EXPERIMENTAL INVESTIGATIONS INTO THE MINERAL-NUTRITION OF SEVERAL GRASS SPECIES .4. NITROGEN LEVEL

[21] JONES ET, 1934, WELSH J AGR, V10, P223

[22] KNIGHT R., 1960, AUSTRALIAN JOUR AGRIC RES, V11, P457, DOI 10.1071/AR9600457

[23] KRUIJNE A. A., 1960, Jaarboek. Instituut voor biologisch en scheikundig Onderzoek van Landbouwgewassen 1960, P175

[24] LAMPETER W., 1960, Wiss. Z. Karl-Marx-Univ. 1959-60., V9, P611

[25] LOVVORN RL, 1945, J AM SOC AGRON, V37, P570

[26] MAYSER R, 1954, THESIS STUTTGART

[27] Millar C. E, 1955, SOIL FERTILITY

[28] The effect of manuring, grazing and cutting on the yield, botanical and chemical composition of natural hill pastures I Yield and botanical section [J]. JOURNAL OF ECOLOGY, 1940, 28 : 326 - 356

[29] MURPHY WE, 1960, 8TH P INT GRASSL C, P86

[30] NIELSEN K. F., 1963, SOIL SCI, V95, P315, DOI 10.1097/00010694-196305000-00004

[21] JONES ET, 1934, WELSH J AGR, V10, P223

[22] KNIGHT R., 1960, AUSTRALIAN JOUR AGRIC RES, V11, P457, DOI 10.1071/AR9600457

[23] KRUIJNE A. A., 1960, Jaarboek. Instituut voor biologisch en scheikundig Onderzoek van Landbouwgewassen 1960, P175

[24] LAMPETER W., 1960, Wiss. Z. Karl-Marx-Univ. 1959-60., V9, P611

[25] LOVVORN RL, 1945, J AM SOC AGRON, V37, P570

[26] MAYSER R, 1954, THESIS STUTTGART

[27] Millar C. E, 1955, SOIL FERTILITY

[28] The effect of manuring, grazing and cutting on the yield, botanical and chemical composition of natural hill pastures I Yield and botanical section [J]. JOURNAL OF ECOLOGY, 1940, 28 : 326 - 356

[29] MURPHY WE, 1960, 8TH P INT GRASSL C, P86

[30] NIELSEN K. F., 1963, SOIL SCI, V95, P315, DOI 10.1097/00010694-196305000-00004