LOSSES OF MOISTURE AND PLANT FOOD BY PERCOLATION. 43 



This is 53.7 per cent, of the 456 milligrams nitrogen applied in the 

 manure each year. According to this, an application of 9 tons manure 

 per acre annually would raise the corn possibility (so far as nitrogen is 

 concerned) 20 bushels per acre. 



TABLE NO. 16. 



Nitrogen Percolated as Nitrates in Milligrams Per Pot. 



No 

 addition. 



Manure 

 October 15. 



Manure 

 March 15. 



Norfolk sand, 1911 516.0 



Norfolk sand, 1912. . 131.8 



Norfolk sand, 1913 9.3 



Average 219.0 



Orangeburg fine sandy loam, 1911 116.5 



Orangeburg fine sandy loam, 1912 395.2 



Orangeburg fine sandy loam, 1913 455.2 



Average 671 . 8 



Miller fine sandy loam, 1911 1489.0 



Miller fine sandy loam, 1912 423.2 



Miller fine sandy loam, 1913 193.7 



Average 702.0 



Lufkin sandy loam, 1911.. 716.0 



Lufkin sandy loam, 1912 448.5 



Lufkin sandy loam, 1913 697.2 



Average 620.6 



Average for group 553 . 4 



Houston loam, 1911. . 1155.0 



Houston loam, 1912 576.9 



Houston loam, 1913 211.9 



Average 647 . 9 



Houston black clay, 1911 , 2157.0 



Houston black clay, 1912 812.1 



Houston black clay, 1913 646.9 



Average 1205 . 3 



Yazoo clay, 1911 347 &'9 



Yazoo clay, 1912 J?tn'l 



Yazoo clay, 1913 1152.3 



Average 2003.6 



Crawford clay, 1911 3 2oo'? 



Crawford clay, 1912 899-3 



Crawford clay, 1913 1060 - 2 



Average itao'i 



Average for group J -"> 5 ^ 



1009.0 

 510.9 

 209 . 3 



603.4 



168.5 

 536.0 

 766.8 



995.9 



1869.0 

 456.6 

 220.3 



848.6 



1253.0 

 498.2 

 354.4 



701.9 

 787.5 



1134.0 

 412.4 

 509.5 



685.3 



1090.0 

 578.9 

 960.9 



876.6 



435.0 



33.3 



159.3 



209.2 



1199.0 



519.5 



58.5 



592.4 

 590.9 



1459.0 

 629.1 

 543.6 



877.2 



2259.0 



1007.8 



830.5 



1365.8 



3924.0 

 1355.7 

 1489.9 



2256.5 



3595.0 

 1295.0 

 1276.0 



2055.3 

 1638.7 



1161.0 

 528.5 

 349.5 



679.7 



1605.0 

 756.4 

 316.3 



892.6 



2990.0 

 898.8 

 803.5 



1564.1 



3315.0 

 1121.9 

 1383.7 



1940.2 

 1269.2 



