This section is from the book "The Tinman's Manual And Builder's And Mechanic's Handbook", by Isaac Ridler Butt. Also available from Amazon: The Tinman's Manual And Builder's And Mechanic's Handbook.
Table showing the number of Plants required for one Acre of Land, from one Foot to Twenty-one Feet distance from Plant to Plant.
Feet Distance | No. of Hills. |
1 | 43,560 |
1½ | 19,360 |
2 | 10,890 |
2½ | 6,969 |
3 | 4,840 |
3½ | 3,556 |
Feet Distance | No. of Hills. |
4 | 2,722 |
4½ | 2,151 |
5 | 1,742 |
5½ | 1,440 |
6 | 1,210 |
6½ | 1,031 |
Feet Distance. | No. of Hills. |
7 | 889 |
7½ | 775 |
8 | 680 |
8½ | 602 |
9 | 538 |
9½ | 482 |
Feet Distance. | No. of Hills. |
10 | 436 |
10½ | 361 |
12 | 302 |
14 | 223 |
15 | 193 |
16 | 171 |
Feet Distance | No. of Hills |
17 | 151 |
18 | 135 |
20 | 108 |
21 | 99 |
25 | 69 |
30 | 48 |
 
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