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  1. Biomass fly ash as foliar fertilizer for hybrid aspen trees: nutrient uptake, growth response, and compatibility with nitrogen fertilizer.

    Biomass ash is an important and potentially useful by-product of the bioenergy industry. As a "proof of concept" for using biomass fly ash as a foliar fertilizer, we tested (i) whether the nutrients in the ash were absorbed by hybrid aspen trees, (ii) whether the ash affected tree growth, and (iii) whether the ash was compatible with nitrogen foliar...

    https://www.fs.usda.gov/treesearch/search?keywords=%22nitrogen+fertilization%22

    Author(s):
    William Headlee; Richard Hall
    Year:
    2015
    Keywords:
    bioenergy, 'Crandon', ethanol, poplars, short-rotation woody crops
    Source:
    Journal of Plant Nutrition. 38: 647-662.

  2. Regional variation in growth response of Coastal Douglas-fir to nitrogen fertilizer in the Pacific Northwest.

    Hypothesis testing for differences in growth responses among physiographic strata, thinning levels, and fertilizer dosage levels resulted in a set of empirical models for predicting volume increment response of even aged coastal Douglas-fir to nitrogen fertilizer. Absolute and percent responses are estimated for stands both thinned and unthinned, as a function of...

    https://www.fs.usda.gov/treesearch/search?keywords=%22nitrogen+fertilization%22

    Author(s):
    C.E. Peterson; J.W. Hazard
    Year:
    1990
    Keywords:
    Research, physiographic strata, thinning, fertilizer response, predictive models
    Source:
    Forest Science. 36(3): 625-640

  3. Stomatal conductance of seedlings of three oak species subjected to nitrogen fertilization and drought treatments

    Both nitrogen-fertilized and unfertilized white oak, bur oak, and red oak seedlings were subjected to progressive drought in a greenhouse study.

    https://www.fs.usda.gov/treesearch/search?keywords=%22nitrogen+fertilization%22

    Author(s):
    W.D. Hechler; J.O. Dawson; E.H. DeLucia
    Year:
    1991
    Keywords:
    Source:
    In: McCormick, Larry H.; Gottschalk, Kurt W., eds. Proceedings, 8th Central Hardwood Forest Conference; 1991 March 4-6; University Park, PA. Gen. Tech. Rep. NE-148. Radnor, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station: 188-193.

  4. Five Years of Nitrogen Fertilization in a Sweetgum-Oak Stand

    Diameter and height growth were significantly increased in a 20-year-old sweetgum-oak stand by annual surface application of ammonium nitrate and of complete N-P-K fertilizer. Nitrogen fertilization significantly increased the nitrogen content of foliage. With increasing nitrate application, exchangeable potassium in the soil 1 year after treatment decreased.

    https://www.fs.usda.gov/treesearch/search?keywords=%22nitrogen+fertilization%22

    Author(s):
    W. M. Broadfoot
    Year:
    1966
    Keywords:
    Source:
    Research Note SO-RN-24. New Orleans, LA: USDA-Forest Service, Southern Forest Experiment Station. 3 p.

  5. Nitrogen fertilization stimulates germination of dormant pin cherry seed

    Nitrogen fertilizers triggered germination of dormant Prunus pensylvanica L. seed naturally buried in the forest floor of 60-year-old Allegheny hardwood stands. Neither triple superphosphate nor muriate of potash applied with urea increased germination over that which occurred with urea alone. Rates as low as 56 kg/ha N from urea and calcium...

    https://www.fs.usda.gov/treesearch/search?keywords=%22nitrogen+fertilization%22

    Author(s):
    L.R. Auchmoody
    Year:
    1979
    Keywords:
    Source:
    Canadian Journal of Forest Research. 9: 514-516.

  6. Effects of soil and foliar applications of nitrogen fertilizers on a 20-year-old Douglas-fir stand

    We compared growth and cone production of Douglas-fir treated 4 years earlier with ISO pounds N per acre applied as urea prill by hand and as a 32-percent N solution applied by helicopter. Nitrogen fertilization increased growth by 3 88 ft per acre during the 4 years after treatment; this 3S-percent gain was similar for both soil (prill) and foliar (solution)...

    https://www.fs.usda.gov/treesearch/search?keywords=%22nitrogen+fertilization%22

    Author(s):
    Richard E. Miller; Steve Wert
    Year:
    1979
    Keywords:
    Nitrogen fertilizer response, fertilizer applications, cone production, Douglas-fir, Pseudotsuga menziesii
    Source:
    Res. Note PNW-RN-329. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 12 p

  7. Influence of family and nitrogen fertilizer on growth and nutrition of western hemlock seedlings.

    Effects of genotype and nitrogen fertilizer on growth and shoot nutrients of western hemlock seedlings were determined by using 11 open-pollinated families from coastal Oregon and Washington. The families differed significantly in growth, initially and after one growing season after treatment. All seedlings responded well to fertilizer, and fertilization significantly...

