1889.] PUBLIC DOCUMENT — No. 33. 103 



work carried on during the past season, as well as the 

 conditions of the crop at different stages of growth, upon 

 different plats into which field "A" has been subdivided, 

 will enable all parties interested in the experiment to draw 

 their own conclusions reo;ardinof its teachings. 



The entire field was ploughed twice, as in previous years, — 

 in autumn, a short time after harvesting the crop, and early 

 in the succeeding spring. The fertilizing materials, single 

 or compound, wherever used, were applied broadcast, and 

 slightly harrowed under some time before planting. 



Hat 1. Received 50 pounds of muriate of potash (25 pounds of 

 potassium oxide) . 

 Plat 2. 50 pounds of nitrate of soda (7-8 pounds of nitrogen) . 

 Plat 3. 100 pounds of dissolved bone-black (16-17 poimds of soluble 

 phosphoric acid). 

 Plat 4. Nothing. 



97 pounds of magnesia sulphate. 



Nothing. 



50 pounds of muriate of potash (25 pounds of potassium 



50 pounds of sulphate of ammonia (10 pounds of nitrogen). 

 50 pounds of muriate of potash (25 pounds of potassium 



97 pounds of sulphate of potash and magnesia (25 pounds 

 of potassium oxide) ; 100 pounds of dissolved bone-black (16-17 pounds 

 of soluble phosphoric acid) . 



The corn (Clark) was planted in drills. May 29. The 

 rows were three feet and three inches apart, and the kernels 

 were dropped in the rows from twelve to fourteen inches 

 apart, with six to eight seeds in a place. The entire field 

 was subsequently kept clean from weeds by a frequent use 

 of the cultivator or the hoe, as circumstances advised. 



The young plants appeared above ground quite uniformly, 

 June 5. They soon showed, however, marked differences 

 in regard to the rate of growth upon different plats, and 

 presented, as the season advanced, more or less striking 

 diflerences in their general appearance. 



