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Soils -- Nitrogen content -- Colorado

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• Soils -- Nitrogen content
• Soils -- Colorado

• Soils -- Colorado -- Nitrogen content

• The fixation of nitrogen in Colorado soils : the distribution of the nitrates and their relation to the alkalis (Agricultural Experiment Station of the Agricultural College of Colorado, 1913), by William Parker Headden (page images at HathiTrust)

Items below (if any) are from related and broader terms.

• Bacteriological studies of the fixation of nitrogen in certain Colorado soils (Agricultural Experiment Station of the Agricultural College of Colorado, 1911), by Walter G. Sackett (page images at HathiTrust)
• The fixation of nitrogen in some Colorado soils (Agricultural Experiment Station of the Agricultural College of Colorado, 1910), by William Parker Headden (page images at HathiTrust)
• The fixation of nitrogen in some Colorado soils : a further study (Agricultural Experiment Station of the Agricultural College of Colorado, 1910), by William Parker Headden (page images at HathiTrust)
• Fixation of nitrogen in Colorado soils : occurrence of nitrates on rocks (Agricultural Experiment Station of the Agricultural College of Colorado, 1922), by William Parker Headden (page images at HathiTrust)
• The nitrate question in Colorado : a review for the farmer (Colorado Experiment Station, 1925), by William Parker Headden (page images at HathiTrust)

