Viticultural practices in LI–Part II: background.

In exploring viticultural practices in Long Island, I intend to examine the practice of sustainable farming, which includes organic and Biodynamic® agriculture.  My original, first posting on 15 June 2010, Can 100% Organic Grapes be Grown in Long Island?, provoked some interesting and even useful responses.  I have since renamed it Can 100% Certified Organic Grapes be Grown in Long Island?  given the developments at Shinn Estate that have taken place since that June posting.  The series now continues with this posting (now updated to May 2011) and followed by those that deal with the individual vineyards of Long Island.

In order to avoid repeating myself with each report on a vineyard, I want to point out some factors that I believe appertain to most of the vineyards that I’ll be writing about—which is to say, all of the ones in LI, of which there are about currently forty-one (though there are about forty-six wineries, several buy their grapes from growers).

Geology & Soils

Geologically, Long Island is extensively formed by two glacial moraine spines, with a large, sandy outwash plain extending south to the Atlantic Ocean.  These moraines consist largely of gravel and loose rock that would become part of the island’s soils during the two most recent extensions of Wisconsin glaciation during the Ice Age some 21,000 years ago (19,000 BCE).  The northern, or Harbor Hill, moraine, directly runs along the North Shore of Long Island at points.  The more southerly moraine, called the Ronkonkoma moraine, forms the “backbone” of Long Island; it runs primarily through the very center of Long Island.  The land to the south of the Ronkonkoma, running to the South Shore, is the outwash plain of the last glacier. When the glaciers melted and receded northward, their moraines and outwash produced the difference between the North Shore and the South Shore soils and beaches.

A General Soil Map (below), devised by the USDA Soil Conservation Service and the Cornell University Agricultural Experiment Station in 1972, shows the different kinds of soils that dominate the East End of Suffolk County, the part of Long Island that is home to most of the vineyards there.

The soil associations (or types) for Suffolk County as listed in the General Soil Map (and relevant to viticulture) are as follows:

1. Carver-Plymouth-Riverhead association [N. shore of the North Fork, extending across the Fork at Mattituck and then running East along the S. shore of Great Peconic Bay to Southold]:  Deep, rolling, excessively drained and well-drained, coarse-textured and moderately coarse-textured soils on moraines
2. Haven-Riverhead association [running from Brookhaven along the southern edge of one.  With an interruption at Mattituck, then extending as far as Orient Point; this is the dominant soil of the North Fork]:  Deep, nearly level to gently sloping, well-drained, medium-textured and moderately coarse-textured soils on outwash plains
3. Plymouth-Carver association [runs across the middle of the West-East axis of the county, encompassing Riverhead just south of 2.  It then extends into the Hamptons or South Fork as far as East Hampton but at no point touches the south shore.]  rolling and hilly:  Deep, excessively-drained, coarse-textured soils on moraines [the Ronkonkoma Moraine].

6.   Bridgehampton-Haven association [actually runs immediately adjacent to, and south of, 3.]: Deep, nearly level to gently sloping, well-drained to moderately well-drained, medium-textured soils on outwash plains

Textures refer to surface layer in major soils of each association.  [A caveat regarding the use of the map says,] The map is . . . meant for general planning rather than a basis for decisions on the use of specific tracts.

(There are ten soil types shown on the map, but we list only the four that form part of the terroir of the vineyards of the East End.)

With respect to the soil types in the North Fork and Hamptons AVAs, Louisa Thomas Hargrave wrote an article, “The Dirt Below Our Feet,” in the Spring 2011 issue of Edible East End, in which she made some important observations:

Every discussion of a wine region’s quality begins with the soil.  Going back to ancient Roman times, around ad 50, Lucius Columella advised, in his treatise on viticulture, De Re Rustica (“On Agriculture”), “Before you plant a piece of ground with vines, you should examine what sort of flavor it has; for it will give the wine a similar taste. The flavor can be ascertained…if you soak the earth in water and taste the water when the earth has hone to the bottom.  Sandy soil under which there is sweet moisture is the most suitable for vines…any soil which is split during the summer is useless for vines and trees.”

The “useless” soil that splits is clay, a colloidal suspension of particles similar to Jell-O. Clay retains too much moisture when it rains, making the tender roots of wine grapevines rot; it withholds nutrients from the vine when the weather is dry.

There is little clay on the East End of Long Island, except in specific and easily identified veins. We have remarkably uniform sandy soils here that vary in available topsoil (loamy organic matter), but all contain the same fundamental yet complex mixture of minerals.  These soils are ranked by the U.S. Soils Conservation Service as “1-1,” the most auspicious rating for agriculture. Any single handful of Long Island soil will show the reflective glint of mica; the dull gray of granite; the mellow pink, salmon and white of quartz; the red and ochre of sandstone; and black bits of volcanic matter. To describe them simply as “sandy loam” fails to acknowledge the profound effect that having this mixture of minerals must have on the vibrancy and dynamic quality of Long Island’s wines.

