11. Organic manure and bio fertilizers
рдЗрд╕ рдкреЗрдЬ рдкрд░ рдЖрдкрдХреЛ 11. Organic manure and bio fertilizers рдХреЗ рд╕рднреА рдорд╣рддреНрд╡рдкреВрд░реНрдг рдмрд╣реБрд╡рд┐рдХрд▓реНрдкреАрдп рдкреНрд░рд╢реНрди (MCQ), рдкрд░реАрдХреНрд╖рд╛ рдЙрдкрдпреЛрдЧреА рдиреЛрдЯреНрд╕ рдФрд░ рдСрдирд▓рд╛рдЗрди рдХреНрд╡рд┐рдЬрд╝ рдорд┐рд▓реЗрдВрдЧреЗред рдЕрдкрдиреЗ рдЬреНрдЮрд╛рди рдХрд╛ рдкрд░реАрдХреНрд╖рдг рдХрд░рдиреЗ рдФрд░ рдмреЛрд░реНрдб/рдкреНрд░рддрд┐рдпреЛрдЧреА рдкрд░реАрдХреНрд╖рд╛ рдореЗрдВ рд╢рдд-рдкреНрд░рддрд┐рд╢рдд рдЕрдВрдХ рдкреНрд░рд╛рдкреНрдд рдХрд░рдиреЗ рдХреЗ рд▓рд┐рдП рдиреАрдЪреЗ рджрд┐рдП рдЧрдП рдореЙрдХ рдЯреЗрд╕реНрдЯ рдореЗрдВ рдЕрд╡рд╢реНрдп рднрд╛рдЧ рд▓реЗрдВред
ЁЯСЙ рдЕрдзреНрдпрд╛рдп рдХрд╛ рд╕рд╛рд░рд╛рдВрд╢ (Summary)
Dear students, a very warm, highly practical, profoundly eco-friendly, and immensely welcoming greeting to this incredibly crucial chapter of Agriculture Chemistry titled 'Organic manure and bio fertilizers', a chapter that continuously proves to be nothing short of a massive, life-saving blessing for our hardworking farmers. In today's highly commercialized and ruthlessly modern agricultural era, driven purely by the immense greed to obtain the absolute maximum crop yield in the shortest possible time, farmers are blindly, excessively, and carelessly applying highly dangerous, concentrated synthetic chemical fertilizers (such as Urea and DAP) into their vast agricultural fields. Directly due to this rampant, unchecked, and highly inappropriate usage, the naturally fertile, soft, and life-giving soil of our agricultural lands is slowly but surely turning into a highly toxic poison and is degrading into completely barren, rock-hard wasteland at a truly terrifyingly rapid pace. The only absolute, most highly sustainable, totally safe, and permanent ultimate solution to this incredibly severe and massive global environmental crisis is to completely embrace and adopt 100% pure Organic Farming.
Let us try to understand this incredibly vital concept very deeply by using a very direct, straightforward, and common everyday example from our beautiful rural village life. You must have very frequently observed in your local village that highly aware, traditional, and progressive farmers continuously gather the daily fresh dung of their domestic pet animals (like cows and buffaloes), leftover useless dry fodder, wet kitchen waste, and burnt ash, systematically dumping them all into a massive, deep pit specifically dug at the very edge of their agricultural field. After a prolonged period of a few long months, all that accumulated, seemingly useless waste is magically rotted, heavily decayed, and completely transformed by billions of microscopic organisms into a incredibly rich, dark black and deep brown, highly porous, premium-quality natural fertilizer. In the strict, precise language of advanced agricultural science, we respectfully call this miraculous substance 'Farm Yard Manure' (FYM) or simply cow dung manure. When this fantastic, 100% natural organic manure is heavily applied to the agricultural field, not only does the resulting crop become incredibly healthy, lush, and highly nutritious, but the vital water-holding capacity of the soil is astonishingly increased and maintained for an extremely long duration. Furthermore, the soil's absolute best biological friends, such as the hardworking earthworms, flourish and multiply rapidly, working tirelessly to make the soil internally soft, highly porous, and well-aerated. In sharp, terrifying contrast to this, simply dumping bags of synthetic Urea definitely causes the crop to suddenly shoot up unnaturally fast, but it simultaneously brutally murders the soil microbes, eventually turning the soft soil completely hard, compacted, and totally barren. In this extensively detailed, highly practical chapter, we will conduct a very deep scientific study regarding the exact, precise scientific methods of properly preparing this highly valuable Farm Yard Manure, the famous NADEP method of creating rich compost, and the truly miraculous, highly potent 'Vermicompost', which is specially and meticulously prepared with the dedicated help of specific earthworm species.
