共 19 条
- [1] Butkevich WS, 1939, CR ACAD SCI URSS, V22, P127
- [2] COOPER HP, 1936, SO CAROLINA AGR EXPT, V49, P109
- [3] ECKSTEIN O, 1937, POTASH DEFICIENCY SY
- [5] HAMNER CHARLES L., 1940, BOT GAZ, V101, P637, DOI 10.1086/334901
- [6] HARMER PAUL M., 1941, JOUR AMER SOC AGRON, V33, P952
- [8] HARTWELL BL, 1908, RHODE ISLAND STA RPT, P243
- [9] HARTWELL BL, 1913, RHODE ISLAND AGR EXP, V153, P89