It should also be pointed out that Long Island soil, regardless of its composition, tends to have a rather low pH, which is to say too acidic for Vitis vinifera grapes to grow well.  It needs the addition of lime to balance the pH and is something that nearly every vineyard must do to get itself established for vinifera.  It can take years—Paumanok Vineyards was adding lime to its vineyards every year for twenty years before it was able to relax the practice.  It nevertheless has to be done again every few years when the pH gets too low again, as it appears that the added lime may get leached out of the soil over time.

Climate

Overall, Long Island displays a cool maritime climate.  The brutal summer heat seen in the Iberian Peninsula, which is at the same latitude, is tempered in the Hamptons AVA by the Labrador Current which moves up the eastern Atlantic Ocean.  Summer temperatures are also moderated by Little Peconic Bay to its north.  The North Fork enjoys the moderating influences of Long Island Sound.  These same bodies of water help to temper the effects of the Canadian air masses that move in during the winter.  The influence of these waters helps prevent late spring frosts which can kill young grape buds.  The cumulative effect is an effective lengthening of the growing season to approximately 210-220 days.  Wine-grape varietals can thrive here, as they can grow better and ripen further than just about anywhere in the U.S. outside of California.  The North Fork is such a narrow band of farmland, situated between the bay and the sound that virtually all of the vineyards or near or on the water.  According to the Appellation American Website:

Despite being next door to each other, there are notable differences between the South Fork and the warmer North Fork. The South Fork is more exposed to onshore Atlantic breezes, delaying bud-break by as much as three weeks. Even after bud-break, the area is frequently foggy, keeping early season temperatures and sunshine hours lower than on the North Fork. By the end of the growing season, the seemingly subtle weather differences between the Forks add up to quite different overall climates. The Hamptons are generally very cold to moderately cool, while the North Fork is moderately cool to relatively warm. The damper silt and loam soils of The Hamptons, along with climactic differences, create a unique style, with wines from The Hamptons generally being more restrained and less fruit-forward than wines from the North Fork.

Viticultural Practices

Regardless of the different terroirs of either Fork, the first point that I’d like to make is that, based on my visits, so far, to Wölffer Estate and Channing Daughters in the Hamptons AVA, and to Bedell Cellars, Lenz, Macari, The Old Field Vineyards, Palmer, Paumanok, Peconic Bay, and Shinn Estate in the North Fork AVA, the standards of vineyard management are of a very high order.  The neatness of the rows of vines, their careful pruning and training (most, if not all, are using Double Cordon trained on two wires with Vertical Shoot Positioning, or VSP, and cane pruning), the use of cover crops between rows, and much else besides, attest to the high standards to which the vineyard managers aspire.  I expect that all the vineyards on the two forks are attempting some form of sustainable farming, though the kind of sustainable work will probably vary considerably across the gamut of over forty vineyards.

A handful are endeavoring to farm organically and/or biodynamically, though only a single vineyard, Shinn Estate, is actually working to obtain actual certification for both.  None of this is to say that a vineyard that does not seek to grow organic or biodynamic grapes is the lesser for it.  Excellent, even great wines have been and shall continue to be produced whether farmed organically or not.  Indeed, as I pointed out at the beginning of my first post, there is no proven correlation of quality of a wine because it is made with organic or biodynamic grapes.  A case in point is the famous and incredibly expensive wine of the Domaine de la Romanée Conti, in Burgundy.  It has been long acknowledged as the source of some of the greatest red and white wines of all of France, and this was the case before it was converted to biodynamic farming, and continues to be the case today.  Part of what makes it so difficult to quantify the quality of a wine made by either method is that fact that there is vintage variation every year, due primarily to factors of weather and climate.  Thus, there is no objective way of being sure that viticultural practice was the dominant reason for the quality of a particular vintage, rather than the weather of a particular season.  Nevertheless, those who practice organic/biodynamic viticulture do aver that it is reflected in the wine.