• Nitrogen in the subsurface environment (Corvallis, Oregon : U.S. Environmental Protection Office, Office of Research and Development, National Environmental Research Center, 1975., 1975), by M.L. Rowe, Susan Stinnett, United States. Environmental Protection Agency. Office of Research and Development, East Central Oklahoma State University, and Or.) National Environmental Research Center (Corvallis (page images at HathiTrust)
• Nitrate removal from water at the water-mud interface in wetlands (U.S. Environmental Protection Agency, Office of Research and Development, Corvallis Environmental Research Laboratory, 1976), by W. H. Patrick, Louisiana Agricultural Experiment Station, and United States. Environmental Protection Agency. Office of Research and Development (page images at HathiTrust; US access only)
• Effects of prescribed fire on soil nitrogen levels in a cutover Douglas-fir/western larch forest (U.S. Dept. of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station, 1981), by Martin F. Jurgensen, A. E. Harvey, Michael J. Larsen, and Intermountain Forest and Range Experiment Station (Ogden, Utah) (page images at HathiTrust)
• Nitrogen enrichment of two forest ecosystems by red alder (Pacific Northwest Forest and Range Experiment Station, U.S. Dept. of Agriculture, 1969), by Robert F. Tarrant (page images at HathiTrust)
• The influence of residue removal and prescribed fire on distributions of forest nutrients (U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1985), by Susan N. Little, Glen O. Klock, and Or.) Pacific Northwest Forest and Range Experiment Station (Portland (page images at HathiTrust)
• Total soil nitrogen analysis using micro-Kjeldahl digestion and portable distillation equipment (U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1973), by J. Michael Geist and Or.) Pacific Northwest Forest and Range Experiment Station (Portland (page images at HathiTrust)
• Der weisse Senf als Stickstoffvermehrer des Bodens. (C.A. Kaemmerer, 1895), by Stanislaus von Kowerski (page images at HathiTrust)
• The effect of organic mulches upon nitrate content of the soil. ([Ithaca, N. Y.], 1924), by Rufus William Johnson (page images at HathiTrust)
• Adsorption of nitrate by soil and insoluble powders. (Ithaca, N. Y., 1922), by Shijin Dong (page images at HathiTrust)
• The carbon nitrogen ratio in soils. ([Ithaca, N. Y.], 1925), by Stirling Waterman (page images at HathiTrust)
• Soil conditions promoting azofication. ([Ithaca, N. Y.], 1923), by Nathaniel Elmer Winters (page images at HathiTrust)
• R & D on a fertilizer sensor and control system : phase I report (U.S. Dept. of Energy ;, 1987), by John Colburn, United States. Dept. of Energy. Office of Conservation and Solar Applications. Office of Industrial Programs, United States. Dept. of Energy. Idaho Operations Office, and Aguila Corporation (page images at HathiTrust)
• Soil and applied nitrogen (University of Wisconsin--Extension, 1973), by L. M. Walsh and University of Wisconsin--Extension. Cooperative Extension Programs (page images at HathiTrust; US access only)
• Decomposition of wood and bark sawdusts in soil, nitrogen requirements and effects on plants (U.S. Dept. of Agriculture, 1965), by Franklin E. Allison (page images at HathiTrust)
• Nitrogen and irrigation management to reduce return-flow pollution in the Columbia Basin (Ada, Oklahoma : U.S. Environmental Protection Agency, Office of Research and Development, Robert S. Kerr Environmental Research Laboratory, 1976., 1976), by Brian Lester McNeal, Bobby L. Carlile, Washington State University. Department of Agronomy and Soils, United States. Environmental Protection Agency. Office of Research and Development, and Robert S. Kerr Environmental Research Laboratory (page images at HathiTrust)
• The effect of available nitrogen on the protein content and yield of wheat (Agricultural Experiment Station, University of Idaho, 1922), by Ray E. Neidig and Robert Shirley Snyder (page images at HathiTrust)
• The relation of the yield and protein content of wheat to the nitrogen content of the soil under ten years of different systems of cropping (Agricultural Experiment Station, University of Idaho, 1926), by Ray E. Neidig and Robert Shirley Snyder (page images at HathiTrust)
• The chemical nature of the organic nitrogen in the soil (Agricultural Experiment Station, Iowa State College of Agriculture and Mechanic Arts, 1911), by S. L. Jodidi (page images at HathiTrust)
• Nitrate assimilation in soils (Agricultural Experiment Station, Iowa State College of Agriculture and Mechanic Arts, 1931), by F. B. Smith and P. E. Brown (page images at HathiTrust; US access only)
• Determination of amino acids and nitrates in soils : amino acids, ammonia and nitrates in manured and limed soil (Agricultural Experiment Station, Iowa State College of Agriculture and Mechanic Arts, 1915), by R. S. Potter and Robert Shirley Snyder (page images at HathiTrust)
• The chemical nature of the organic nitrogen in the soil, second part (Agricultural Experiment Station, Iowa State College of Agriculture and the Mechanic Arts, 1911), by S. L. Jodidi and A. A. Wells (page images at HathiTrust)
• Effect of some manganese salts on ammonification and nitrification (Agricultural Experiment Station, Iowa State College of Agriculture and Mechanic Arts, 1916), by P. E. Brown and G. A. Minges (page images at HathiTrust)
• Nitrification in acid soils (Agricultural Experiment Station, Iowa State College of Agriculture and Mechanic Arts, 1920), by R. E. Stephenson (page images at HathiTrust)
• Nitrogen transformations in waterlogged soil (Louisiana State University and Agricultural and Mechanical College, Agricultural Experiment Station, 1971), by M. E. Tusneem and W. H. Patrick (page images at HathiTrust; US access only)
• A study on the influence of climate upon the nitrogen and organic matter content of the soil (University of Missouri, College of Agriculture, Agricultural Experiment Station, 1930), by Hans Jenny (page images at HathiTrust; US access only)
