PHYSIOLOGICAL density#what is physiological density#how we calculate physiological density#meaning of physiological density#term physiological density#meaning of the term physiological density#class 12syllabus#agriculture#density#cultivable land#population#dependent on agriculture#ratio##ratio between cultivable land and number of people #per hectare cultivable land
फीज़िओलौजीकल दैन्सिटी#क्या है फीज़िओलौजीकल दैन्सिटी
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