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ILEIA Newsletter - LEISA Magazine - Farming Matters FM 1987 ILEIA Newsletter Vol 3 #1

已出版: 1987-05-19

  • Integrated nutrient supply
  • Improved fallow
  • Nitrogen transfer from legumes
  • Cover crops on acid soils
  • Sunnhemp
  • Rock phosphate
  • Micro-nutrient drain
  • Soil conservation and shifting cultivators
  • Cycles of poverty