• Methods of incorporating organic matter with the soil in relation to nitrogen accumulations (University of Missouri, College of Agriculture, Agricultural Experiment Station, 1936), by William A. Albrecht (page images at HathiTrust; US access only)
• The nitrate nitrogen in the soil as influenced by the crop and soil treatments (University of Missouri, College of Agriculture, Agricultural Experiment Station, 1937), by William A. Albrecht (page images at HathiTrust; US access only)
• Speed and accuracy in determination of total nitrogen : the use of selenium and other catalysts (University of Missouri, College of Agriculture, Agricultural Experiment Station, 1937), by A. E. Murneek and Peter H. Heinze (page images at HathiTrust; US access only)
• Nitrate production in soils as influenzed by cropping and soil treatments / W.A. Albrecht. (University of Missouri, College of Agriculture, Agricultural Experiment Station, 1938), by William A. Albrecht (page images at HathiTrust; US access only)
• Investigations relative to the use of nitrogenous materials, 1898-1907 (New Jersey Agricultural Experiment Stations, 1909), by Edward B. Voorhees and Jacob G. Lipman (page images at HathiTrust)
• Factors relating to the availability of nitrogenous plant-foods (New Jersey Agricultural Experiment Stations, 1912), by Jacob G. Lipman (page images at HathiTrust)
• Experiments on the accumulation and utilization of atmospheric nitrogen in field soils (New Jersey Agricultural Experiment Stations, 1912), by Jacob G. Lipman (page images at HathiTrust)
• Nitrogen utilization in field and cylinder experiments (New Jersey Agricultural Experiment Stations, 1914), by Jacob G. Lipman (page images at HathiTrust)
• Pot experiments on the availability of nitrogen and organic compounds (New Jersey Agricultural Experiment Stations, 1914), by Jacob G. Lipman (page images at HathiTrust)
• Some relations of certain higher plants to the formation of nitrates in soils (Cornell University, 1913), by T. L. Lyon and James A. Bizzell (page images at HathiTrust)
• Some relations of green manures to the nitrogen of a soil (Cornell University, 1928), by T. L. Lyon and B. D. Wilson (page images at HathiTrust)
• An explanation for the relative effects of timothy and clover residues in the soil on nitrate depression (Cornell University, 1925), by B. D. Wilson and J. K. Wilson (page images at HathiTrust)
• Solvent action of nitrification and sulfofication (Ohio Agricultural Experiment Station, 1921), by John W. Ames (page images at HathiTrust)
• The gain in nitrogen during a five-year pot experiment with different legumes (Agricultural Experiment Station of the Rhode Island State College, 1911), by Burt L. Hartwell and F. R. Pember (page images at HathiTrust)
• Optimum soil-nitrate levels for table beets : their effect on certain nitrogen-fractions in juice expressed from the leaves (Agricultural Experiment Station of the Rhode Island State College, 1934), by John B. Smith and F. S. Schlenker (page images at HathiTrust; US access only)
• Optimum soil-nitrate levels for celery, carrots, spinach, onions and beets at different growth levels (Agricultural Experiment Station, Rhode Island State College, 1947), by John B. Smith and Milton Salomon (page images at HathiTrust; US access only)
• Relation of the total nitrogen of the soil to its needs as shown in pot experiments (Texas Agricultural Experiment Stations, 1912), by G. S. Fraps (page images at HathiTrust)
• Relation of soil nitrogen, nitrification and ammonification to pot experiments (Texas Agricultural Experiment Station, 1921), by G. S. Fraps (page images at HathiTrust)
• Occurrence of nitrites in soils (Texas Agricultural Experiment Station, 1930), by G. S. Fraps and A. J. Sterges (page images at HathiTrust)
• Estimation of nitric and nitrous nitrogen in soils (Texas Agricultural Experiment Station, 1931), by G. S. Fraps and A. J. Sterges (page images at HathiTrust)
• The relation of nitrate nitrogen and nitrification to the growth of tobacco following timothy (Agricultural Experiment Station of the University of Wisconsin, 1930), by R. P. Thomas (page images at HathiTrust; US access only)
• Some factors concerned in the fixation of nitrogen by Azotobacter (The University of Wisconsin Agricultural Experiment Station, 1910), by Conrad Hoffman and Bernard Wernick Hammer (page images at HathiTrust)
• Effects of winter cover crops on growth, quality and nitrogen nutrition of Maryland tobacco (University of Maryland, Agricultural Experiment Station, 1957), by G. L. Steffens and Orman E. Street (page images at HathiTrust; US access only)
• Lysimeter experiments. VI, The effect of cropping and fertilization on the losses of nitrogen from the soil (Cornell University, 1944), by James A. Bizzell (page images at HathiTrust; US access only)
• Relation of phosphorus and nitrogen in soil to the composition of wheat (Ohio Agricultural Experiment Station, 1917), by John W. Ames and Geo. E. Boltz (page images at HathiTrust)
• Soil nitrogen complexes. I, Chromatography of amino compounds in soil hydrolysates (Ohio Agricultural Experiment Station, 1958), by J. L. Young and J. L. Mortensen (page images at HathiTrust; US access only)
• The economy of soil nitrogen under semiarid conditions (Oklahoma Agricultural and Mechanical College, Agricultural Experiment Station, 1933), by H. H. Finnell (page images at HathiTrust; US access only)
• The production of active nitrogen in the soil (Texas Agricultural Experiment Stations, 1908), by G. S. Fraps (page images at HathiTrust)
• Lysimeter experiments. V, Comparative effects of ammonium sulfate and sodium nitrate on removal of nitrogen and calcium from the soil (Cornell University, 1943), by James A. Bizzell (page images at HathiTrust; US access only)
• Nitrous acid and the loss of nitrogen (Cornell University, 1943), by J. K. Wilson (page images at HathiTrust; US access only)
