+ Most Popular
Cunninghamia lanceolata plantations in China
Mammalian lairs in paleo ecological studies and palynology
Studies on technological possibilities in utilization of anhydrous milk fat for production of recombined butter-like products
Should right-sided fibroelastomas be operated upon?
Large esophageal lipoma
Apoptosis in the mammalian thymus during normal histogenesis and under various in vitro and in vivo experimental conditions
Poissons characoides nouveaux ou non signales de l'Ilha do Bananal, Bresil
Desensitizing efficacy of Colgate Sensitive Maximum Strength and Fresh Mint Sensodyne dentifrices
Administration of fluid by subcutaneous infusion: revival of a forgotten method
Tundra mosquito control - an impossible dream?
Schizophrenia for primary care providers: how to contribute to the care of a vulnerable patient population
Geochemical pattern analysis; method of describing the Southeastern limestone regional aquifer system
Incidence of low birth weights in a hospital of Mexico City
Graded management intensity of grassland systems for enhancing floristic diversity
Microbiology and biochemistry of cheese and fermented milk
The ember tetra: a new pygmy characid tetra from the Rio das Mortes, Brazil, Hyphessobrycon amandae sp. n. (Pisces, Characoidei)
Risk factors of contrast-induced nephropathy in patients after coronary artery intervention
Renovation of onsite domestic wastewater in a poorly drained soil
Observations of the propagation velocity and formation mechanism of burst fractures caused by gunshot
Systolic blood pressure in a population of infants in the first year of life: the Brompton study
Haematological studies in rats fed with metanil yellow
Studies on pasteurellosis. I. A new species of Pasteurella encountered in chronic fowl cholera
Dormancy breaking and germination of Acacia salicina Lindl. seeds
therapy of lupus nephritis. a two-year prospective study

Chemical transformations of urea nitrogen and movement of nitrogen in a short grass prairie soil

Chemical transformations of urea nitrogen and movement of nitrogen in a short grass prairie soil

Soil Science Society of America Journal 45(5): 893-898

ISSN/ISBN: 0361-5995

A study was conducted to quantify the temporal dynamics of the transformations of N in a simulated urine spot, to determine the effect of urea hydrolysis on pH, and to determine the depth of movement of nitrate by leaching. Miniplots of blue grama were established, and open-ended aluminum cylinders 10 cm in diameter and 40 cm in length were embedded in each plot. Simulated urine was applied to 2/3 of the plots at a rate of up to 45 g N m-2. The remaining plots were controls. After the simulated urine application, only 6% of the added N remained as urea at 2 days; no urea-N remained at 4 days. Maximum accumulation of ammonium-N (39.9 g N m-2) was simultaneous with the disappearance of urea. Elevated levels of nitrate were first detected at day 12 when 6.7 g N m-2 had accumulated. No measurable nitrite accumulated during the experiment. Through the first 4 days, 83% of the (urea + ammonium)-N in the profile was in the top 15 cm of the soil. With the rains near the end of the study, nitrification proceeded, and nitrate was leached through the profile to below the depth of the cores. Simulated urine significantly affedted soil pH to 15 cm. From an initial pH near 6.0, urea hydrolysis increased soil pH from 0.6 to 1.3 units. As nitrification proceeded after day 40, the pH decreased to below control levels.

Please choose payment method:

(PDF emailed within 1 workday: $29.90)

Accession: 004939814

Download citation: RISBibTeXText

Related references

Movement of nitrate nitrogen and transformations of urea nitrogen under field conditions. New Zealand Journal of Agricultural Research 20(4): 479-488, 1977

Short communication: Milk urea nitrogen as a predictor of urinary nitrogen and urea nitrogen excretions of late-lactation dairy cows fed nitrogen-limiting diets. Journal of Dairy Science 102(2): 1601-1607, 2019

Separating Nitrogen Polymers from Urea in Ureaform Fertilizer to Study Soil Nitrogen Transformations. Soil Science Society of America Journal 75(4): 1574-1577, 2011

Effect of various factors on movement of nitrate nitrogen in soil profiles and on transformations of soil nitrogen. Dissertation Abstracts International B, The Sciences and Engineering 31: 470, 1970

The fate of labelled nitrogen 15 urea and ammonium nitrate applied to a winter wheat crop i. nitrogen transformations in the soil. Plant and Soil 112(2): 205-214, 1988

Influence of 2 nitrogen regulators on soil nitrogen transformations and movement. Communications in Soil Science and Plant Analysis 10(12): 1505-1512, 1979

Soil nitrogen. IV.Transformations and Movement of Fertiliser Nitrogen in a Light Soil. Journal of the Science of Food and Agriculture 10(3): 192-197, 1959

Inst lysimeter studies on tracer nitrogen in forest soil 2 comparative losses of nitrogen through leaching and volatilization after the addition of urea nitrogen 15 ammonium nitrogen 15 and nitrate nitrogen 15. Soil Science 107(3): 149-159, 1969

Nitrogen soil fertilization and foliar application of urea on the yield and chemical composition of guinea grass. Pesquisa Agropecuaria Brasileira 23(9): 957-962, 1988

Transformations of fertilizer nitrogen in soil. I. Interpretations based on chemical extractions of labelled and unlabelled nitrogen. PL Soil 33: 425-435, 1970

Transformations of fertilizer nitrogen in soil part 1 interpretations based on chemical extractions of labelled and unlabelled nitrogen. Plant and Soil 33(2): 425-435, 1970

Internal cycling of nitrogen 15 in short grass prairie. Ecology (Washington D C) 58(6): 1322-1333, 1977

Transformations of fertilizer nitrogen in soil part 2 total and nitrogen 15 labelled nitrogen of soil organo mineral sedimentation fractions. Plant and Soil 33(2): 437-456, 1970

Plasma urea nitrogen levels in beef steers grazing nitrogen fertilized bermuda grass and orchard grass ladino pastures. Journal of Animal Science 47(4): 927-934, 1978

Factors affecting immobilization and release of nitrogen in soil and chemical characteristics of the nitrogen newly immobilized part 4 chemical nature of the organic nitrogen becoming decomposable due to the drying of soil. Soil Science and Plant Nutrition 19(4): 287-298, 1973