Rundles: Studies in Rice 
X, C. 6 
369 
plants set in a place need not greatly vary when the seedlings 
are carefully removed from a seed bed not thickly planted. 
If the farmer considers a planting distance of 20 by 20 centi- 
meters with four plants in a place as most desirable, then with 
the aid of the table it is easy to calculate the area required for 
a definite number of seedlings. One million six hundred eighty 
thousand, the number of seedlings produced from a cavan of 
seed of the average size, would transplant an area of 16,800 
square meters with 1,000,000 seedlings per hectare. 
Table V . — Showing average plant productions. 
Plants per 
hectar. 
Yield per plant when the yield in cavanes per 
hectare is — 
10. 
20. 
30. 
40. 
50. 
60. 
9 . 
9 ■ 
9 • 
9 • 
9 - 
9 • 
4, 000, 000 
0. 10 
0.21 
0. 32 
0. 43 
0. 53 
0. 64 
2, 000, 000 
0.21 
0. 43 
0. 64 
0. 86 
1.07 
1. 29 
1,000, 000 
0.43 
0. 86 
1. 29 
1.72 
2. 15 
2. 58 
800, 000 
0.53 
1.07 
1. 61 
2. 15 
2.68 
3. 22 
600, 000 
0.71 
1. 43 
2. 14 
2. 86 
3.58 
4. 30 
The average plant production varies with the number of 
plants per hectare. With 1,000,000 plants and a yield of 40 
cavanes the average plant production is 1.72 grams. This is 
a low average plant yield, being equivalent to 70 grains of ordi- 
nary size — an amount which may easily be contained in a tea- 
spoon. 
In Laguna Province I found farmers using a transplanting 
distance of 22.5 by 22.5 centimeters with an average of 22 seed- 
lings per place or about 4,000,000 plants per hectare. 
Table VI . — Showing actual average yields of selected plants of six varieties 
of rice grown under ordinary conditions. 
Variety. 
Average 
weight 
of seed. 
Average 
mature 
seeds per 
panicle. 
Average 
panicles 
per stool. 
Average 
seeds per 
6tool. 
9 . 
Laguilan . 
17.8 
203 
4.6 
938 
Caribud .. . .. . 
12.9 
108 
3.8 
419 
Caluctot 
16.8 
85 
8.0 
680 
Inintivo _ 
18.4 
118 
6.0 
708 
Calibu 
12.7 
80 
7.3 
627 
Mindanao . 
27. 09 
154 
6.2 
954 
From Table VI it is evident that the best yields for individual 
plants vary for different varieties. The yields recorded are 