• Investigations relative to the use of nitrogenous plant-foods, 1898-1912 (New Jersey Agricultural Experiment Stations, 1916), by Jacob G. Lipman and A. W. Blair (page images at HathiTrust)
• Nitrification in soils and in solutions (Gustav Fischer, 1909), by F.L. Stevens and W. A. Withers (page images at HathiTrust; US access only)
• The spirit of the soil, or, An account of nitrogen fixation in the soil by bacteria and of the production of auximones in bacterized peat (Constable and Co. ;, 1916), by Gordon D. Knox and William Beecroft Bottomley (page images at HathiTrust; US access only)
• Behavior of soil organic nitrogen (Cornell University Agricultural Experiment Station, 1968), by D. R. Bouldin and D. J. Lethwell (page images at HathiTrust; US access only)
• Determinations of nitrogen in the soils of some of the experimental fields at Rothamsted and the bearing of the results on the question of the sources of the nitrogen of our crops (Harrison, 1883), by J. B. Lawes, J. H. Gilbert, and American Association for the Advancement of Science (page images at HathiTrust)
• The relation of nitrogen and soil moisture to growth and fruitfulness of apple trees under different systems of soil management (Purdue University Agricultural Experiment Station, 1936), by Clarence E. Baker (page images at HathiTrust; US access only)
• The relation of the soil nitrogen to nodule development and fixation of nitrogen by certain legumes (New Jersey Agricultural Experiment Stations, 1926), by Gunnar Giöbel (page images at HathiTrust)
• Experiments on the accumulation and utilization of atmospheric nitrogen in the soil (New Jersey Agricultural Experiment Stations, 1905), by Edward B. Voorhees and Jacob G. Lipman (page images at HathiTrust)
• The influence of energy material upon the relation of soil microorganisms to soluble plant food (North Dakota Agricultural College, Government Agricultural Experiment Station for North Dakota, 1916), by C. J. T. Doryland (page images at HathiTrust)
• A study of the production and movement of nitric nitrogen in an irrigated soil (Utah Agricultural College Experiment Station, 1909), by Robert Stewart and Joseph Eames Greaves (page images at HathiTrust)
• The nitrogen and humus problem in dry-land farming (Utah Agricultural College Experiment Station, 1910), by Robert Stewart (page images at HathiTrust)
• The movement of nitric nitrogen in soil and its relation to "nitrogen fixation" (Utah Agricultural College Experiment Station, 1911), by Robert Stewart and Joseph Eames Greaves (page images at HathiTrust)
• The nitric nitrogen content in the country rock (Utah Agricultural College Experiment Station, 1914), by Robert Stewart and William Peterson (page images at HathiTrust)
• Further studies of the nitric nitrogen content of the country rock (Utah Agricultural College Experiment Station, 1917), by Robert Stewart and William Peterson (page images at HathiTrust)
• Availability of nitrogen in some organic vegetable substances. ([Place of publication not identified] : [publisher not identified], 1923., 1923), by Paul Serex (page images at HathiTrust; US access only)
• On the correlation between the nitrate content of the soil and the chlorotic condition of maize. ([Place of publication not identified] : [publisher not identified], 1923., 1923), by Mehmed Ali (page images at HathiTrust; US access only)
• Adaptability of nitrate specific ion electrode for nitrate analysis in tropical soils (Hawaii Agricultural Experiment Station, 1974), by Vethaiya Balasubramanian and Yoshinori Kanehiro (page images at HathiTrust; US access only)
• The influence of nitrogen in soil on azofication (Utah Agricultural College Experiment Station, 1923), by Joseph Eames Greaves and D. H. Nelson (page images at HathiTrust)
• Influence of rotation and manure on the nitrogen, phosphorus, and carbon of the soil (Utah Agricultural Experiment Station, 1936), by Joseph Eames Greaves and C. T. Hirst (page images at HathiTrust; US access only)
• The influence of cropping on the nitrogen, phosphorus, and organic matter of the soil under irrigation farming (Utah Agricultural Experiment Station, 1943), by Joseph Eames Greaves and C. T. Hirst (page images at HathiTrust; US access only)
• The effect of certain pesticides on nitrification in the soil (West Virginia University Agricultural Experiment Station, 1954), by H. A. Wilson (page images at HathiTrust; US access only)
• Ammonification and nitrification in a strip mine spoil (West Virginia University Agricultural Experiment Station, 1955), by H. A. Wilson and Gwendolyn Stewart (page images at HathiTrust; US access only)
• Nitrate production as affected by grain-crop residues on the surface of the soil (University of Nebraska, College of Agriculture, Agricultural Experiment Station, 1943), by Thomas M. McCalla and J. C. Russel (page images at HathiTrust; US access only)
• The breakdown and movement of agricultural chemicals in soils (Montana Agricultural Experiment Station, Montana State College, 1969), by James R. Sims and Hayden Ferguson (page images at HathiTrust; US access only)
• The biochemical decomposition of nitrogenous substances in soils (U.S. G.P.O., 1915), by W. P. Kelley (page images at HathiTrust)
• The residual effects of alfalfa on corn yield and on the nitrogen and organic matter content of a Cecil sandy loam (University of Georgia, College of Agriculture, Experiment Stations, 1971), by L. S. Jones (page images at HathiTrust; US access only)
• Soil nitrogen : supply processes and crop requirements (North Carolina State University, 1972), by William Victor Bartholomew, United States. Agency for International Development, and North Carolina Agricultural Experiment Station (page images at HathiTrust; US access only)
• Nitrogen in forage production (Agricultural Experiment Station, 1953), by W. W. Woodhouse, D. S. Chamblee, and North Carolina Agricultural Experiment Station (page images at HathiTrust; US access only)

More items available under broader and related terms at left.