138 



STORRS AGRICULTURAL EXPERIMENT STATION. 



to the average of the yields on all the plots supplied with ni- 

 trogen in addition to the mineral fertilizers. The results thi.^ 

 year, as in the past, point to the small value of nitrogen for 

 this crop. In nearly all cases during an experience of twelve 

 years in growing cow peas there has been but very little in- 

 crease from the use of nitrogen when the mineral fertilizers 

 were liberally supplied. The plowing under of cow peas for 

 increasing the nitrogen in the soil is one very important use 

 for the crop, but it should be remembered that on worn out 

 soils liberal quantities of phosphates and potash should be used 

 as fertilizer if a fair crop is to be obtained for this purpose. 



Table 70. 



SPECIAL NITROGEN EXPERIMENTS ON COW PEA FODDER. 



Weight and cost of fertilizers per acre, total crop, and increase of 

 crop over that of nothing plots. 



EXPERIMENTS WITH SOY BEANS. 



The two series of sections designated as B and E in the dia- 

 gram on page 124 were planted with soy beans. The results 

 on the two series of sections have been combined, and are 



