কৃষিশিক্ষা ১ম পত্র · অধ্যায় ৩ — MCQ ও উত্তর

এইচএসসি প্রস্তুতি · কৃষিশিক্ষা ১ম পত্র। এই অধ্যায়ে মোট 190টি প্রশ্ন আছে। নিচে প্রথম 10টি প্রশ্ন ও সঠিক উত্তর দেওয়া হলো।

এই অধ্যায়ে সব প্রশ্নে অনুশীলন করুন

1. Ribbon retting is practiced in which crop?

   1. Cotton
   2. Jute
   3. Sugarcane
   4. Rice

   সঠিক উত্তর: Jute

   ব্যাখ্যা: Ribbon retting is a water-saving method of extracting fiber from jute.

2. At which stage should rogueing (removing unwanted plants) be done from seed crops? (i) Vegetative growth (ii) Flowering (iii) Maturity

   1. i & ii
   2. i & iii
   3. ii & iii
   4. i, ii & iii

   সঠিক উত্তর: i, ii & iii

   ব্যাখ্যা: Rogueing must be done at all three stages to ensure seed purity.

3. What is the process of pulling up the entire potato plant part above the soil called?

   1. Cutting
   2. Pruning
   3. Curing
   4. Haulm pulling

   সঠিক উত্তর: Haulm pulling

   ব্যাখ্যা: Haulm pulling is done to stop tuber growth and thicken the skin before harvest.

4. Why is the Queen Bee important in a bee colony?

   1. Pollination
   2. Hive making
   3. Reproduction
   4. Honey collection

   সঠিক উত্তর: Reproduction

   ব্যাখ্যা: The Queen bee's only job is to lay eggs and ensure the growth of the colony.

5. Which mushroom is cultivable during the summer season?

   1. Milky
   2. Poplar
   3. Oyster
   4. Button

   সঠিক উত্তর: Milky

   ব্যাখ্যা: Milky mushrooms prefer high temperatures ($30-35^{\circ}C$), making them ideal for summer.

6. Stem: A heifer with 50% Friesian traits (from artificial insemination) is bred again with a 100% Friesian bull. Q: What % of Friesian traits will the second generation have?

   1. 100
   2. 75
   3. 50
   4. 25

   সঠিক উত্তর: 75

   ব্যাখ্যা: Calculation: $(50\% \text{ mother} + 100\% \text{ father}) / 2 = 75\%$.

7. What is it called when the branches and tips of fruit trees gradually dry up and die from the top?

   1. Greening
   2. Dieback
   3. Gummosis
   4. Scab

   সঠিক উত্তর: Dieback

   ব্যাখ্যা: Dieback is a common disease where drying starts from the tips move downwards.

8. Which fertilizer has to be imported from abroad?

   1. Urea
   2. TSP
   3. MOP
   4. Gypsum

   সঠিক উত্তর: MOP

   ব্যাখ্যা: Bangladesh is self-sufficient in Urea but imports most of its MOP (Muriate of Potash).

9. Which of the following is a legume crop?

   1. Rice
   2. Wheat
   3. Sunn Hemp
   4. Sugarcane

   সঠিক উত্তর: Sunn Hemp

   ব্যাখ্যা: Sunn Hemp (Shonpat) is a leguminous plant that fixes nitrogen.

10. Stem: Tarek Miah mixes Azolla (Khudipana) into his rice field soil, increasing yield and lowering costs. Q: Which bio-fertilizer is being added?

    1. Rhizobium
    2. Azolla
    3. Trichoderma
    4. Mycorrhiza

    সঠিক উত্তর: Azolla

    ব্যাখ্যা: Azolla works as a green manure/bio-fertilizer in rice fields.