46 REPORT OF THE AGRICULTURAL RESEARCH 



season and are also being tried in other parts of India. 

 The results indicate that selection methods can be applied 

 to gram with good prospects of success. As the flowers 

 are self-fertilized in Bihar, it is likely that any improve- 

 ment can readily be maintained. 



Fibres. 



The work with fibre plants has been continued, the 

 crops studied being patwa (Hibiscus cannabinus), rozelle 

 (Hibiscus Sabdoriffa), and san (Crotalaria juncea). 



It was found that one of the types of H. cannabinus 

 grown from the seed of unprotected flowers could be freed 

 from all hybrids in the seedling and early vegetative stages 

 and thus could be kept pure by simple rogueing. It is 

 possible that similar methods might be adopted in the case 

 of cotton grown for seed distribution purposes. In the 

 case of san progress was made in isolating the various 

 varieties of this crop and a beginning was made in the 

 study of the methods of pollination in this species. 



In rozelle a considerable amount of work was done on 

 the inheritance of characters in this crop and in the study 

 of the second generation of the hybrids. The varieties of 

 Indian rozelle are well adapted for the study by students 

 of simple Mendelian phenomena and it w^as partly on this 

 account that this work was undertaken. 



Pollination. 



Progress was made during the year in the study of the 

 methods of pollination in the various crops of India and 

 particular attention was devoted to some of the oil-seed 

 crops. As soon as sufficient material has been collected 

 these results will be incorporated in a paper. 



Part IV. 



The Tirhut Agricultural Exhibition. 



The Tirhut AOTicultural Exhibition was held in the 

 botanical area at Pusa on January 18th, 19th and 20th, 



