EXPERIMEXTS IX THE DrOWTH OF ClOV'ER. 361 



duced substantial increases in all cases, but the application of 20 tons 

 per acre was not so effective as 10 tons, a condition that will hardly 

 hold good in the field. 



Another series of pots was started on this type of soil, but from another 

 field that is practically abandoned. It was intended to get some data 

 on the relative amount of lime required by mammoth, red, alsike, and 

 white clovers. These pots received the lime treatment only and the 

 soil proved to be too badly exhausted to grow a plant without the addition 

 of some plant-food, and the results were too meager to allow of any 

 conclusions being drawn. 



Another Method of Ascertaining the Fertilizer Requirements of the Volusia 



Silt Loam^ 



The following work is not entirely in keeping with the study of the 

 clovers on the soils in question but is added to give some additional 

 light on the fertilizer requirements of this particular soil, on which the 

 greater part of the work has been done. The soil came from a property 

 near the Pinckney farm. The method here employed is the small 

 wire-basket test, in which only about one pound of soil is used, and the 

 plants are grown for a short time instead of to maturity as was the case 

 in the pot work. In this experiment the crop grown was wheat in all 

 cases except three, but the results are largely in accord with those 

 obtained with the clover, especially with regard to lime, manure, acid 

 phosphate and nitrate of soda. 



Table Showing the Effects of Manure and Fertilizers on Wheat 

 AND Clover Grown on Volusia Silt Loam, by the Wire- 

 Basket Method 



Treatment (Acre basis) Comparative 



Yields. 



Nothing 100 



320 lbs. Phosphate of Lime 98 



80 lbs. Muriate of Potash 115 



1 60 lbs. Nitrate of Soda 134 



320 lbs. Phosphate of Lime, 120 lbs. Nitrate of Soda 121 



320 lbs. Phosphate of Lime, 80 lbs. Muriate of Potash 115 



160 lbs. Nitrate of Soda, 80 lbs. Muriate of Potash 153 



Complete Fertilizer: 320 lbs. Phosphate of Lime, 80 lbs. Muriate of Potash, 



160 lbs. Nitrate of Soda 135 



320 lbs. Nitrate of Soda, 80 lbs. Muriate of Potash, 640 lbs. Phosphate of Lime 156 



320 lbs. Nitrate of Soda, 80 lbs. Muriate of Potash, 320 lbs. Phosphate of Lime 160 



Cut clover i ton 115 



Manure 10 tons 148 



Manure 20 tons 181 



*By Messrs. Breaseale, Brown & Reid of the U. S. Dept. of Agr. 



