INSTITUTE, PUSA, FOR 1919-20 



15 



Soiling. The practice of grazing fodder crops on the 

 land has been found to be of great practical value. It now 

 forms part of the rotation designed to determine if it is 

 feasible to maintain the fertility of ordinary rain-watered 

 land under intensive cropping. With irrigated land the 

 matter is comparatively simple, but in rain-watered land 

 the maintenance of fertility by simple practical methods is 

 one of the most urgent of agricultural problems. 



VI Permanent Experiments. 



These were continued in the two fields specially laid out 

 for the purpose. 



(a) The permanent manurial and rotational experi- 

 ments were continued. The results obtained up to the year 

 1918-19 were discussed by a sub-committee held at the time 

 of the last Board of Agriculture. 



The object of this series is to determine the specific 

 effect on soil fertility of the more common organic and 

 chemical manures applied alone and in various combina- 

 tions to a two-vear 4-course rotation. 



Table I showing the treatment and results of outturns 

 for the year 1919-20 is given below : — 