    https://www.fs.usda.gov/treesearch/search?keywords=%22nitrogen+fertilization%22

    Author(s):
    M.A. Radwan; D.S. DeBell; J.E. Wilcox
    Year:
    1990
    Keywords:
    Family effects, fertilizer effects, family x fertilizer interaction, seedling growth, nutrients, western hemlock
    Source:
    Res. Pap. PNW-RP-426. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 10 p

  8. Growth of nitrogen-fertilized and thinned quaking aspen (Populus tremuloides Michx.).

    Reports the results of thinning/fertilizing experiment in juvenile aspen stands.

    https://www.fs.usda.gov/treesearch/search?keywords=%22nitrogen+fertilization%22

    Author(s):
    Donald A. Perala; Paul R. Laidly
    Year:
    1989
    Keywords:
    Malacosoma disstria, Hypoxylon mammatum, mortality, volume growth, quaking aspen, Populus tremuloides
    Source:
    Research Paper NC-286. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station

  9. Biological Nitrogen Fixation in Two Tropical Forests: Ecosystem-Level Patterns and Effects of Nitrogen Fertilization

    https://www.fs.usda.gov/treesearch/search?keywords=%22nitrogen+fertilization%22

    Author(s):
    Daniela F. Cusack; Whendee Silver; William H. McDowell
    Year:
    2009
    Keywords:
    nitrogen addition, C:N, soil, forest, floor, moss, epiphyll, lichen
    Source:
    Ecosystems. 12(8): 1299-1315.

  10. Nitrogen Fertilization Increases Cottonwood Growth on Old-Field Soil

    Nitrogen (150 lb ./acre as NH4N03 ) applied to a 6-year-old eastern cottonwood plantation in an old field on Commerce silt loam soil increased diameter, basal area, and volume growth by 200 percent over untreated controls. The plantation did not respond to 100 pounds P per acre from concentrated superphosphate.

    https://www.fs.usda.gov/treesearch/search?keywords=%22nitrogen+fertilization%22

    Author(s):
    B. G. Blackmon; E. H. White
    Year:
    1972
    Keywords:
    nitrogen, cottonwood.
    Source:
    Research Note SFES-RN-143. New Orleans, LA: USDA-Forest Service, Southern Forest Experiment Station. 5 p.

  11. Long-term nitrogen fertilization increases winter injury in montane red spruce foliage (Picea rubens) foliage

    Current-year red spruce (Picea rubens Sarg.) foliage is predisposed to winter injury by one or more types of anthropogenic pollutants, particularly acidic deposition. The resultant defoliation, when severe and repeated, leads to dieback and eventual mortality of affected red spruce individuals

    https://www.fs.usda.gov/treesearch/search?keywords=%22nitrogen+fertilization%22

    Author(s):
    T.D. Perkins; G.T. Adams; S.T. Lawson; P.G. Schaberg; S.G. McNulty
    Year:
    2000
    Keywords:
    Source:
    Journal of Sustainable Forestry. 10: 165-172.

  12. Impact of vegetation control and annual fertilization on properties of loblolly pine wood at age 12

    Loblolly pine (Pinus taeda L.) stands in the Coastal Plain and Piedmont of Georgia were subjected to four intensive silvicultural regimes to monitor and record relative tree growth. Treatments included: intensive mechanical site preparation, complete vegetation control with multiple applications of herbicides, annual high rates of nitrogen...

    https://www.fs.usda.gov/treesearch/search?keywords=%22nitrogen+fertilization%22

    Author(s):
    Alexander Clark; Bruce E. Borders; Richard F. Daniels
    Year:
    2004
    Keywords:
    Source:
    Forest Products Journal Vol. 54, No. 12, p. 90-96, December 2004

  13. Nitrogen fertilization interacts with light to increase Rubus spp. cover in a temperate forest

    Nitrogen additions have caused species composition changes in many ecosystems by facilitating the growth of nitrophilic species. After 24 years of nitrogen fertilization in a 40 year-old stand at the Fernow Experimental Forest (FEF) in Central Appalachia, USA, the cover of Rubus spp. has increased from 1 to 19 % of total herbaceous-layer cover....

    https://www.fs.usda.gov/treesearch/search?keywords=%22nitrogen+fertilization%22

    Author(s):
    Christopher A. Walter; Devon T. Raiff; Mark B. Burnham; Frank S. Gilliam; Mary Beth Adams; William T. Peterjohn
    Year:
    2016
    Keywords:
    Nitrogen deposition, Herbaceous layer, Fertilization, Forest understory, Rubus, Bramble, Fernow
    Source:
    Plant Ecology. 217(4): 421-430.

