134 EXPERIMENT STATION RECORD. 



the use of this form for clovers. The difference in its favor appeared to be greater in 

 proportion as the rainfall was abundant. The yield of cabbage was 33,680 lbs. per 

 acre on the muriate plats and 30,600 lbs. on the sulphate plats. 



The results with garden crops were similar to the average results of previous years. 

 Regarding the effectiveness of nitrate of soda as 100 per cent, dried blood and sul- 

 phate of ammonia stood at 92.7 and 54.8 per cent, respectively, for the early crops 

 (including onions, lettuce, beets, peas, and strawberries), and at 98.7 and 77.5 per 

 cent, respectively, for the late crops (including cabbage, turnips, and celery). A 

 comparison of muriate and sulphate of potash for these crops was in favor of the 

 sulphate for the early and the muriate for the late crops. 



The different phosphates ai)plied on the basis of equal cost ranked in relative value 

 as follows: Phosphatic slag, South Carolina rock, Mona guano, dissolved boneblack, 

 Florida rock jihosphate. Oats were grown in connection with this test in 1901. 



In the test of different phosiahates used on the basis of equal (luantities of "actual " 

 phosphoric acid, continued for several years, the results in 1901 with onions showed 

 them to rank in the following order: Raw bone, phosphatic slag, South Carolina 

 rock, apatite, dissolved bone meal, dissolved boneblack, Tennessee phosphate, 

 acid phosphate, steamed bone meal, Florida i^hosphate. The results confirmed the 

 conclusions of the previous year. 



Different potash salts were compared as fertilizers for wheat and corn, l)ut the 

 results were inconclusive. The authors call attention to the proportionately large 

 yields ol)tained from the use of muriate and nitrate of potash. Good yields were 

 obtained from the use of carbonate and silicate of potash, which is considered as 

 indicating a high grade of availability for these forms. 



The aggregate yields per acre of the varieties of silage corn grown in the test with 

 potash salts were as follows: Eureka, 47,960 lbs.; Boston Market, 38,200 lbs.; Learning 

 Field, 34,520 lbs., and Rural Thoroughbred, 36,150 lbs. The characters of the differ- 

 ent varieties are briefly noted. In actual food value ensilage from Leaming Field 

 was superior. The disadvantages of growing excessively late varieties of ensilage 

 corn are enumerated. 



Soil tests were continued this year with grass and onions. In the tests with grass 

 nitrate of soda alone gave a considerable increase in crop, but much the best yield 

 was obtained where it M'as applied with potash and dissolved l)onel)lack. The 

 results also show a close dependence of clover upon a liberal supply of potash, and 

 establish the possibility of growing profitable hay crops with the use of fertilizers 

 only. It is further concluded that for grass mixtures containing clover a combina- 

 tion of potash and an available phosphate is a profitable application. The results of 

 the tests with onions were exactly similar in kind to those of the previous year, but 

 the yield on the limed soil showed a falling off. The need of lime w-as shown 

 where muriate of ])otash and nitrate of soda were applied and where muriate of 

 potash was used akme. Dissolved boneblack contains a considerable proportion 

 of land plaster, and where this substance was used the need of lime was not so 

 apparent. As in the previous year, the use of dissolved boneblack greatly pro- 

 moted the perfect ripening of the crop, and the use of either this or acid phosphate 

 is recommended for soils on which onions failed to ripen properly. Potash in com- 

 bination with lime gave a much better crop than either of the other fertilizers alone 

 under smiilar conditions. 



Experiments have been in progress since 1890 to illustrate the relative -s-alue of 

 applying manure alone and with potash. Where manure alone was used, 6 cords per 

 acre were applied, and where used in conjunction with potash, the application con- 

 sisted of 4 cords of manure and 160 lbs. of potash per acre. This season these appli- 

 cations produced corn crops practically equal in value, while the hay crops were 

 slightly larger on the manured plats, but the increase, as compared with the manure 

 and potash plat, was produced at a cost greater than its value. The plats on which 



