52 SCIENTIFIC REPORTS OF THE AGRICULTURAL RESEARCH 



burst, and that this twisting helps to move round the burst 

 anthers and thus bring the pollen-covered surface of the 

 anthers into contact with the stigma. Cross-fertilization is 

 rare, but by no means unknown, and necessitates the bagging 

 of seed in all exact work. 



From the results of this work it appears the Central 

 Indian types, having a deep root system, do not form good 

 seed in Bihar. Local types, having a shallow root system, 

 thrive well and form good seed, but the seed is small and 

 inferior. To improve the seed of Bihar linseed, it will 

 probably be necessary to produce a new race by crossing 

 between Bihar and Central India types. A type possessing 

 a root system like the Bihar varieties and seed qualities like 

 the Central India types is desirable. 



V. Tobacco, Grams, Hibiscus., etc. 



. Tobacco. Work on tobacco was restricted to the grow- 

 ing of Mrs. Howard's selected types, for the maintenance 

 of pure seed. Of these, 51 were Nicotiana tabacum and 20 

 Nicotiana rustica. 



Besides these, over an acre of the selected type, No. 28, 

 was grown for seed multiplication, in order to'obtain a large 

 supply to meet the ever increasing demand for this type. 

 From 1-2 acres, 15 maunds 5 seers of seed were obtained, 

 sufficient to grow approximately 95,000 acres. In previous- 

 years it has been found impossible to grow sufficient seed of 

 this type, owing to the difficulties of preventing cross-pol- 

 lination, as other types were being grown in the vicinity. 

 This year it was possible to allow the flowers to pollinate 

 freely and set seed right throughout the season, so that a 

 heavy seed crop was obtained. 



During the period under review approximately 2 maunds 

 of seed, sufficient for about 12,000 acres, of this type have 

 been sent out, the largest quantities to the Indian Leaf 

 Tobacco Development Company, Dalsing Serai, and to 

 Burma. 



Grams. During the period under review, the following; 

 types of selected Pusa grams were sown for observation and 



