Results 141 to 150 of about 387 (172)

Theory to predict potentially mineralizable nitrogen in soils

Soil Biology and Biochemistry, 1994
Abstract A new theory, based on the diffusion of NH 4 + ions during incubation, is put forward to predict potentially mineralizable N ( No ) in soils. Its validity is tested using predicted real No , based on the regression analysis of experimental data and also it is compared with the conventional one-pool exponential model of Stanford and Smith (
Gamini Seneviratne, Jayantha karunaratne, S.A. Kulasooriya, Thomas Rosswall   +3 more
openaire   +1 more source

Rapid Methods to Determine Potentially Mineralizable Nitrogen in Broiler Litter

Journal of Environmental Quality, 2001
ABSTRACTAlthough broiler (chicken, Gallus gallus domesticus) litter has long been used as a fertilizer, estimating the rate required to supply a desired amount of plant‐available N is still hampered by the lack of rapid methods to estimate potentially mineralizable nitrogen (PMN).
O S, Qafoku, M L, Cabrera, W R, Windham, N S, Hill   +3 more
openaire   +2 more sources

Evaluation of Some Indices of Potentially Mineralizable Nitrogen in Soil

Soil Science Society of America Journal, 2007
A series of soil N mineralization indices were evaluated using 153 samples chosen from arable fields representing a wide range of soil types, management practices, and climatic zones. These indices were compared against potentially mineralizable N (N 0 ) determined by aerobic incubation at 25°
Sharifi M, Zebarth BJ, Burton DL, Grant CA, Cooper JM   +4 more
openaire   +2 more sources

Potentially Mineralizable Nitrogen in Disturbed and Undisturbed Soil Samples

Soil Science Society of America Journal, 1988
Abstract Calculation of the correct nitrogen (N) fertilizer rate for a crop requires an estimate of the amount of N that mineralizes from soil organic matter during the growing season. A method proposed by Stanford and Smith for estimating N mineralization sometimes results in overpredictions which may be due to the use of disturbed ...
M. L. Cabrera, D. E. Kissel
openaire   +1 more source

A Rapid Method to Estimate Potentially Mineralizable Nitrogen in Soil

Soil Science Society of America Journal, 2002
Rapid estimates of mineralizable N in soil are important for management decisions and soil quality assessments. We adapted and evaluated a rapid method based on measuring the gas pressure generated when soil is treated with Ca(ClO) 2 in a closed vessel.
L. I. Picone, M. L. Cabrera, A. J. Franzluebbers   +2 more
openaire   +1 more source

Potential of Chemically Labile Fractions to Measure Mineralizable Soil Nitrogen

Communications in Soil Science and Plant Analysis, 2009
Nitrogen (N) in the soil is largely organic and is available to crops only after it is mineralized to inorganic N by microbial or enzyme action. To develop a soil test for guiding N applications, a method to predict the relative amount of organic N that will mineralize in a growing season is necessary.
C. G. Kowalenko, D. Babuin
openaire   +1 more source

Models for Predicting Potentially Mineralizable Nitrogen and Decomposition Rate Constants

Soil Science Society of America Journal, 1986
Abstract Two equations, a single exponential: N t = N o (1 − e ‐kt
J. R. Deans, J. A. E. Molina, C. E. Clapp   +2 more
openaire   +1 more source

Ridge Tillage Concentrates Potentially Mineralizable Soil Nitrogen, Facilitating Maize Nitrogen Uptake

Soil Science Society of America Journal, 2014
Ridge tillage (RT) can promote increases in soil C and aggregation at greater rates than conventional tillage, but few studies have investigated how RT may affect soil N distributions across the row/inter-row space. Using a spatially intensive sampling design, we monitored soil potentially mineralizable N (PMN), inorganic N, and plant tissue N in a ...
Daniel A. Kane, Sieglinde S. Snapp, Adam S. Davis   +2 more
openaire   +1 more source

Estimation of potentially mineralizable soil nitrogen from chemical and taxonomic criteria

Communications in Soil Science and Plant Analysis, 1982
Abstract Estimates of mineralization of soil organic N are often needed to predict N fertilizer requirements of crops. G. Stanford and his collaborators developed laboratory techniques to estimate potentially mineralizable N (NO) in soils and a rate constant for mineralization (k).
C. A. Jones, L. F. Ratliff, P. T. Dyke
openaire   +1 more source

OXIDATIVE RELEASE OF POTENTIALLY MINERALIZABLE SOIL NITROGEN BY ACID PERMANGANATE EXTRACTION

Soil Science, 1978
The relation of potentially mineralizable soil nitrogen, No, to the oxidative release of NH4-N from soil organic matter during extraction with acid KMnO4 was investigated, using 62 soils. Included in the study were members of 8 soil orders comprising 43 noncalcareous and 19 calcareous soils.
GEORGE STANFORD, S. J. SMITH
openaire   +1 more source