select all the correct answers.\nthe adoption of which two practices helped to increase the amount of food…

select all the correct answers.\nthe adoption of which two practices helped to increase the amount of food produced per unit area of farmland?\n□ four - field crop rotation\n□ the application of chemical pesticides\n□ the use of steam - powered tractors\n□ land irrigation using steam - powered pumps\n□ selective livestock breeding

select all the correct answers.\nthe adoption of which two practices helped to increase the amount of food produced per unit area of farmland?\n□ four - field crop rotation\n□ the application of chemical pesticides\n□ the use of steam - powered tractors\n□ land irrigation using steam - powered pumps\n□ selective livestock breeding

Answer

Answer:

  • A. four - field crop rotation
  • B. the application of chemical pesticides

Brief Explanations:

Four - field crop rotation helps maintain soil fertility and reduces pests and diseases, increasing yields. Chemical pesticides control pests that damage crops, thus increasing the amount of food produced per unit area. Steam - powered tractors and pumps mainly improve efficiency in large - scale farming rather than directly increasing per - unit - area production. Selective livestock breeding is for improving livestock quality, not directly related to crop production per unit area of farmland.