12-YEARS OF CONTINUOUS CORN FERTILIZATION WITH AMMONIUM NITRATE OR UREA NITROGEN

[1] ARNEMAN HF, 1968, 83 MINN AGR EXP STA

[2] BROADBENT F. E., 1958, SOIL SCI SOC AMER PROC, V22, P303

[3] CONRAD JP, 1940, AGRON J, V32, P48

[4] ERNST J. W., 1960, SOIL SCI SOC AMER PROC, V24, P87

[5] Jackson ML, 1958, SOIL CHEMICAL ANALYS

[6] METHODS OF MAKING MECHANICAL ANALYSES OF SOILS [J]. SOIL SCIENCE, 1949, 68 (01) : 15 - 24

[7] VOLATILIZATION OF AMMONIA FROM SURFACE-FERTILIZED SOILS [J]. SOIL SCIENCE, 1951, 71 (01) : 25 - 34

[8] MEYER R. D., 1961, AGRON JOUR, V53, P241

[9] OLSON RA, 1967, SB479 U NEBR AGR EXP

[10] SCHWARTZBECK R. A., 1961, SOIL SCI SOC AMER PROC, V25, P186

[1] ARNEMAN HF, 1968, 83 MINN AGR EXP STA

[2] BROADBENT F. E., 1958, SOIL SCI SOC AMER PROC, V22, P303

[3] CONRAD JP, 1940, AGRON J, V32, P48

[4] ERNST J. W., 1960, SOIL SCI SOC AMER PROC, V24, P87

[5] Jackson ML, 1958, SOIL CHEMICAL ANALYS

[6] METHODS OF MAKING MECHANICAL ANALYSES OF SOILS [J]. SOIL SCIENCE, 1949, 68 (01) : 15 - 24

[7] VOLATILIZATION OF AMMONIA FROM SURFACE-FERTILIZED SOILS [J]. SOIL SCIENCE, 1951, 71 (01) : 25 - 34

[8] MEYER R. D., 1961, AGRON JOUR, V53, P241

[9] OLSON RA, 1967, SB479 U NEBR AGR EXP

[10] SCHWARTZBECK R. A., 1961, SOIL SCI SOC AMER PROC, V25, P186