Table 2. Summary of selected soil properties.
| Soil Series | Olsen P | Bray-1 P | Ca† | Mg | Fe | Al | Sand | Clay | OM | pH |
|---|---|---|---|---|---|---|---|---|---|---|
| mg kg−1 | % | |||||||||
| Amarillo | 3 | 8 | 1538 | 248 | 38 | 491 | 72.2 | 13.5 | 1.6 | 7.6 |
| Barnes | 7 | 16 | 3815 | 526 | 48 | 32 | 22.7 | 22.4 | 5.5 | 8.0 |
| Brazil | 2 | 8 | 451 | 137 | 43 | 702 | 78.2 | 20.1 | 2.8 | 5.3 |
| Clarion | 44 | 75 | 2770 | 593 | 201 | 586 | 36.2 | 38.4 | 4.4 | 6.2 |
| Cordova | 35 | 46 | 4899 | 566 | 82 | 11 | 17.4 | 29.6 | 8.9 | 7.5 |
| Estherville | 16 | 44 | 3084 | 536 | 118 | 259 | 60.1 | 22.7 | 3.9 | 7.0 |
| Fargo | 42 | 87 | 3606 | 1410 | 47 | 17 | 5.2 | 6.7 | 6.8 | 7.7 |
| Formdale | 31 | 51 | 3480 | 816 | 46 | 10 | 29.4 | 21.0 | 6.9 | 7.6 |
| Hubbard | 20 | 82 | 580 | 95 | 95 | 716 | 82.5 | 11.8 | 1.3 | 6.6 |
| Lester | 21 | 25 | 2645 | 425 | 106 | 278 | 40.2 | 32.1 | 5.1 | 6.6 |
| Mt Carroll | 13 | 22 | 2829 | 321 | 83 | 134 | 15.3 | 16.0 | 4.5 | 7.9 |
| Nicollet | 17 | 9 | 2757 | 647 | 120 | 347 | 36.1 | 35.1 | 4.4 | 6.7 |
| Normania | 23 | 44 | 2414 | 608 | 231 | 703 | 37.0 | 30.9 | 4.4 | 5.5 |
| Pella | 37 | 96 | 691 | 166 | 185 | 633 | 26.4 | 22.6 | 5.6 | 7.7 |
| Pullman | 52 | 68 | 2953 | 414 | 40 | 144 | 31.4 | 34.3 | 2.7 | 7.2 |
| Randall | 40 | 74 | 4725 | 569 | 115 | 362 | 30.1 | 40.3 | 3.4 | 7.8 |
| Seaton | 34 | 39 | 2046 | 425 | 149 | 442 | 7.4 | 25.9 | 3.4 | 6.7 |
| Storden | 25 | 42 | 1995 | 349 | 162 | 656 | 43.3 | 30.9 | 4.8 | 5.5 |
| Wheatville | 22 | 24 | 3062 | 925 | 20 | 0 | 19.3 | 11.5 | 4.7 | 8.3 |
| Zimmerman | 15 | 38 | 1561 | 60 | 211 | 368 | 81.0 | 14.3 | 1.9 | 8.0 |
†Ca, Mehlich-3 extractable calcium; Mg, Mehlich-3 extractable magnesium; Fe, Mehlich-3 extractable iron; Al, Mehlich-3 extractable aluminum.