Nitrogen supply for spruce on infertile sites : an ecological problem /

Soil and fertilizer nitrogen : review study with particular reference to plant nutrition and environmental protection /
Published: (1984)

Nitrogen in organic wastes applied to soils /
Published: (1989)

Bibliography of literature on potash as a plant nutrient.
Published: (1940)

Field measurements of ammonia volatilization from surface applications of nitrogen fertilizers to a calcareous soil /
by: Hargrove, W. L. (William Leonard)
Published: (1977)

Plant condition and plant growth. : Planting experiments with spruce (Picea abies (L.) Karst.) on Calluna heath land. Plantkondition och tillvaxt. Planteringsforsok med gran pa ljunghedar.
by: Björkman, Erik, 1912-
Published: (1970)

Nitrogen in agricultural soils /
Published: (1982)

Nitrogen in agricultural soils /
Published: (1982)

Grassland nitrogen /
by: Whitehead, D. C. (David Charles)
Published: (1995)

Alaska's spruce /
by: Clapp, Verner Warren, 1932-
Published: (1979)

Rooting Sitka spruce from southeast Alaska /
by: Copes, Donald L.
Published: (1987)

Lumber yield from sitka spruce in southeastern Alaska /
Published: (1972)

Genetics of Sitka spruce /
by: Roche, L. R.
Published: (1975)

Effects of tillage and nitrogen fertilization on nitrogen losses from soils used for corn production /
Published: (1990)

Farming, fertilizers and the nitrate problem /
by: Addiscott, T, M.
Published: (1991)

Azot v pochvoobrazovanii i zemledelii /
Published: (1974)

The soil nitrogen index and its calibration with crop performance to improve fertilizer efficiency on arable soils /
by: Robinson, J. B. D.
Published: (1975)

Growth and yield of sitka spruce and western hemlock at Cascade Head Experimental Forest, Oregon /
Published: (1984)

Response of sitka spruce and western hemlock to commercial thinning /
by: Graham, Joseph N.
Published: (1985)

Nitrogen economy of flooded rice soils : proceedings of a symposium on the nitrogen economy of flooded rice soils, Washington, DC, 1983 /
Published: (1986)

Nitrogen fluxes in intensive grassland systems /
Published: (1986)

Nitrogen fertilizers /
by: Korenʹkov, D. A. (Dmitriĭ Aleksandrovich)
Published: (1983)

Nitrogen in Soils of China /
by: Zhu, Zhao-liang
Published: (1997)

Sitka spruce : an American wood.
by: Harris, A. S.
Published: (1984)

The effect of organic soil amendments and nitrogen rate on field establishment of rabbiteye blueberries (Vaccinium ashei Reade.) /
by: Wellborn, Elizabeth Carol, 1957-
Published: (1982)

Ecology and management of Sitka spruce, emphasizing its natural range in British Columbia /
Published: (1997)

Spruce needle rust /
by: Hennon, Paul E.
Published: (1987)

Forage fertilization on Texas Blackland and Grand Prairie soils /
by: Welch, C. D., et al.
Published: (1977)

Nitrogen efficiency in agricultural soils : a Seminar on Nitrogen Efficiency in Agricultural Soils and the Efficient Use of Fertilizer Nitrogen, held in Edinburgh, 16-18 September 1987, as part of the EC Programme for the Coordination of Agricultural Research /
Published: (1988)

Progress in nitrogen cycling studies : proceedings of the 8th Nitrogen Workshop, held at the University of Ghent, 5-8 September 1994 /
Published: (1997)

Nitrogen management in farming systems in humid and subhumid tropics /
Published: (1985)

Progress in Nitrogen Cycling Studies : Proceedings of the 8th Nitrogen Workshop held at the University of Ghent, 5-8 September, 1994 /
by: Cleemput, O.
Published: (1996)

Nitrogen in organic wastes applied to soils /
Published: (1989)

Sulfur and phosphorus responses of Batatais grass (Paspalum notatum) /
by: McClung, A. C., et al.
Published: (1959)

Chemical properties and moisture extraction in rangeland soils and influenced by nitrogen fertilization /
Published: (1961)

Nitro-culture and inoculation /
by: Ball, O. M. (Oscar Melville), 1868-1942
Published: (1906)

Estimation of ammonia volatilization from surface-applied urea as indicated by bermudagrass N-use efficiency /
by: Drwal, John Matthew, 1961-
Published: (1986)