it looks like there could be an emerging high technology in agriculture , where we might see real departure from traditional ways of using land . while it appropriate to be careful about this kind of change , the need to greatly increase productivity should drive us to look for better ways . one of the most remarkable things about vineyard practice is that most of it involves planting configurations that leave much of the ground idle . roots extend quite a lot , but it can be seen in irrigation arrangements that root ball widths more than about a meter would go beyond water supply zones . this suggests that root space does not justify wide row spacing . where rain water is significant , and where cover crops are used , a study has shown that roots of the cover crop capture moisture and roots of vines seek moisture from areas not under the cover crop , and this also suggests that the cover crop space might sometimes be of little value . there are benefits of cover crops , but were the rows closer together , maybe not as much as generally thought . most realize that the ultimate decision about row spacing depends on the width of available tractors . this is of course good sense , but it also makes sense to try to do better . production tractors are generally wide because they are designed for stability which comes from widely spaced tire tracks . maybe not fully realized is the effect of these heavy machines , where pressure caused below ground is hard - pan generating , and this , repeated over time can be a cause of serious degradation of the field . a question might be whether this is why american vineyards are said to have useful life of about 27 years . another question is whether the great horse caused this kind of soil damage which might explain some of the need to leave fields to lie fallow . the tractor involved with this invention is built to limit this damage with its large area footprint holding up a light weight vehicle . a simple but penetrating analysis of vineyards from satellite photography , as well as much publicity photography , shows that a lot of sun energy is wasted in direct impact with the ground . if there is any point in warming the ground , it is not so important that vineyards be arranged for this . the present invention arranges to capture most sun benefit with well configured foliage , where the leaves in canopies stop the sun from ground warming . this arrangement involves overhead canopies . the standard tractor is contrary to this also , and though overhead canopies are known where they are large enough for passage of a standard tractor configuration there are reasons to avoid large plants if high quality wine grapes are to be grown . world vineyard operations for growing wine grapes are generally involved with small vines where pruning is done to establish a fruit zone that is within reach of a worker standing or kneeling on the ground . viticulturists discuss plant vigor as being approximately fixed for a particular plant of a given variety . this vigor must be channeled for development of root structure , foliage , and grapes themselves . they say that a plant that develops too much foliage can produce watery and less flavorful grapes . pruning instructions bear this out . this experience argues for not setting up a vineyard for large vines . consequently , it appears that to establish a vineyard with overhead canopies , the canopies need to be lower than would be possible where a standard tractor with seat well above the largest wheel axis and a rider sitting upright on the seat was the basis for sizing the canopy . even if the standard tractor were made narrow , down to 30 inches wide , the overhead clearance would be much higher than that required for the narrow and low tractor involved here . the new provision for the worker to sit very close to the ground enables a whole new shape for plants . prior art is explained in fig1 where a concept vehicle is shown in a vineyard setting , with a ground section shown 2 . the concept vehicle 1 addressed the need to put a worker 53 in easy reach of low growing crops , so the worker seat allowed a very low position . the vehicle width 5 was such that it could fit between rows 4 and travel with forward direction indicated 9 . ground clearance 6 was sufficient for field work . non specific vegetation 52 was shown for perspective purposes . at time of writing this earlier application it was not known that vegetation 52 shown here was virtually non - existent in vineyard practice . prior art is further explained in fig2 where the previous concept vehicle 1 is shown to enable detail viewing . the field surface 2 is as before . worker placeholder 53 is now visible . vineyard plant trunks 51 are now visible in rows 4 that are very close to sides of vehicle 1 . only part of representative upper vegetation 52 remains . this vehicle was constructed to be as light as possible with frame 20 being of a unit body nature with a box frame having upper beams 21 to provide rigidity without excessive weight . having removed part of the upper vegetation 52 , fruiting zones 10 are depicted that were not specified in the prior art document . the vehicle concept shown in prior art was at that time defined in terms of relationships of its parts , without specificity as to absolute dimensions . fig3 is now presented on the basis of the resulting concept vehicle 31 . the present width 35 now determines position of the rows 34 necessary to allow vehicle passage . front wheels 36 are now shown with rigid surfaces like the rear wheel surface , and rear wheel 33 is large with a diameter of 38 inches . vegetation 52 from prior art is now shown interfering with head 37 of worker placeholder which is now a little larger than previously shown . fig3 also shows the lowered frame structure 32 that was introduced to aid worker visibility as well as implement a significant center of gravity lowering improvement . the rear wheel 33 is shown without its safety cover which is now made of light gauge steel on a minimal frame for ridgidizing effect . implementation of the prior art invention proceeded with broad applications in mind , but were generally addressing the need to help field workers do work on low growing crops . it gradually became known that a more specific target market was needed , and growth trends in the vineyard market made that an obvious choice , as did living not far from famous wine growing regions . surprising resistance was encountered which made it appropriate to address vineyard topics in detail . as a result , it was discovered that more of vineyard design project was required that went beyond simply suggesting narrow spacing as a way to achieve large profit gains by using the narrow vehicle . in competing with existing practice it seemed useful to suggest use of european traditional methods , which included narrow rows . but european vineyard operators seemed to be also facing labor cost issues , and mechanization there was also desired . european mechanization included over - the - row tractors which also enabled narrow row space , and though these tended to be expensive , they seemed to make our narrow tractor less than absolutely necessary . but there is something very different about the narrow vehicle for in - row operation , that being that the low seated worker meant that the overhead clearance was also low . this is a feature that having dramatic advantage compared to the over the row tractors , or even the noble horse . this all came together after observing photographs and satellite imagery where shadows on the ground were very small compared to the otherwise sunlit ground . “ growing dirt ” is not the right way to effectively utilize land . fig4 shows the vineyard configuration that specifically answers this challenge . canopies 41 , 42 specifically provide nearly full sun capture over a single surface of leaves that are appropriately directed . leaves on this surface function throughout the sunlight duration . for those that use tall vehicles , whether they are standard tractors , cavals , bobards , or horses , this configuration is not possible . in contrast , the prior art tractor and successors to put a worker low , are by nature also very low . so such would work effectively under the canopies 41 , 42 as shown . without the low tractor , nobody could like the canopy design shown here . but surprisingly , european tradition could be significantly improved on using the low and narrow tractor now available . fig4 shows realism of a gap 43 between canopies but worker placeholder head is not interfering with canopy of this presently specified invention . fruiting zone 10 is positioned under the canopy , which may be adjusted to allow sun penetration to grape clusters as directed by experienced pruners . canopy clearance 43 and height of sun capture surface are now shown . a thin 45 canopy feature is also important for minimizing non - functional vegetation . leaves doing little for sun capture are removed to establish and maintain this thin dimension . fig5 shows the same canopy arrangements with canopy support wires 55 , 52 and fruit zone control wires 54 . the canopy support wires function in combination with support structures that the wires are attached to as foliage develops ; starting with the wire being free at the beginning of the growing season but then being lifted to raise the canopy to its horizontal configuration with the needed clearance underneath . space between control wires 53 is approximately 20 inches to enable a worker to stand or ride between these wires as canopy development takes place . the fruit zone control wires 54 are variably useful depending on the style of pruning . the invention here described is in terms of a system that enables manual farm work . however , the scope of the invention includes , in particular , robotic versions of equipment here discussed . the scope of the invention is to be defined by the appended claims .
here invented is a vineyard configuration for maximizing use of the resources of land and sun . it is a configuration based on a low and narrow tractor that enables both narrow spacing of rows of plants in vineyards and formation of canopies that enable nearly complete usage of impinging sunlight .