TABLE OF CONTENTS 



Page 



Preface 5 



Introductory 7 



What is a Weed ? 8 



Losses due to Weeds 8 



How Weeds Spread 10 



Classification of W' eeds 10 



Weed Seeds in the Soil 12 



Control and Extermination of Weeds 13 



General Principles 15 



Summer Fallowing 15 



Short Rotation of Crops 17 



Sheep Destroy W^eeds 18 



Seeding to Grass 18 



Farm Implements to Destroy Weeds 19 



Weed Seeds in Commercial Seeds and Feeding Stuffs 21 



Grass Family 22 



Sedge Family 39 



Rush Family 40 



Buckwheat Family 40 



Spinach or Goosefoot Family 50 



Pigweed Family 56 



Pink Family 59 



Purslane Family 73 



Buttercup Family 75 



Fumitory Family 77 



Mustard Family 77 



Caper Family 102 



Orpine Family 103 



Rose Family 103 



Pea Family 107 



Spurge Family 110 



Mallow Family Ill 



St. John's-wort Family 112 



Evening Primrose Family 113 



Parsley Family 115 



Milkweed Family 119 



Morning Glory or Convolvulus Family 120 



Borage Family 123 



Vervain Family 128 



Mint Family 129 



Figwort Family 133 



Ribwort or Plantain Family 135 



Madder or Bedstraw Family 140 



Sunflower Family 141 



Explanation of Botanical Terms 181 



Index 183 



