उत्तर प्रदेश में कुल कितने जैव उर्वरक उत्पादन केन्द्र हैं ? - How many bio fertilizer production centers are there in Uttar Pradesh? - Uttar Pradesh Me Kul Kitne Jaiv Urvarak Utpadan Kendra Hain ? UP GK in hindi, मिट्टी कृषि एवं पशुपालन 15 question answers in hindi pdf 17 questions in hindi, Know About 10 UP GK online test UP GK notes in hindi quiz book 22