In addition to this, we will also thoroughly comprehend the truly astonishing, almost magical biological miracles performed by 'Biofertilizers'. Do you actually know that our vast Earth's atmosphere naturally contains an incredibly abundant, completely free supply of approximately 78% Nitrogen gas, which certain highly specific, incredibly wonderful natural bacteria can directly pull straight out of the thin air and effortlessly deliver directly to the growing roots of the plants? Inside the unique, specialized pink-colored root nodules predominantly found in leguminous pulse crops (such as chickpeas, moong, and urad beans), a tremendously highly beneficial, microscopic bacterium named Rhizobium safely resides. This is a 100% natural, incredibly powerful biofertilizer that effectively provides an abundant, continuous supply of essential nitrogen to the farmer's standing crop without forcing him to spend even a single penny on expensive synthetic fertilizers. Similarly, other remarkable microorganisms like Azotobacter, Azospirillum, and Blue Green Algae (BGA) genuinely act as nothing less than magical life-saving herbs for vast wheat and flooded rice fields. Furthermore, the highly traditional and deeply scientific technique of utilizing 'Green Manure'тАФwhich simply involves rapidly growing a specific lush, leafy leguminous crop like Sunhemp or Dhaincha and then heavily plowing it directly back into the wet soil with a heavy tractor right before it begins to flowerтАФis an absolutely fantastic, incredibly cheap, and highly natural method to massively boost the soil's biological fertility.
From the strict and highly analytical viewpoint of the upcoming NCERT and RBSE board exams in 2027, this entire comprehensive chapter is the absolute beating heart and soul of your agriculture chemistry syllabus. Every single year in the main final board examinations, a massive plethora of highly important objective questions are compulsorily asked regarding the various scientific methods of compost preparation, the exact biological formation and massive agricultural importance of Vermicompost, and the highly specific, intricate physiological functions of the Rhizobium bacteria. Along with this, if you are passionately preparing for top-tier prestigious national entrance exams like the JET exam and ICAR, you must study this chapter with intense focus. In these highly competitive exams, direct VVI questions appear consistently regarding the precise chemical composition (exact percentage of N, P, K) of various organic manures and the detailed scientific classification of biofertilizers. To flawlessly fulfill this exact academic requirement of yours and to make your preparation 100% robust, we have meticulously prepared a truly magnificent online test right here on our 'HR CHEM STUDY' portal. Regularly practicing these carefully selected multiple-choice questions (MCQs) will make all your core concepts absolutely crystal clear.
Feature: This is a unique 3-Level based quiz. To unlock the next levels (Level 2 and 3), students must score at least 70% marks in the current level, which makes their board exam preparation 100% stronger.
рдорд╣рддреНрд╡рдкреВрд░реНрдг рдкреНрд░рд╢реНрди (Important Questions)
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Organic Manure is primarily composed of:
A) Chemicals | B) Animal/Plant residues | C) Stones | D) Plastic -
Best method to prepare Farm Yard Manure (FYM) is:
A) Heap method | B) Trench method | C) Open method | D) Surface method -
Best species of earthworm for preparing Vermicompost is:
A) Pheretima posthuma | B) Eisenia foetida | C) Lumbricus | D) None -
Bio-fertilizer used to treat Gram (Chickpea) seeds is:
A) Azotobacter | B) Rhizobium | C) Azolla | D) Blue green algae -
Best bio-fertilizer for nitrogen fixation in Rice crop:
A) Rhizobium | B) Azolla | C) Azospirillum | D) Phosphobacteria -
Most suitable crop for Green Manure is:
A) Wheat | B) Dhaincha or Sunnhemp | C) Maize | D) Barley -
Which of the following is a Phosphate Solubilizing Bacteria (PSB)?
A) Rhizobium | B) Pseudomonas | C) Azotobacter | D) Azolla -
Organic manure positively impacts which soil condition?
A) Physical | B) Chemical | C) Biological | D) All of the above -
Size of tank (LxWxH) for NADEP compost method is:
A) 5x5x5 ft | B) 10x6x3 ft | C) 20x10x5 ft | D) 1x1x1 ft -
Microbes that make atmospheric nitrogen accessible to plants are:
A) Fertilizer | B) Bio-fertilizers | C) Pesticide | D) Herbicide -
Average nitrogen content in well-rotted FYM is:
A) 0.1% | B) 0.5% | C) 2.0% | D) 5.0% -
Nutrient content in Vermicompost compared to FYM is:
A) Less | B) More (2-3 times) | C) Equal | D) Zero -
Suitable bio-fertilizer for non-leguminous crops like Maize and Bajra:
A) Rhizobium | B) Azotobacter | C) Blue green algae | D) None -
Who were the pioneers of the 'Indore method' of composting?