There is no intention whatsoever in my series to judge a vineyard because it does or does not grow or intend to grow organic grapes.  (Indeed, wineries that are technically organic can still choose not to be certified.  Among the many reasons for this, for example, are that a winery may not want the added costs and the bureaucracy entailed in registering, or a winery may disagree with the government standards.  Whatever the case, such wineries are not allowed to use the term organic on their labels.)  In any event, the point of this series is to understand the reasons for choosing a particular approach to grape production over another.  We want to understand why Long Island vineyards do what they do before we go on to explore their methods of vinification, for it between what is done in the vineyard and what happens in the winery that helps to determine the quality of the wine that is produced.  The wines from Long Island have long been improving since those first, tentative years going back to the 1970s and in recent years are receiving their due recognition for this in the form of positive reviews, awards, and high scores for individual bottlings.  Part of the purpose of this series is ultimately to understand how it is that this is happening.

Definitions

• AVA or American Viticultural Area: An area defined by a unique geology and climate that is distinctive from other vine-growing areas and hence that produces wines of a distinctive overall character.  There are none of the restrictions as to varieties planted, vine density, allowable harvest per acre, or any of the other limitations that exist in European appellations, such as the French Appellation d’Origine Contrôlée (AOC).  Long Island has three AVAs, all applied for to the TTB (Alcohol and Tobacco Tax and Trade Bureau) which administers the program, in the mid-1980s: The Hamptons, Long Island AVA, the North Fork of Long Island AVA, and the Long Island AVA.
• Biodynamic®, or Demeter USA, certification; also, Demeter USA, FAQ, Biodynamic wine (PDF file).  Also, see an excellent discussion in a 5-part series beginning with New York Cork Report, Biodynamics, Part I, by Tom Mansell, along with the ensuing debate in the comments that follow each of the postings.  There is also a controversial series against biodynamics by Stuart Smith, a winemaker in California, called Biodynamics is a Hoax, a polemic that is worth reading, along with the comments in response.
• Bordeaux Mix:  A widely-used type of fungicide that mixes copper sulfate and lime, first used in Bordeaux in the 1880s; see Univ. of Calif., Davis, Pesticide notes
• Compost Tea:  A type of natural compost mixed with water for distribution in liquid form (it may be seen as agricultural homeopathy); see National Sustainable Agriculture Information Service, Compost Tea Notes
• Copper Sulfate:  A widely-used industrial pesticide, allowed in both organic and Biodynamic farming within specified limits: see  Cornell Extension Toxicology Network (ExToxNet), Pesticide Information Profile, copper sulfate
• Cover crops: Vegetation that is either deliberately planted between vineyard rows (e.g., clover, to replenish nitrogen in the soil) or weeds that are naturally allowed to grow between and into rows (the Biodynamic approach); see UC Davis, Cover Crop Selection and Management for Vineyards
• Integrated Pest Management (IPM):  EPA, Factsheet on IPM
• Organic Certification:  USDA, National Organic Program, Organic Certification
• Regalia:  A biologically-based pesticide; see Marrone Bio-Innovations, Products, Regalia
• Serenade: A biologically-based pesticide; see PAN Pesticide Database, Products–Serenade
• Stylet oil:  defined in the industry as a Technical Grade White Mineral Oil, it is used as a biodegradable fungicide and insecticide in integrated pest management programs.
• Sustainable agriculture:  according to Mary V. Gold, on the USDA Website, “Some terms defy definition. ‘Sustainable agriculture’ has become one of them. In such a quickly changing world, can anything be sustainable? What do we want to sustain? How can we implement such a nebulous goal? . . . If nothing else, the term ‘sustainable agriculture’ has provided talking points, a sense of direction, and an urgency, that has sparked much excitement and innovative thinking in the agricultural world.”  Follow this interesting, full explanation of the term at USDA, Sustainable Agriculture definition.  Another excellent source for information about sustainable agriculture is to be found on the NY State VineBalance Program website, which is dedicated to sustainable practices in NY State vineyards.
• Vertical Shoot Positioning:  is a training system used with single or double Guyot, cane-pruned training, or with a Cordon, spur-pruned system.  VSP is very common in cool and/or humid climate regions with low to moderate vigorous growth, as it encourages better air flow through the vine.  This is accomplished by making all the shoots grow vertically, with no vegetative vine growth allowed below the cordon/cane.  The increase in air flow helps prevent problems associated with disease and also allows the fruit to dry out more quickly after it rains.

Both cluster thinning and harvesting are generally made easier, given that there is better access to the fruit.  The objective is to train the shoots so as to create a narrow layer that provides good sunlight exposure and air flow in the fruiting zone of the canopy.  Each shoot is thus trained to grow vertically by attaching it to movable catch wires.  The shoot’s length can easily be controlled by pruning any growth above the top catch wire.  The fruiting zone is generally kept at waist height, which makes it more convenient for the vineyard workers, given that the vineyard rows are worked throughout the season.)

For a full explanation of VSP, see Cornell Univ. Agriculture Extension, Training, and Trellising Vinifera Vines.