| 000 | 00448 a2200145 4500 | ||
|---|---|---|---|
| 080 |
_a631.417.2(063) _bS 989 P |
||
| 245 | 1 |
_aHumic substances in soil substances in soil subsctances in soil and crop sciences _bSelected readings : _cedited by P. MacCarthy, et. al. |
|
| 260 |
_aMadison _bAmerican Society of Agronomy _c1990 |
||
| 650 | _aHumus | ||
| 650 | _aSoil | ||
| 650 | _aSoils-Humic Acid | ||
| 100 |
_a _d |
||
| 300 | _a281 p. | ||
| 901 | _a201251 | ||
| 999 |
_c80625 _d80625 |
||