Kew York Agkioultural Experiment Station. 343 



tionally good record for the sulphate of amDionia when used 



without manure and it was not in accord with its record either 



with the preceding or the following crop except where it was 



used in combination with lime. 



Both kinds of lettuce did better on the clay loam than on the 



sandy loam. This is very noticeable with the check crops. The 



check crop on the clay loam exceeded that on the sandy loam in 



the ratio of 7 to 1. 



SEASON OF 1900-01. 



The experiments in 1900-01 followed the lines of the preceding 

 year's work except that one box of the three included in each 

 soil treatment was given one ounce of air-slaked lime when the 

 soil was mixed. Occasional tests of the soil made previously had 

 failed to discover any acidity, but it was desirable to learn 

 whether or not the repeated application of the commercial fer- 

 tilizers had brought about unfavorable conditions which the lime 

 would correct. The use of the lime was, almost without excep- 

 tion, followed by more or less unfavorable results. In some 

 cases the yield was but slightly decreased, in most cases it was 

 noticeably decreased and in a few cases the yield was not even 

 half that obtained on the unlimed soils. Where nitrate of soda 

 was applied without manure to sandy loam and where sulphate 

 of ammonia was used without manure on the clay loam, the 

 limed soils gave somewhat better yields than those not limed. 



The seed was planted in the usual manner Sept. 28. The head 

 lettuce came through all right but for some reason not under 

 stood the loose lettuce did not. It was replanted Oct. 9. This 

 time it grew all right, but of course it remained more backward 

 than the head lettuce. The head lettuce grew rapidly on the 

 soils which received manure, being markedly superior from the 

 start to that on the soils which were not manured. Ou the whole 

 the highest yield of head lettuce came from the use of 10 per ct. 

 manure, but that from 5 per ct. was nearly as large. With 33^ 

 per ct. manure and no commercial fertilizers the yield in each 

 case fell below the average of the boxes having 5 per ct. manure 

 combined with commercial fertilizers, as also, usually, did the 



