Overall Planning for Developing a New Vineyard: Site Selection and Assessment. Ed Hellman Viticulture Extension Specialist
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1 Overall Planning for Developing a New Vineyard: Site Selection and Assessment Ed Hellman Viticulture Extension Specialist
2 Critical Site Selection Criteria Climate (plant adapted varieties) Diseases and Pests (climate & soil influence) Irrigation water availability Irrigation water quality Soil depth Soil drainage Cold air drainage (topography)
3 Where should I plant my vineyard? Ideal Situation: Search for the best location Common Situation: The family ranch
4 Ideal Situation: Search for the best location
5 Ideal Situation: Search for the best location Macroclimate (Region) Temperature Sunlight Precipitation Relative Humidity
6 Average Annual Precipitation
7 Pierce s disease Probability Map Cotton Root Rot Losses Map Heavy Light None
8 Irrigation Water Availability
9 Spatial Variability of General Soil Types Soil Associations Texas High Plains AVA Texas Hill Country AVA
10 Successful Vineyards Exist on Many Different Soils
11 Other Site Selection Considerations Proximity to market American Viticultural Area
12
13 American Viticultural Areas (AVA) of Texas Texas High Plains Texoma Mesilla Valley Texas Davis Mountains Escondido Valley Texas Hill Country Bell Mountain Fredericksburg in the Texas Hill Country
14 Site Assessment the local level The family ranch
15 Critical Site Selection Criteria Climate (plant adapted varieties) Diseases and Pests (climate & soil influence) Irrigation water availability Irrigation water quality Soil depth Soil drainage Cold air drainage (topography)
16 Site Assessment the local level Macroclimate (Region) Temperature Sunlight Precipitation Relative Humidity Mesoclimate (Site) Temperature Sunlight Precipitation Relative Humidity Wind & air circulation Cold air drainage (topography)
17 Cold Air Flows Downhill Tony Wolf Cooperative Extension Virginia
18 Avoid Frost Pockets
19 Critical Site Selection Criteria Climate (plant adapted varieties) Diseases and Pests (climate & soil influence) Irrigation water availability Irrigation water quality Soil depth Soil drainage Cold air drainage (topography)
20 Great Vineyards Program Potential Vineyard Site Assessment Form
21 Irrigation Water Quantity & Quality
22 Irrigation Water Needs Texas High Plains (peak ET o ) Reference Evapotranspiration ET o = in/day Grape Crop Coefficent K c = 0.50 Grape ET = in/day X 0.50 = in/day Vineyard water use = in/day
23 Irrigation Water Needs Vineyard water use = in/day 1 acre-inch = 27, 154 gallons/acre Daily replacement need = 27,154 gal/a X in Daily replacement need = 3500 gal/acre 3,500 gal/acre 480 min (pump time) = 7.3 gpm Minimum well output = 7.3 gal/min/acre
24 Irrigation Water Needs Minimum well output = 7.3 gal/min/acre Calculation Assumptions: Irrigation supplies 100% water needs Irrigation replaces 100% Grape ET (50-75% replacement sufficient if no cover crop) Plan for well output to decline in future Plan for more than current needs Perhaps 2X output: 15 gal/min/acre
25 Irrigation Water Quality for Grapes Salinity Electrical Conductivity Total Dissolved Solids Increasing Problems > 1.0 mmhos/cm > 640 ppm
26 Salt Buildup in Soil
27 Irrigation Water Quality for Grapes Salinity Electrical Conductivity Total Dissolved Solids Increasing Problems > 1.0 mmhos/cm > 640 ppm Soil Permeability to Water Sodium Absorption Ratio (SAR) Increasing Problems SAR 6
28 Water Infiltration Rate (Permeability) Irrigation water with high sodium levels causes soil clay particles to disperse Water infiltration is reduced
29 Irrigation Water Mineral Toxicity Increasing Problems Sodium Chloride Boron > 460 ppm 140 ppm 1 ppm
30 Salt Injury Furrow Irrigation
31 Vineyard Site Assessment: Soils
32 General Criteria for a Suitable Vineyard Soil Depth of at least 3 ft (Great Vineyards minimum 2 ft) Good water-holding capacity Moderate to high water infiltration rate Good internal drainage ph between in the root zone Absence of toxic concentrations of salts or nutrients Source: Nicholas, Soil, Irrigation and Nutrition
33 Soil Physical Properties
34 Soil Depth Influences Water Availability
35 Available Water Capacity Good available water capacity 0.10 to 0.20 inches water per inch soil depth
36 High Available Water Capacity + High Rainfall (or irrigation) = High Vigor
37 Water Infiltration Rate Hydrologic soil group = Moderate or high infiltration rate Saturated Hydraulic Conductivity micro m/sec
38 Good internal water drainage Drainage Class: Moderately well-drained to well-drained Saturated Hydraulic Conductivity micro m/sec
39 Soil Chemical Properties
40 ph 5.2 to 8.2 Absence of toxicity Sodium < 690 mg/l Chloride < 350 mg/l Boron < 1 mg/l Salinity conductivity < 2.5 mmhos/cm
41 Where to Find Soil Information?
42 Soil Survey for Entire U.S.
43 Find your location & outline it
44 Area of Interest outlined in red
45 Select Soil Map tab
46 Soil Map
47 Select Soil Data Explore, Soil Reports
48 Report Physical Soil Properties
49 Report Chemical Soil Properties
50 Verify Soil Physical Properties Dig soil pits throughout site Compare with soil survey Observe: Depth Texture Variability Problems
51 Verify Soil Chemical Properties Collect soil samples from throughout site
52 Soil Conditions Favorable to Cotton Root Rot Alkaline soil ph > 7.3 High in Calcium Bicarbonate Low in Sodium High soil temperature High soil moisture traps CO 2 (clay soils)
53 Management of a Less-Than-Ideal Vineyard Soil Pre-planting Remediation Options: Increase rooting depth by deep-ripping with chisel plow Improve soil drainage with drain tile system Modify ph with amendments (lime, sulfur) Fertilizer additions if necessary (P, Mg, K)
54 Management of a High-Capacity Vineyard Soil Vineyard Development and Post-planting: Low-vigor rootstocks? Competitive cover crop in alleys (maintenance required) Divided canopy training system Canopy management (hedging, leaf-pulling)
55 Less than Ideal Vineyard Site Soil Drainage Frost Pocket Cotton Root Rot
56 Less than Ideal Vineyard Site Compromise accept lower yields accept lower fruit quality accept higher loss risk Reduced Returns Remediation modify soil drainage hedging vigorous canopy disease & pest control practices frost protection Increased Costs
57 Critical Site Selection Criteria Climate (plant adapted varieties) Diseases and Pests (climate & soil influence) Irrigation water availability Irrigation water quality Soil depth Soil drainage Cold air drainage (topography)
58 Other Site Selection Considerations Good roads Good neighbors
59 You only get one chance to select your vineyard location
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