Xii CONTENTS 



PAGE 



Fertilizers for Pasture and Grassland 98 



Kinds of Fertilizers and Amounts to Apply 99 



The Eternal Battle with Weeds 100 



Questions 102 



Bibliography 103 



CHAPTER VI 

 RECOGNIZING AND CORRECTING A DECLINING FORAGE YIELD 



How Destructive Grazing May Be Recognized 104 



Old or Empirical Method 104 



New or Scientific Method 105 



Conspicuous Signs of Overgrazing 106 



Indicators of Slight Departures in Grazing Capacity 107 



Type Stages of Indicator Plants 107 



Climax Herbaceous Stage 108 



Destruction of the Wheatgrass Cover 108 



Forage Production in 



Mixed Grass and Weed Stage in 



Destruction of the Porcupinegrass-Yellowbrush Cover 113 



Forage Production 113 



Second or Late Weed Stage 113 



Destruction of the Foxglove-Sweet Sage- Yarrow Cover 114 



Forage Production 115 



First or Early Weed Stage 115 



Forage Production 115 



Effect of Grazing on the Development of Vegetation 117 



Vegetation on Driveways and Bed Grounds 119 



Revegetation of Bed Grounds 120 



Revegetation of Lands Grazed Each Year before Seed Maturity 



as Compared with That of Yearlong Protected Areas. . . 124 



Use of Indicator Plants 127 



How to Recognize Pasture Improvement or Depletion 127 



Reliable Indicator Plants 128 



Questions 130 



Bibliography 131 



CHAPTER VII 



PRINCIPAL INTRODUCED FORAGE GRASSES 



Classification of Cultivated Plants 132 



Kentucky Bluegrass 132 



Canada Bluegrass i35 



Bermudagrass I35 



