52 SCIENTIFIC REPORTS OF THE AGRICULTURAL RESEARCH 



been dug out and then re-filled should be included in the 

 series. Where both root development and yield of seed 

 have to be determined, the plots should be in duplicate as 

 the removal of specimens for root examination introduces 

 a new aeration factor. 



The differences in growth and root development obtained 

 by this modified form of pot culture are very striking and 

 the new method has yielded results of considerable interest 

 both at Pusa and also at Quetta. Measurements of the 

 length of growth, of the total weight of crop and of the 

 seed can rapidly be obtained while very useful results as 

 regards the conditions on which root development depends 

 have been secured. ♦ 



III. Investigations in the Native States. 



1. Central India States. 



A beginning has been made in extending the investiga- 

 tions started at Pusa to some of the Native States. At 

 the request of Mr. B. Coventry, C.I.E., Agricultural 

 Adviser in Central India, and with the concurrence of the 

 Durbars concerned, variety trials with wheat and gram 

 were carried out on three of the farms in Central India 

 during the past rabi season. Results of considerable value 

 were obtained and the trials are being continued and 

 extended. 



The soils of Central India are by no means uniform and 

 the conditions, even on a black soil tract like the Malwa 

 plateau, vary considerably. On the well-irrigated, garden 

 lands of Malwa, on which till recently opium poppy was 

 grown, it has been found that Pusa 4 does exceedingly well 

 and produces heavy crops under well irrigation. 

 Mr. Coventry reports on these trials as follows (Letter 

 dated Apriri3th, 1918): — 



" Pusa 4 has again been a great success this year on 

 the irrigated area. Dhar, for example, has got 25 maunds 

 per acre, a record result for Central India. I have 

 therefore very strongly urged the Durbars to take up the 

 distribution of this wheat on as large a scale as possible. 



