376 



The increased yield from cotton seed is 3.1 bushels per 

 acre, or 13 per cent in excess of the yield from the same 

 amount of nitrogen in the form of cotton seed meal. Cotton 

 seed is believed to pay better on land deficient in vegetable 

 matter than on soil well supplied with this material. And 

 yet even on this piece of weed land, fairly well supplied with 

 organic matter, cotton seed was the most efficient source of 

 nitrogen. 



It does not necessarily follow that cotton seed is the most 

 profitable fertilizer. That depends on the relative prices of 

 cotton seed and meal, or on the quantity of cotton seed meal 

 which the oil mills are willing to give in exchange for a ton 

 of cotton seed. 



The cotton seed meal used in this test cost $20.00 per ton 

 delivered in Auburn, or $1.82 per acre. 



The 426 pounds of crushed cotton seed on one acre also 

 cost $1.82, if we assume a price of $8.56 per ton or 42.8 

 cents per hundred pounds. With both articles at prices 

 named above, one ton of cotton seed would purchase only 

 845 pounds of cotton seed meal, and the results reported 

 above indicate that such an exchange would have been un- 

 profitable to the grower. The oil mills usually give consid- 

 erably more than 845 pounds of cotton seed meal for one 

 ton of seed. 



The exchange value of cotton seed and cotton seed meal 

 will be more fully discussed in a future bulletin from this 

 Department. 



BuENiNG Weeds vs. Plowing Them Under. 



This test was made on two plots in a sandy bottom (the 

 same as that noted in the preceding section) where the land 

 had been given over to weeds after harvesting the oat crop 

 in 1894; so that there was considerable accumulation of 

 litter from two crops of weeds. The dead weeds on both 

 plots stood about five feet high at the time when the traslj 



