REPORT OP COMMITTEE ON PUBLICATION 65 



In 1910, 1911, 1912, 1913 2nd 1914 dried blood was substituted for the 

 cotton seed meal owing to the difficulty of obtaining the meal. The amount 

 of dried blood used in 1910 was at the rate of 560 pounds per acre. In 1911, 

 1912, 1913 and 1914 but 400 pounds per acre were applied. The difference 

 was made necessary because of the variability of the nitrogen content of the 

 blood in 1910 and the four years following. 



The lime applications have been made at three year intervals. Thus far 

 two applications have been made, one of air slacked lime and the other an 

 equivalent amount of ground limestone. 



The fertilizers were purchased in the open market at prevailing prices 

 and were "home mixed." 



The lime was broadcasted and harrowed in after spring plowing. 



In 1909 the cotton seed meal and nitrate of soda were mixed with the other 

 materials, broadcasted and plowed under, but in 1910, 1911, 1912, 1913 and 1914 

 the dried blood and nitrate of soda were withheld from the mixtures and two 

 applications made of them, one shortly after growth started and the second 

 two or three weeks later. In both cases the nitrogen was broadcasted and 

 lightly harrow r ed in. The acid phosphate and sulphate of potash were applied 

 early and plowed under. 



Using these materials at the rates just given we applied in 1909, 72 

 pounds of nitrogen, 58 pounds of phosphoric acid and 108 pounds of potash 

 per acre. In 1910, 1911, 1912, 1913 and 1914, we applied 56 pounds of nitrogen, 

 42 pounds of phosphoric acid and 96 pounds of potash. 



Chemical analysesi shows that about 15 pounds of potash and 8 pounds 

 of phosphoric acid are removed in producing a ton of grapes and 1000 pounds 

 of wood per acre, hence a three ton crop would theoretically require approxi- 

 mately 50 pounds of potash and 24 pounds phosphoric acid.l If these figures 

 be correct it will be seen that the applications have been sufficient to supply 

 the needs and still leave an accumulation in the soil. However, the six year 

 average for this section has been over three tons and the wood production 

 considerably greater than a 1000 pounds per acre, so the accumulation is con- 

 siderably less than the figures would indicate. 



Gauging Results. 



During the first two years, 1909 and 1910, records were made of the 

 fruit yields from the different plats, and the general condition of the vines 

 in them, as to their vigor, indicated by the wood growth and the amount and 

 color of the foliage. For the past four years, 1911, 1912, 1913 and 1914, in 

 addition to the above data, weights of the pruned wood, leaf weights (green 

 and dry), amounts of bearing wood put up, and fruit characteristics, as, size 

 of clusters, size of berries, compactness and maturity, were recorded for each 

 plat. 



Table 1. 



Yields in tons per acre from the various plats of the commercial fertilizer 

 vineyard for the years: 



Treatment. 1909 1910 1911 1912 1913 1914 6-yr. av. 



Complete fertilizer, lime 4.48 2.10 5.37 3.46 2.14 4.90 3.7 



Complete fertilizer 4.76 2.21 5.71 4.30 2.83 5.20 4.1 



Nitrogen and phosphorus 5.17 2.14 5.61 4.00 2.25 4.00 3.8 



Nitrogen and potash 4.25 2.55 5.64 4.10 2.85 5.30 4.1 



Phosphorus and potash 3.41 2.00 5.44 4.35 1.78 4.00 3.5 



Check 3.38 2.10 5.32 3.60 1.24 2.90 3.1 



Complete fertilizer, lime 4.69 2.38 5.62 4.80 3.04 5.10 4.2 



Complete fertilizer 4.66 2.07 5.71 4.98 2.72 5.80 4.3 



Nitrogen and phosphorus 4.99 2.04 5.35 4.89 2.61 4.80 4.1 



Nitrogen and potash 4.79 2.26 5.91 4.89 3.07 5.70 4.4 



Phosphorus and potash 4.99 1.87 5.03 4.21 1.97 4.50 3.7 



