섬유

energetics of cotton agronomy

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 282
agronomic data from a sample hectare of cotton-growing area of our farm were examined for energy inputs, outputs and balance for comparison with monetary values. mechanized farming consumed about 45 of the energy inputs and accounted for about 20 of the expenses the major cost (53) was for manpower, which accounted for about 5 of the energy inputs. irrigation consumed about 30 of the energy inputs but cost only 1. fertilizers cost about 6 and accounted for about 12 of energy inputs. insecticide use consumed under 6 of the energy used but cost about 16. the total energy inputs were 10,475 mcal and resulted in an output of 30,107 mcal, a gain of a factor of 2.87. cotton sticks provided about double the entire needed energy inputs. (author abstract) 11 refs
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