New York Agricultural Experiment Station. 591 



for weighing wood made impossible the taking of data on wood 

 production. So, too, the interval that would elapse between the 

 gathering of leaves and weighing was so great that such data would 

 be valueless. All yields have been figured on the acre basis and 

 as the greater number of the vineyards were set 8x8 feet, or 680 

 vines per acre, all have been computed for this number of plants 

 for sake of uniformity. Only the actual number of vines in a plat 

 have been considered in computing the average per vine. Thus, 

 if a row originally contained 66 vines but 24 were missing, 42 vines 

 alone have produced the fruit for that plat and the average was 

 made from the 42. 



JENNINGS VINEYARD. 



The Jennings vineyard is located on a level piece of Dunkirk 

 shale loam varying to Dunkirk clay loam. The part on the shale 

 loam is fairly well drained naturally while the portion on the clay 

 loam is decidedly wet. There is no artificial underdrainage. The 

 vineyard is a young and promising one for this type of soil. The 

 rows, if no vines were missing, would contain 66 vines. The actual 

 number varies from 42 to 66. Each plat consists of a single row 

 separated from the others by discard rows. The plats are dupli- 

 cated. The rows extend in a general north and south direction. 

 The fruit from the discard rows was not weighed. This vineyard 

 was sprayed once each year during 1910 and 1911 for the control 

 of grape root-worm and powdery mildew. 



Table XI gives the treatment of the plats and their relative order 

 in the vineyard together with the yields in tons per acre for the 

 years that the experiment ran, and the two-year average. 



Careful study of the data does not show striking consistent 

 differences between the treated plats nor between those treated and 

 untreated. A comparison of Plats 2, 3, 4 and 5 would seem to 

 indicate that there was a slight gain from the use of nitrogen, but 

 in no case is it sufficient to pay for the fertilizer. Again comparing 

 Plats 12, 13 and 14 it would seem that there has been some gain 

 from the use of stable manure, but even here the increase is not 

 enough to buy the manure and apply it. 



