সকল সরকারী/বেসরকারী পরীক্ষার প্রশ্ন পেতে ক্লিক করুন গণিতের আইকিউ টেস্ট করতে ক্লিক করুন 
Farmers can keep their soil fertile by--
Farmers can keep their soil fertile by--
- ক. Crop rotation
- খ. Regular tilling
- গ. Repeatedly growing the same crop
- ঘ. Irrigation
সঠিক উত্তরঃ Crop rotation
এ সম্পর্কিত আরো প্রশ্ন দেখুন
- Which of the following helps keep body cool?
- Mark the wrong combination--
- Which of the following compounds are responsible for acid rain?
- What is the scientific name of Vitamin C?
- Which one of the following serves as host tree for silkworm to produce good silk?
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Basic Information of Daily Science, Inventions and...