b ere) BOTANICAL GAZETTE [FEBRUARY 
grow alfalfa 40 years or longer, provided, of course, none of these 
elements is added in any way and none removed except in the crops. 
Sample 9A, which has the highest sulphur content, has sulphur 
TABLE III 
POUNDS PER ACRE OF SULPHUR AND PHOSPHORUS AND NUMBER OF YEARS’ SUPPLY 
VARIOUS CROPS IF MAXIMUM CROPS ARE REMOV 
SULPHUR PHOSPHORUS 
Sor uo. g 4 No. of years’ supply for g 3 No. of years’ supply for 
25 3 Se. : 
3**| Corn | Wheat] T°" | Clover| Alfalfal 3 * | Corn | Wheat] 7/71?" | Clover| Alfalfa 
DAs 310°] 40 | Ga | “28 24 oS 1 yoo 4e4 Go. Bo |. 36). 29 
2A, OFF F285 OL hh Be ef ek kOsOl OT 6: (41s fe 521 20 
BA aa 366 924.530 | 26 Gt) 634° 8351.20 |. 29 
ARs Foe Vg t tA] Os fb RO AOL. cot ee hea yo fesse ope ee 
ne , eapare 638 | S82] 125 | 561. 49 | 14 | 1098)-.60 |) 86} 114] 5% | 20 
SASL, 464 | 6 gt 41 36 10 | 1570) os 1 151.1 175 79 | 44 
Vn eee 665 [36 |-141 1. G0}. §1 i411) 354210 OF 1 120 F 17% Yi i oe 
SAL 662°] 92: } 110 | Sof) 4g | rR F reOar GET O71 129°) 58} 33 
GA. 5.05 1810 | 232 | 355 | 1590 | 139 | 39 | 1878] 110 | 156 | 209 | 94] 52 
19 Res 702 38 | 62] 54] 15 | 1488) 88| 124 | 165 | 74] 41 
Ri Ras. 490 | 63:1 061 43.}538 | 1&4 BSQ0] 94 1 133 | 177 | 80 
02.2758: 44 67 30 26 7 | 2108] 124 | 176 | 234 | 105 59 
oe eae oe S301 42 1 65 29 | 25 b Eas0l FA b 10s | 139 7. 08 5 
14. 230) 30} 4G | a 18 6 -OBOP 65 1 82.1 400] Ag] 27 
$6 hives 310 |. 40°) 6F 28 24 FL reaa OR oon | E20 bese Se 
0s eS 406 | 60 | or | 241] gO} 16 | 1908] 60.1). -o4-1.225)° GO 1) 3% 
iy Sa 366 1° 47 72 32 28 8 | 984) 58: | 82 | t090 | 40 27 
= Sonne eee 410 | i: AO) OF 28 24 7 | 1156) 68] 96 | 128 S| 32 
toe 516 | 66] 101 | 45 | 40] I1 | 3794] 223 | 316 | 422 | 190 | 105 
Ws £04100). OL f 40: |< 36 ¥O | 1505) o4 | 133.1 177 |. 80 | 44 
cn Tae 262 | 44) Si a3:}- 36 6 | 3272) 102 | 2751 364°) 164.) Ot 
Cs ee 44 | 31 48 22 19 5 | 2596] 153 | 216 | 288 | 130 72 
ee eee 412 534. 88 £ 426). 22 O1-1536) 90 |. 428 | 79% 77-\ 43 
FE 528 | 68] 104 | 46] 4 Il | 2754) 102.) 230 | 406 | 430.) 77 
gh os,. 318 | 4%.) 64 {| 28 |. 24 7 | 1954] 115 | 163 | 216 8| 54 
20. ce. Aj? | GY) gs.) 4t 36 10 | 3530| 208 | 294 | 392 | 177 | 98 
ere $06) 30/1 fo 1 27 | 24% 7 | 2740] 161 | 228 | 304 | 137 | 76 
2B srs 490 | 6 42126 11 | 49701 997 | 303°) $23 | 230 |: 532 
96.0 Gs ajo, G61 o27 421 36}. 1013 76 | 250 | 333 | 150 | 83 
SO as, 332.) 42 | 63 ae 25 7 | 3558] 209 | 296 | 3905 | 178 | 99 
he ce 06} 65 44 | 39] 11 | 2014] 118 | 168 | 224] ror | 56 
Ce pipe eae 5 64 | 98 38 11 | 3454| 203 | 288 | 384 | 173 | 96 
Bs) Can si 326 |. 42 64 | 20 25 9 1 2619] 154 | 218 | 290 | 131 13 
MA oe eaees 626 | 80| 122] 55 | 48| 14 | 6824] gor | 568 | 757 | 341 | 189 
enough for 39 years of alfalfa and phosphorus enough for 52 years 
of alfalfa. Only one other soil, no. 2 A, had enough sulphur for 20 
years of alfalfa, while three soils, nos. 19, 28, and 34, have enough 
