INSTITUTE, PUSA, FOR 1918-19 

 Table IV. 



59 



The effect of altered soil texture on growth and seed formation in 



Java indigo. 



An inspection of the table shows that while the substitu- 

 tion of ten to thirty per cent, of the soil by potsherds multi- 

 plies the yield of seed three times, the effect of leafmould 

 with or without potsherds was much greater. Thus the 

 substitution of forty per cent, of the volume of the soil by 

 leafmould (30 per cent.) and potsherds (10 per cent.) 

 increased the production of seed twenty-one times. 

 Another interesting feature was the cessation of growth in 

 length in all cases at the beginning of December quite 

 independently of the soil conditions or of the size of the 

 plants. This always occurs under field conditions. Tor 

 large yields of seed, large plants must be produced by the 

 beginning of December and practically all the seeds must 

 have set by this time. Bearing in mind the small amount 

 of growth which is possible up to the beginning of October, 

 it is evident how rapid the development must be during 

 •October and November if crops of seed over ten maunds to 

 the acre are contemplated. 



E 