A) Albert Howard and Wad | B) C.N. Acharya | C) Dr. Swaminathan | D) Liebig -
What do bio-fertilizers primarily provide?
A) Soil color | B) Enrichment of beneficial microbes | C) Toxic chemicals | D) Only water -
Chemical fertilizer reduction via bio-fertilizer use is approx:
A) 0% | B) 5% | C) 20 to 25 percent | D) 100% -
Ideal moisture level (%) while making Vermicompost:
A) 10% | B) 30-40% | C) 90% | D) Zero -
N-fixing bacteria convert atmospheric 'N2' into:
A) Nitrate/Ammonium | B) Sugar | C) Protein | D) Vitamin -
Average time for FYM to get ready:
A) 15 days | B) 3-4 months | C) 1 year | D) 2 years -
Advantage of burying green manure crop in soil at the flowering stage:
A) Max Nitrogen and Organic matter gain | B) Fewer seeds used | C) Soil hardens | D) No benefit -
Who developed the 'Bangalore method' of composting?
A) Albert Howard | B) Dr. C.N. Acharya | C) Jenny | D) Joffe -
Main function of Blue Green Algae (BGA) in rice fields is:
A) Irrigation | B) Nitrogen fixation | C) Killing insects | D) Growing weeds -
Why is 'Epigeic' earthworm species best for vermicompost?
A) Lives deep in soil | B) Feeds on organic waste only on top surface | C) Is very large | D) Floats in water -
Main function of Mycorrhiza in soil is to increase availability of:
A) Nitrogen | B) Phosphorus (P) | C) Potassium | D) Magnesium -
Effect of organic manures on soil Water Holding Capacity:
A) Decreases | B) Increases | C) Remains unchanged | D) Zeroes out -
What is Azolla actually, which forms symbiosis with BGA?
A) Bacteria | B) Aquatic fern | C) Fungi | D) Shrub -
Main purpose of keeping FYM covered in pits:
A) Prevent theft | B) Prevent nutrient loss (especially Nitrogen) | C) Increase temp | D) None -
Why use jaggery solution while treating seeds with Rhizobium?
A) Improve taste | B) Stick bacteria to seed and provide nutrition | C) Dry the seed | D) None -
Benefit of heat generated during composting:
A) Soil burning | B) Destruction of pathogens and weed seeds | C) Red compost color | D) None -
Approx nitrogen fixed per hectare by 'Sunnhemp' green manure:
A) 20-30 kg | B) 75-80 kg | C) 200 kg | D) 5 kg -
VAM (Vesicular Arbuscular Mycorrhiza) is an example of:
A) Endo-mycorrhiza | B) Ecto-mycorrhiza | C) Bacteria | D) Algae -
Why is there an Expiry date on bio-fertilizer packets?
A) Plastic degrades | B) Viable microbial count drops over time | C) For show | D) None -
Recommended quantity of Azolla per hectare in rice fields:
A) 100 kg | B) 10 tons (or 10 quintals) | C) 50 tons | D) 1 kg -
Composting process is primarily executed by:
A) Physical force | B) Temperature | C) Biochemical action of microbes | D) Irrigation -
How much waste can 'Eisenia foetida' eat in a day compared to its weight?
A) 10 times | B) Equal (almost its own weight) | C) Half | D) None at all -
Effect of organic manures on soil Bulk Density:
A) Increases | B) Decreases (improving aeration) | C) Remains stable | D) Zeroes out -
Specific species 'Rhizobium leguminosarum' is for which crop?
A) Pea | B) Soybean | C) Groundnut | D) Berseem -
Why protect bio-fertilizers from direct sunlight?
A) Color fades | B) High temp kills beneficial bacteria | C) Packet bursts | D) None -
Effect of high C:N ratio on composting speed:
A) Fast | B) Slow | C) Stops | D) Zero -
Importance of 'Vermiwash' present in vermicompost:
A) Just water | B) Rich in plant growth hormones and nutrients | C) Harmful | D) None -
What type of N-fixation does Azospirillum perform?
A) Symbiotic | B) Associative (semi-symbiotic) | C) Parasitic | D) None -
Main function of PSB in soil is converting insoluble phosphorus into:
A) Gas | B) Soluble form | C) Stone | D) Soil -
Average Potash (K2O) content in FYM:
A) 0.2% | B) 0.5% | C) 1.0% | D) 5.0% -
Why are ventilation holes provided in NADEP tank walls?
A) Drain water | B) Aeration (air circulation) | C) Viewing | D) None -
Effect of using organic manure on soil Buffering Capacity:
A) Decreases | B) Increases | C) Zeroes out | D) No effect
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