LIST OF FIGURES

Page No.

Figure 1 Soil Formation....................................   11

Figure 2 Principal Horizons in a Soil Body.................   12

Figure 3 Soil Textural Triangle........... „..............   13

Figure 4 Sam Asian of the Soil Conservation Service........   16

Figure 5 Effects of Soil Erosion...........................   18

Figure 6 Straw Mulch for Erosion Control...................   19

Figure 7 Bee Hives in Grove................................ 21

Figure 8 Tree Spacing for Fuerte and Zutano................ 27

Figure 9 Tree Spacing for Hass............................. 27

Figure 10 Tree Spacing for Bacon, Reed and Zutano.......... 28

Figure 11 Spitter Irrigation in Young Grove................ 32

Figure 12 Closeup of a Drip System------------------------- ........................ 32

Figure 13 Typical Drip Irrigation System Plan.............. 33

Figure 14 Overcoming Obstacles with PVC Hose............... 34

Figure 15 Water Head of a Drip Irrigation System........... 34

Figure 16 Avocado Tree Physiology.......................... 39

Figure 17 August Fruit Drop................................ 55

Figure 18 Nursery Trees and Planting Diagrams.............. 61

Figure 19 Instruments Used to Measure Soil Moisture........ 68

Figure 20 Weeds Around Young Macadamia Tree................ 91

Figure 21 Herbicide Sprayer for Weed Control............... 93

Figure 22 Tools for Girdling Avocado Trees................. 123

Figure 23 Girdling a Fuerte Avocado........................ 124

Figure 24 Healed Girdling Wounds........................... 125

Figure 25 Young Grafts on a Topworked Tree................. 128

Figure 26 Limb Supports (Props)............................ 132

Figure 27 Wind Damage to a Grafted Tree.................... 133

Figure 28 Closeup of Tree in Fig. 27....................... 133

Figure 29 Prunings Around Base of an Avocado Tree.......... 136

Figure 30 Protection from Vandalism by Fencing Water Head.. 142

Figure 31 Fencing for Grove Protection..................... 142

Figure 32 Avocado Transportation Certificate............... 157

Figure 33 Packing Container and Fruit Size Chart........... 157

Figure 34 Organic Fertilizer for Avocado Grove. *......... 169

Figure 35 Pods of the Santa Fe Variety of Carob............ 201

Figure 36 The Spain Variety of Cherimoya................... 202

Figure 37 Fruit on Branch of a Cherimoya Tree.............. 202

Figure 38 Fruit of the Nazemetz Variety of Feijoa.......... 204

Figure 39 Pruned Fig Trees............................................. 208

Figure 40 Fruit of the Red Indian Variety of Guava......... 210

Figure 41 The Vista Variety Jojoba Bush.................... 210

Figure 42 Kiwifruit Vine................................... 214

Figure 43 Limes Replacing Root Rot Infected Avocados....... 216

Figure 44 The Gate Variety of Tetraphylla Macadamia........ 218

Figure 45 The Keauhou Variety of Integrifolia Macadamia.... 218

Figure 46 Young Grafted Tree of the Thomson Variety of Mango 220

Figure 47 Fruit of the Thomson Variety of Mango............ 220

Figure 48 Fruit of the Fuyu Variety of Persinmon........... 223

Figure 49 Fruit of the Hachiya Variety of Persiimion....... 223

Figure 50 Fruit of the Wonderful Variety of Pomegranate.... 223

Figure 51 Fruit of the Sue Belle Variety of Sapote......... 226

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LIST OF TABLES

Page No.

Table  1  Soils and Root Rot Hazard Related to Soil Series  14

Table  2  Comparison of Drip and Sprinkler Irrigation Systems         30

Table  3  Climatic Zones............................... 46

Table  4  Avocado Variety Characteristics.................   46

Table  5  Average Harvest Season of Commercial Varieties    47

Table  6  California Avocado Acreage 1969-1981............ 51

Table  7  Irrigation Application Guide....................   65

Table  8  Estimating Soil Moisture by the "Feel" Method     71

Table  9  Water Unit Equivalents and Formulas.............   75

Table  10  Major and Minor Chemical Elements...............   79

Table  11  Conrnon Nitrogenous Chemicals and Formulas....... 81

Table  12  Nitrogen Fertilization of Avocados by Irrigation System...  83

Table  13  Nitrogen Fertilization of Avocados by Hand.......   84

Table  14  Average Analysis of Fertilizers.................   85

Table  15  Zinc Application............................... 86

Table  16  Ranges of Elements in Avocado Leaves (Leaf Analysis)  88

Table  17  Suggested Nitrogen Levels in Avocado Leaves (Leaf Analysis) 90

Table  18  Orchard Operations Calendar..................... 94

Table  19  Maturity Season of a Few Varieties of Avocados    147

Table 20  Acreage, Yield per Acre, Total Production and Returns       168

LIST OF CHARTS

Page No.

The Remarkable Avocado Flower..............   40

Soil pH and Availability of Plant Nutrients    77

Forms and Transformations of Nitrogen......   80

Pesticide Use Warning—Read the Label.... 95

Breakfast, Lunch and Dinner Menus......... 194

California Avocado Composition............ 196

LIST OF LEAFLETS

Page No.

Control of Squirrels and Diagrams for Bait Boxes.... 99

Prevention and Control of Root Rot........ 107

Los Angeles Wholesale Market Report....... 145

How to Pick Avocados—Treat Them Gently. 152

Avocado Orchard Development Costs......... 178

Avocado Production Costs................. 184

MISCELLANEOUS

Page    No.

Cover of California Avocado Advisor....... 162

Cartoon   Isadora and Her Avocado Plant 164

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