134 EXPERIMENT STATION RECORD. [Vol. 40 



Raw murk again proved inferior to stable manure as a source of organic 

 matter in connection with chemical fertilizers. Muck composted with liydrated 

 lime at the rate of 10 cords of muck to 1 ton of lime is said to have given quite 

 satisfactory results with early table beets. ' Tests with celery, early tomatoes, 

 and beans again demonstrated that " when the ground is used each year for 

 market-garden crops, and no special provision made for the Introduction of 

 organic matter, si an not continue with the use of only fertilizer chemi- 



cals." 



In rotations without farm manure and Including corn and potatoes, the 

 ond year Of grass after rye and rowen produced .1.6 tons of liay. the yield re- 

 maining practically unchanged with an application of 50 lbs. each of phosphoric 

 acid and potash Instead of i |M » lbs, The third year of grass produced L8 tons 

 of hny without nitrogen and 4.1 and 4.4 tons with 880 and 480 lbs. of nitrate 

 of soda, respectively. It is thought thai maximum yields of mixed timothy 

 and redtop ma] be secured from an annual application of about 850 lbs. of 

 nitrate of soda, ".(H) ll>s. of acid phosphate, and 100 lt>s. of high-grade potash 

 Bait 



<>ats and summer vetch used as a nurse crop produced about the same 

 amount of hay, '■'• i ions, with sulphate of ammonia as with nitrato of soda. 



Pol experl nts are said to have shown thai the Insoluble nitrogen In certain 



brands «>f fertilizers was practically useless, and that the nitrogen of garb 

 tankage was of low gr 



Although the after effect upon n crop of hay of different phosphates applied 

 to corn in the preceding year was DOl sufficient tO produce a maximum crop. 



there was do dif rence observed whether a given amount of money had been 

 invested in raw rock phosphate or In add phosphate, nor whether the same 



amount of phosphoric acid contained In the latter was supplied in bone, Thomas 



slag, or double superphosphabB. 



Mixed timothy and clovers sown in si la 1:0 corn the preceding year yielded 



about 3.5 tons of hay, regardless of whether top-dressed with fertilizer or with 



4 cords of cow manur mtaining either stmw or planer Bhavii 



The addition of 240 lbs. Of common salt per acre bO soil from which potash 

 was withheld to the extent of producing only half I crop of prass resulted in an 



Increase In yield of about one-third. Potatoes grown on soil containing sufficient 



available potash were not benefited by the addition of salt. About as much 

 winter wheat and rowen were obtained where no potash had been added for 7 

 yean as where it bad been applied In different combinations. Bo-Called Ameri- 

 can rock potash (prepared by fusing ground feldspar with calcium chlorid) 



produced B Blightly larger Crop Of potatoes than sulphate of potash. An ap- 

 plication of 2 tons of wood ashes per acre resulted In a very scabby crop of 



potatoes. 



In variety tests with Silage corn, the leading kinds were Eureka with 28 7 

 and learning with 21.5 tons. The best soy bean varieties grown for sii 

 were Wilson with U.S. Virginia with 10.8, and HollybrOOk With 10.2 tons. The 



best varieties of potatoes, each yielding over 800 bu. Of marketable tubers per 

 acre. Included Cuban Multiplier. Pride of Vermont, (odd Coin. Nor and 



Lowell Green Mountain. Tests with early sweet corn are also noted. 



The degree of benefit derive.! from liming different crops Increased in the 

 following order: Hroad-leatVd P.atavian endive, beans, onions, and SUgai 

 and in another comparison barley, carrots, alfalfa, and beets. 



in a mixture of spring vetch and oats nsed as i nurse crop the vetch 



much more depressed than the oats by soil acidity. In a comparison of barley 

 and oats grown to maturity in nutrient solutions the oats matured more slowly 



