Jan. a. 1920 Relation of Moisture in Substrata to Salt Balance 373 



Table III. — Transphational water loss and amounts of water required for the production 

 of each gram of tops and of roots {water requirement) 



Culture No. 



RiCi 



C2 

 C3 

 C4 

 CS 

 C6 



C7 

 C8 

 R2C1 

 C2 

 C3 

 C4 



Cs 



C6 



C7 

 R3C1 

 C2 

 C3 

 C4 



Cs 



C6 



R4C1 



C2 



C3 

 C4 



Cs 

 R5CI 



C2 



C3 



C4 



R6CI 



C2 



C3 



R7CI 



C2 



R8CI 



Transpiration. 



Series 

 A. 



Cc. 

 66 



192 

 178 

 234 

 259 

 243 

 228 

 238 



143 

 242 

 258 

 249 

 274 

 286 

 241 

 157 

 233 

 286 

 260 

 289 

 244 

 18s 

 242 

 270 

 299 



311 

 213 



324 

 320 

 308 

 262 

 270 

 30s 

 257 

 299 

 236 



Series 

 B. 



Cc. 



184 

 318 

 361 

 382 

 319 



362 



344 

 244 



3S7 

 3SS 

 358 

 386 

 3S4 

 352 

 302 



372 

 400 



34S 

 349 

 316 

 288 

 378 

 415 

 390 

 394 

 318 

 429 

 410 

 428 



344 

 416 

 406 



371 



380 



Series 

 C. 



Cc. 



227 

 289 

 321 



305 

 341 

 390 

 333 

 353 

 300 

 328 



334 

 316 



341 

 330 

 312 

 308 

 320 

 354 

 356 

 349 

 295 

 307 

 353 

 344 



321 

 341 

 417 

 409 



376 

 356 

 392 

 406 

 404 

 390 

 384 



Water requirement. 



Tops. 



Series Series Series 

 A. B. C. 



CcA 

 382 

 442 

 498 

 534 

 519 

 526 

 468 

 491 

 395 

 510 

 482 

 520 

 475 

 554 

 521 

 471 

 518 

 494 

 529 

 570 

 558 

 532 

 460 

 552 

 532 

 590 

 522 



507 

 512 

 526 

 556 

 476 



565 

 570 

 584 

 550 



Cc.a 



573 

 631 

 688 



735 

 621 



673 

 736 

 711 

 668 

 688 

 730 

 753 

 731 

 761 

 802 

 738 

 694 

 742 

 793 

 730 

 754 

 682 



673 

 614 

 658 

 620 

 678 

 514 



573 

 625 



638 

 627 

 669 



617 

 638 

 664 



CcA 



661 



762 



791 

 814 

 840 

 917 

 812 

 862 



815 



754 

 858 

 836 

 820 

 910 

 877 

 756 

 802 

 820 

 807 



954 

 884 



713 

 762 

 718 

 792 

 845 

 739 

 695 

 697 

 787 

 724 

 800 



741 

 746 

 710 

 737 



Roots. 



Series 

 A. 



Cc.a 

 733 

 955 

 977 

 03 s 

 III 

 180 

 071 

 107 

 967 

 042 

 146 

 164 

 067 



153 

 022 

 968 

 183 

 272 

 198 

 051 

 033 

 083 

 120 

 180 

 141 

 102 



297 

 276 

 256 

 158 

 310 

 138 

 250 



452 

 221 



243 



Serie 

 B. 



Cc.a 



I, 051 

 1,288 

 1,362 

 1,322 

 1,271 

 1,318 



1,447 

 I, 428 

 I, 246 

 1,411 

 1,365 

 1,571 

 I, 217 

 1,213 

 I, 205 



1,371 

 I, 562 

 1,418 

 1,326 

 1, 100 



973 



1,270 

 1,312 



1,375 

 1,204 



985 

 1,530 

 1,247 

 1,274 

 1,188 

 1,398 

 1,383 

 I, 206 

 1,378 

 1,475 

 1,372 



Series 

 C. 



Cc.a 



1,463 

 1,530 

 1,630 

 I, 640 



1,705 

 1,920 

 1,640 

 1,575 

 1,795 

 1,632 



1,835 

 1,776 

 1,680 

 1,460 

 1,508 



1,655 

 1,818 

 1,796 

 1,602 

 1,586 

 1,563 

 1,815 

 1,750 

 1,738 

 1, 412 

 1,508 

 1,721 

 1,730 

 1,566 



1,315 

 1,872 

 1,607 

 1,670 



I, 554 

 1,580 

 1,608 



o Quantity of water computed as required for production of i gm. of dry tops or roots. 



In order to bring out the relation between the moisture content of the 

 sand cultures and the amounts of water lost by transpiration the aver- 

 age actual amounts of water lost, as given in the table, were plotted to 

 form the graphs of figure 5. These graphs, as well as those in figures 6 

 and 7 which show the water requirement, were prepared in the same 

 manner as were those representing the yields of tops and of roots (fig. 2, 

 4). The actual average losses from the cultures of series B, which had 

 a medium moisture content, arranged in the descending order of their 

 magnitudes are represented by the full line marked by large dots and 

 sloping uniformly downward to the right. The average losses from the 

 cultures of the other two series were then arranged in the same order 

 and were plotted on the same scale. 



