นี้ Book ไม่ได้อยู่ในภาษาของคุณ, ดูใน: English (en),
หรือใช้ Google Translate:  

Through sustained agricultural food production using ducks, fish, and crops this experiment sets out to be a means to love the poor.  A system was built where ducks, fish, and crops could feed off each other's wastes. The plants and ducks grew well but there was not enough oxygen for the fish.

รายละเอียดสิ่งพิมพ์

  • ผู้ตีพิมพ์: California Polytechnic State University
  • Dewey Decimal: 636.5
  • ห้องสมุด ECHO: 636.5 HEW