520 



THE GRASSES OF TENNESSEE. 



acre each, were selected in May, from the middle of a large 

 clover field. The plants were then about an inch high. 

 One of the plats was manured with 128 Ibs. of gypsum, the 

 second with the same quantity of sulphate of magnesia, and 

 the intervening plat was left without the application of 

 any fertilizer. 



On the plat treated with gypsum the clover plants soon 

 showed a deeper green and a more vigorous growth. The 

 clover on the unmanured plat bloomed four or five days 

 earlier than on the manured. On the manured plats the 

 clover was in full flower on May 24, when it was mown. 

 The results were from each plat 



Cwt. of Clover Hay. 



Without manure 21 . 6 



With gypsum , 30.6 



With sulphate of magnesia 82 . 4 



It was ascertained by a closer examination, that the in- 

 crease in weight obtained from the plats manured with the 

 sulphate did not extend equally to all parts of the plant, 

 but was greatest in the production of stems. There were 

 fewer leaves, fewer flowers, but more stems on the manured 

 than on the unmanured portions. Taking 100 parts of hay 

 the following results were obtained : 



Or putting in another form 