  14. The Response of Bareroot Loblolly Pine Seedlings to the Amount and Timing of Nitrogen Fertilization in the Nursery

    A nursery study was conducted to observe the effects of altering the amount of nitrogen fertilizer at each application on bareroot loblolly pine (Pinus taeda L.) seedling morphology, survival and growth. The treatments were an equal amount of fertilizer applied each time, an increasing amount each time, and a schedule characterized by low amounts,...

    https://www.fs.usda.gov/treesearch/search?keywords=%22nitrogen+fertilization%22

    Author(s):
    Hans Williams; Karen Woodard; Tim Stewart
    Year:
    2004
    Keywords:
    Source:
    Gen. Tech. Rep. SRS–71. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. pp. 425-428

  15. Effect of Fertilization on Growth and Wood Properties of Thinned and Un-thinned Mid-rotation Loblolly Pine (Pinus taeda L.) Stands

    Growth and wood properties were measured on breast height cores collected from two stands, New Bern and Bertie, located in the lower Coastal Plain of North Carolina. The New Bern site was thinned before fertilizer application, and the Bertie site was not. The study was laid out in a randomized complete block design with each treatment replicated in four blocks at New...

    https://www.fs.usda.gov/treesearch/search?keywords=%22nitrogen+fertilization%22

    Author(s):
    Finto Antony; Laurence R. Schimleck; Richard F. Daniels; Alexander Clark
    Year:
    2011
    Keywords:
    wood density, specific gravity, ring width, repeated measure, mixed-effects model
    Source:
    Southern Journal of Applied Forestry 35(3):142-147

  16. Changes in canopy processes following whole-forest canopy nitrogen fertilization of a mature spruce-hemlock forest

    Most experimental additions of nitrogen to forest ecosystems apply the N to the forest floor, bypassing important processes taking place in the canopy, including canopy retention of N and/or conversion of N from one form to another. To quantify these processes, we carried out a large-scale experiment and determined the fate of nitrogen applied directly to a mature...

    https://www.fs.usda.gov/treesearch/search?keywords=%22nitrogen+fertilization%22

    Author(s):
    E. Gaige; D.B. Dail; D.Y. Hollinger; E.A. Davidson; I.J. Fernandez; H. Sievering; A. White; W. Halteman
    Year:
    2007
    Keywords:
    Source:
    Ecosystems. 10: 1133-1147.

  17. Longleaf pine flowering in response to nitrogen fertilization, branch girdling, growth substances, and cultivation

    Biweekly applications of 400 µg GA4/7 plus 25 µg NAA per bud from June 1 to August 10 promoted male and female flowering in longleaf pine (Pinus palustris Mill.), especially when combined with partial branch girdling and NH4N03 fertilization. Fertilization was the...

    https://www.fs.usda.gov/treesearch/search?keywords=%22nitrogen+fertilization%22

    Author(s):
    R.C. Hare; E.B. Snyder; R.C. Schmidtling
    Year:
    1977
    Keywords:
    Source:
    In: Proceedings of the Thirteenth Lake States Forest Tree Improvement Conference; Gen. Tech. Rep. NC-50. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Forest Experiment Station. 11-16

  18. Growth response of 35-year-old, site V Douglas-fir to nitrogen fertilizer

    During the first 4 years following application, addition of 200 to 600 pounds of nitrogen per acre increased height increment 62 percent and d.b.h. increment 79 to 160 percent. Gross basal area increment was greater with heavier fertilizer applications, but severe snowbreakage wa also increased. Thus, net production tended to be greatest with the addition of 200...

    https://www.fs.usda.gov/treesearch/search?keywords=%22nitrogen+fertilization%22

    Author(s):
    Donald L. Reukema
    Year:
    1968
    Keywords:
    Douglas-fir, nitrogen fertilizer, Wind River Experimental Forest, Washington
    Source:
    Res. Note PNW-RN-86. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 9 p

  19. Effect of nitrogen fertilizer on growth, form, and wood quality of eastern cottonwood

    A 9-year-old cottonwood plantation near Fitler, Mississippi was fertilized with ammonium nitrate (150 and 300 lbs N/A) in May 1970. Fertilizer increased diameter (b.h.) growth of dominant, codominant, and intermediate crown classes by 109, 174 and 482 percent, respectively. Form class of fertilized trees also increased. On a whole-stem basis, specific gravity declined...

    https://www.fs.usda.gov/treesearch/search?keywords=%22nitrogen+fertilization%22

    Author(s):
    D.S. DeBell; E.H. Mallonee; L.T. Alford
    Year:
    1975
    Keywords:
    cottonwood, ammonium nitrate
    Source:
    Res. Note PNW-RN-4. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 6 p

  20. Variation in foliar nitrogen and albedo in response to nitrogen fertilization and elevated CO2

    Foliar nitrogen has been shown to be positively correlated with midsummer canopy albedo and canopy near infrared (NIR) reflectance over a broad range of plant functional types (e.g., forests, grasslands, and agricultural lands). To date, the mechanism(s) driving the nitrogen-albedo relationship have not been established, and it is unknown whether factors affecting...

    https://www.fs.usda.gov/treesearch/search?keywords=%22nitrogen+fertilization%22

    Author(s):
    Haley F. Wicklein; Scott V. Ollinger; Mary E. Martin; David Y. Hollinger; Lucie C. Lepine; Michelle C. Day; Megan K. Bartlett; Andrew D. Richardson; Richard J. Norby
    Year:
    2012
    Keywords:
    albedo, nitrogen, leaf structure, nitrogen fertilization, free air CO2 enrichment
    Source:
    Oecologia. 169(4): 915-925.

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