共 16 条
[3]
FERTILIZATION AND ITS EFFECT ON RANGE IMPROVEMENT IN NORTHERN GREAT PLAINS
[J].
JOURNAL OF RANGE MANAGEMENT,
1967, 20 (04)
:216-&
[4]
COMMERCIAL FERTILIZERS INFLUENCE CRUDE PROTEIN CONTENT OF 4 MIXED PRAIRIE GRASSES
[J].
JOURNAL OF RANGE MANAGEMENT,
1967, 20 (02)
:96-+
[5]
Jackson M.L., 1958, SOIL CHEMICAL ANALYS, P46
[6]
JACKSON ML, 1958, SOIL CHEMICAL ANALYS, P215
[7]
JACKSON ML, 1958, SOIL CHEM ANAL, P149
[9]
OLSEN SR, 1954, 939 US DEP AGR CIRC