 8. Which nutrient elements having functions energy stores - C,N,P & S. 9. What is % of concentration of Nitrogen plants- 1-5%. 10. Blossom end rot in tomatoes & bitter pits in apples are deficiency symptoms of Ca. 11. Which nutrients elements exist in two important essential amino acid like Methionine & cystenine – S (sulphur) 12. Pungent order of onion & garlic is due to – presence of S comp. 13. Which is important nutrients for oilseeds, sugars & pulses crop- 5. OR Which is master of nutrients for oil seed production – 5. 14. Chlorosis on older leaves is deficiency of Nitrogen. 15. What is C:N ratio of soil, saw dust, straw residues & microorgranism.
Ans. C/N ratio: The ratio of the weight of organic carbon to the weight of total nitrogen in soil or organic material. C/N ratio in plants & Microbes and soil :  Legumes and farms manures - 20:1 to 30:1  Straw residues - About 100 :1  Saw dust - 400 : 1  Microorganisms - 4:1 to 9 : 1  Soil - 10:1 to 12:1. 16. Who defined the criteria of essentiality for plant growth – Arnon & Stout in 1939. 17. Carbohydrates present in undercomposed organic matter is 60%. 18. Which is rapidly decomposed material or product – sugar, starch, proteins. 19. Manure word derived from – French word “Manoeuvrer”. 20. FYM contains – 0.5% N, 0.2% P & 0.5% K. 21. Who is recommended the Trench method of FYM preparation – Dr. C. N. Acharya. 22. Suitable size of trenches is 6-7.5m × 1.5-1.6m × 0.91-1m 23. The commonly used chemical presentation for FYM are – Gypsum & super phosphate. 24. Who developed Indore method in India – Howard & Ward. 25. Which is method of composting is anaerobic decomposition – Banglore method. 26. Banglore method of composting also called as – pit method & hot fermentation method. 27. Chemical composition of NADEP method of composting – 0.5- 1.5% N, 0.5-0.9% P2O5 & 1.2-1.4% K2O 28. Vermiculture means scientific method of breeding & rising earthworm is controlled condition.
29. Use of Calcium Phosphate is recommended to avoid the loss of ammonia into the atmosphere. 30. Types of earthworm – Red worm (Lumbricus rubellus) Branding worm (Eisenia foetida) Field worm (Allobophora caliginosa) 31. Size of pit for vermicomposting – 2m × 1m × 1m. 32. Recommended dose of vermicompost for field crop – 5 t/ha. 33. Example of green manuring in situ – Sun hemp (Crotalaria juncea), Dhaincha (Sesbania aculeata), Guar (Cyamopsis tetragonoloba), Phillipesara (Phaseolus trilobus). 34. Sludge contain – 1.5-3.5% N, 0.78-4.0% P2O5 & 0.3-0.6% K2O. 35. K2O content in biogas plant slurry – 0.8 to 1.2% K2O. 36. Bone meal is suitable for acid soil. 37. Oil cakes nitrogen becomes slowly available to crop from Mahua cake & is suitable for orchard & long duration crop. 38. Fish meal contain Nitrogen & phosphoric acird. 39. In blood meal manure, the blood clot is first treated with copper sulphate at 125g/100kg or clot. 40. Example of straight fertilizer – Urea (46% N). 41. Which nitrogenous fertilizer contains more % of nitrogen – Anhydrous ammonia (82% N).Give examples of amide ferlitizer – Urea Co(NH2)2= 46% N Calcium cynamide (CaNCN)= 21% N 42. Nitrate ferilizers is basic residual effect on soil. 43. In manufacturing process of urea, when it undergoes hydrolysis in presence of enzyme ureases & is converted to ammonium carbonate & then by microbial oxidation into Ammonia & nitrate.
44. Urea us manufactured by reacting anhydrous ammonia & carbon dioxide gas under very high pressure in presence of suitable catalyst. 45. Which fertilizer is used for both acidic & basic residual effect – calcium ammonium nitrate (CAN). 46. Calcium ammonium nitrate (CAN) is a mixture of calcium chloride & ammonium nitrate. 47. When phosphorous element is burn then it converted into - phosphorus pentaoxide (P2O5). 48. Which phosphotic fertilizers is suitable for acidic soils – citrate soluble or dicalcium phosphate Ca2H2(PO4)2. 49. Which is phosphotic fertilizers well suitable for acidic soils & for long duration crop – Bone meal. 50. Chemical formula of citrate soluble phosphate is - Ca2H2(PO4)2 or CaHPO4. 51. Which is two important ingredients of super phosphate – Monocalcium phosphate & gypsum.