GMELINA 



71 



seedlings may be entirely killed down, though their power of recovery from 

 the base is good. Seedlings are somewhat light-demanding, their development 

 being poor under shade which is at all heavy. In the germinating stages 

 crickets are often destructive, while in the saphng stage much damage is done 

 by a boring insect which tunnels down the shoots and frequently kills the 

 leading ones ; the attack may be recognized by holes in the side of the shoot 

 affected. 



The following measurements in experimental plots at Dehra Dun give 

 some indication of the rate of growth of young plants under different con- 

 ditions : 



Gmelina arborea : development of seedlings, under different conditions, 



Dehra Dun. 



Height at end of season, and other particulars. 



2nd season. 3rd season, 



i ft. in. (only one 10 ft. in. 

 seedling germinated) 



Condition under which groRvn 

 (in sunny locality in each 

 case : shade experiments 

 failed). 1st season. 



(1) Natural conditions (fruits ft. 7 J in. 

 scattered on bare ground, 

 uncovered) 



(2) Natural conditions (fruits Maximum ft. 11 in. 

 scattered on bare ground, 



uncovered) 



(3) Natural conditions (fruits Maximum ft. 10^ in. 

 scattered on grassy ground) 



(4) Nursery plants Maximum 1 ft. 3 in. 



(5) Transplants of 1st season, Maximum 1 ft. 4| in. Maximum 3 ft. 9 in. ft. 9 in,-5 ft. 3 in. 

 entire roots and stem (un- 



weeded after transplanting) 



2 ft. 8 in.-9 ft. 6 in. 

 2 ft. 5 in.-3 ft. 1 in. 



4th season. 



(6) Transplants of 1st season, Maximum 1 ft. 8 in. 11 in.-5 ft. 3 in. 

 entire roots and stem (un- 

 weeded after transplanting) 



(7) Transplants of 2nd season, .. 

 pruned stem and root 



(8) Broadcast sowings, irri- Maximum 2 ft. 10 in. 2 ft. 8 in.-lO ft. in. 

 gated, weeded (vigorous) (vigorous, 33 sur- 

 vivors) 



(9) Broadcast sowings, irri- Maximum ft. 5| in. 1 ft. 1 in. 



gated, unweeded (weakly) (only one sun'ivor) 



(10) Broadcast sowings, im- Maximum ft. 10 in. 1 ft. 11 in.-5 ft. 4 in. 

 irrigated, weeded 



(11) Broadcast sowings, un- Maximum ft. 9 in. 1 ft. 6 in.-4 ft. in. 

 irrigated, unweeded 



(12) Line sowmgs, irrigated. Maximum 3 ft. 3| in. 5 ft. 10 in.-8 ft. 9 in. 14 ft. in.-17 ft. 10 \n. 

 weeded, thinned 



(13) Line sowings, inigated, Maximum 4 ft. 4 in. 3 ft. in.-12 ft. 2 in. 8 ft. in.-l7 ft. 8 in. 

 weeded, unthinned (stems less vigorous 



than in thinned lines) 



(14) Lme sowings, irrigated, Maximum 3 ft. in. 4 ft. 7 iil.-lO ft. 3 in. 8 ft. in.-16 ft. 5 in. 

 unweeded, unthinned (stems thin and lanky) 



(15) Line sowings, unirri- Maximum 4 ft. 6 in. Maximum 10 ft. 6 in. 

 gated, weeded, thinned. 



(16) Line sowings, unirri- Maximum 3 ft. 3 in. Maximum 7 ft. in. 

 gated, weeded, unthinned 



(17) Line sowings, unirri- Maximum 3 ft. 8 in. ft. 10 in.-7 ft. in. 

 gated, unweeded, unthinned 



(18) Line sowings, weeded, in ft. 2 in.-O ft. 10 in. Maximum 6 ft. 4 in. 

 combination with field 



crops (suppressed by crops 

 in first season) 



Some of these measurements indicate the value of weeding. 



F f 2 



13 ft.-14 ft 

 (maximum 

 girth 9 in 

 at 3i ft. fron 

 ground) 



