Reference health
Fertilizer and temperature effects on urea hydrolysis in undisturbed soil
12/12 checkable references clean · checked 2026-07-22
Every reference with a DOI in the deposited reference list resolved to a known work in Crossref or DataCite at the dated check, and none carried a retraction, withdrawal, or removal notice.
12 without a DOI — not checked. A reference deposited without a DOI is never matched by title or guessed at; it stays outside the checked set, and this line discloses that.
The 12 checked references that resolve
resolves10.2136/sssaj1972.03615995003600020030x
Concerning the Location and Persistence of Soil Urease
resolves10.2136/sssaj1970.03615995003400060015x
Extraction and Colorimetric Determination of Urea in Soils
resolves10.2136/sssaj1958.03615995002200030016x
Influence of Soil Temperature on Urea Hydrolysis and Subsequent Nitrification
resolves10.1126/science.166.3904.514
Nitrogen Enrichment of Surface Water by Absorption of Ammonia Volatilized from Cattle Feedlots
resolves10.2136/sssaj1963.03615995002700010019x
Urea Hydrolysis and Transformation in Some Illinois Soils
resolves10.1016/0038-0717(80)90075-9
A comparison of sulphatase, urease and protease activities in planted and in fallow soils
resolves10.2136/sssaj1977.03615995004100020036x
Relationships Between Soil Urease Activity and Other Soil Properties
The 12 references without a DOI — listed, not checked
no DOI — not checkedAllison FE (1965) Organic carbon. In: Black CA, Evans DD, White IL, Ensminger LE, Clark FE (eds) Methods of soil analysis, Part II. Am Soc Agron, Madison, Wisconsin, pp 1372?1376
no DOI — not checkedBremner JM (1965) Total nitrogen. In: Black CA, Evans DD, White IL, Ensminger LE, Clark FE (eds) Methods of soil analysis, Part II. Am Soc Agron, Madison, Wisconsin, pp 1171?1175
no DOI — not checkedBremner JM, Mulvaney RL (1978) Urease activity in soils. In: Burns RG (ed) Soil enzymes. Academic Press, New York, pp 149?196
no DOI — not checkedDay PR (1965) Particle fractionation and particle size analysis. In: Black CA, Evans DD, White IL, Ensminger LE, Clark FE (eds) Methods of soil analysis, Part I. Am Soc Agron, Madison, Wisconsin, pp 1171?1175
no DOI — not checkedGasser JKR (1964) Urea as a fertilizer. Soil Fert 27:175?180
no DOI — not checkedGutfreund H (1972) Enzymes: Physical principles. Wiley Interscience, London
no DOI — not checkedKissel DE, Cabrera ML (1988) Factors affecting urease activity. In: Bock BR, Kissel DE (eds) Ammonia volatilization from urea fertilizers. TVA, National Fertilizer Development Center, Muscle Shoals, Alabama, pp 53?66
no DOI — not checkedOlsen SR, Sommers LE (1965) Phosphorus. In: Black CA, White IL, Ensminger LE, Clark FE (eds) Methods of soil analysis, Part II. Am Soc Agron, Madison, Wisconsin, pp 403?430
no DOI — not checkedPeech M (1965) Hydrogen ion activity. In: Black CA, White II, Ensminger LE, Clark FE (eds) Methods of soil analysis, Part II. Am Soc Agronomy, Madison, Wisconsin, pp 914?926
no DOI — not checkedRachinskii VV, Pelttser AS (1967) Effect of temperature on rate of decomposition of urea in soil. Agrokhimiya 10:75?77
no DOI — not checkedVlek PLG, Carter MF (1983) The effect of soil environment and fertilizer modifications on the rate of urea hydrolysis. Siuk Scu 136:56?63
no DOI — not checkedZhou LK (1984) The urease activity and urea in soils. Adv Soil Sci (Chinese) 1:35?39
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