CONTENTS. 
PART I. THE WILT DISEASE OF INDIGO IN BIHAR. 
PAGE 
I. Tue Factors Bes os es a 2 
"Soil = si i; a af 2 
Rainfall .. 2's wis as ar 3 
Temperature ar ee ae ae 5 
Soil aeration bs 5 Sie aa ib. 
II. THE CAUSE OF WILT be 6 
Root development in Java indigo. . ar 7 
Observations and experiments on the cause of wilt 9 
The root system of wilted and healthy plants ma ib. 
The occurrence of wilt under monsoon conditions... 12 
The artificial production of wilt a e 14 
Recovery from wilt i Se By 16 
Conclusions Be a ae er Li 
Confirmatory evidence big aie oe ib. 
III. THE DEGENERATION OF JAVA INDIGOIN BIHAR .. a 20 
Pollination and fertilization 4. 3 x ib. 
Natal indigo ac ae Ne aye ib. 
The kinds of indigo now grown in Java as ate 21 
The composition of the Java crop in Bihar .. a ib. 
IV. THE REMEDIES AGAINST WILT i ss Ae 23 
Selection .. ei Hs ne 3 ib. 
Improved drainage .. oe pie 24 
APPENDIX. (By Jatindra Nath Wiklerisn ) 
Variation of carbon dioxide in the soil gas in the different 
plots in the Botanical Area, Pusa, during the period 
January to November 1919 be as ib. 
