COVER CROPS in South African Vineyards

TABLE OF CONTENTS

CHAPTER 6 EFFECT OF COVER CROPS ON WATER USE . .............................................................................................. 118 Coastal region ..........................................................................................................119 Reference list .......................................................................................................120 Breede River valley .................................................................................................120 Reference list .......................................................................................................121 Olifants River valley ................................................................................................122 Reference list .......................................................................................................123 CHAPTER 7 EFFECT OF COVER CROPS ON SOIL CARBON AND MINERALS . ...........................................................124 Breede River valley .................................................................................................125 Organic carbon ....................................................................................................126 Nitrogen in the soil ..............................................................................................127 Other minerals .....................................................................................................129 Reference list .......................................................................................................130 Coastal region ..........................................................................................................130 Organic carbon ....................................................................................................131 Nitrogen in the soil ..............................................................................................132 Other minerals .....................................................................................................134 Reference list .......................................................................................................134 Olifants River valley ................................................................................................135 Organic carbon ....................................................................................................135 Nitrogen in the soil ..............................................................................................136 Other minerals .....................................................................................................139 Reference list .......................................................................................................139 CHAPTER 8 EFFECT OF COVER CROPS ON GRAPEVINE NUTRITION AND PERFORMANCE .......................140 Breede River valley .................................................................................................141 Nitrogen status of vines . ....................................................................................142 Vegetative growth and grape yield ...................................................................145 Grape and wine quality ......................................................................................147 Root distribution ..................................................................................................147 Reference list .......................................................................................................149 Coastal region ..........................................................................................................149 Nitrogen status of vines . ....................................................................................149

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