To Research the Development of the Tang Dynasty HeLong Agricultural Economy from the Population Area Change

Agriculture in the national economy at the foundation of the economy,both the national economy and people’s livelihood have played a special and important role.The HeLong region of the Tang Dynasty economic development of the agricultural research,not only enable us to better understand what was the HeLong region’s the economic development of agriculture,and further deepen our understanding of the Tang Dynasty agricultural economy,but also for today's Western Development to provide historical reference.