NITROGEN TRANSFORMATIONS IN AN INCUBATED SOIL AS AFFECTED BY COMBINATIONS OF MOISTURE CONTENT AND TEMPERATURE AND ADSORPTION-FIXATION OF AMMONIUM

1976 ◽  
Vol 56 (2) ◽  
pp. 63-70 ◽  
Author(s):  
C. G. KOWALENKO ◽  
D. R. CAMERON
Keyword(s):  
Clay Loam ◽  
Nitrogen Transformations ◽  
Clay Loam Soil ◽  
Loam Soil ◽  
Concurrent Study ◽  
Effects Of Temperature ◽  
Temperature Interaction ◽  
The Relationship ◽  
Over Time ◽  
Temperature Water

An incubation experiment was conducted on a clay loam soil using a factorial design to study the effects of temperature, water content, and applied NH4+-N on the change of NO3−-N and NH4+-N concentrations over time. Each of the factors and their interactions were highly significant, indicating the importance of the often neglected moisture–temperature interaction. Due to this interaction, optimum moisture contents for the activity of the nitrifying population appeared to be dependent upon temperature. Approximately one half of the added NH4+ was fixed within 2 days after (NH4)2SO4 was added to the soil. A concurrent study showed that soluble NH4+, exchangeable NH4+ and clay-fixed NH4+ existed in equilibrium upon adding NH4+. A Langmuir kinetic model might describe the relationship between exchangeable and fixed NH4+ whereas a nonlinear Freundlich equilibrium model yielded the best agreement between the soluble and exchangeable NH4+.

NITROGEN TRANSFORMATIONS AND TRANSPORT OVER 17 MONTHS IN FIELD FALLOW MICROPLOTS USING 15N

1978 ◽  
Vol 58 (1) ◽  
pp. 69-76 ◽  
Author(s):  
C. G. KOWALENKO
Keyword(s):  
Background Level ◽  
Sampling Period ◽  
Early Spring ◽  
Relative Importance ◽  
Clay Loam ◽  
Nitrogen Transformations ◽  
Fertilizer N ◽  
Clay Loam Soil ◽  
Loam Soil ◽  
High Precipitation

A field experiment with an Ottawa area clay loam soil utilizing open-ended microplots and 15N-labelled fertilizer showed the relative importance of seasons on transformation and transport of nitrogen. Denitrification appeared to be appreciable during the growing season; about 39% of the fertilizer N was denitrified in 86 days (May–Sept.) and 65% was lost after 511 days but leaching losses were included in the latter period. Nitrification of fertilizer N was very rapid with extractable NH4+-N approximating background level within the first 43 days. Immobilization of fertilizer N was negligible in the first 159 days and only a small amount was immobilized during the remainder of the experiment. Mineralization of soil N averaged 0.77 and 1.10 kg N/ha/day in the first two sampling periods. Clay fixation of NH4+-N was significant in this soil with 59% of the 152 kg N/ha applied being immediately fixed. Over one-half (66%) of this recently fixed NH4+-N was released in the first 86 days of the experiment with the remainder held tightly through the sampling period. Movement of fertilizer N was greatest in the late fall and early spring, i.e. periods of high precipitation and low evaporation.

scholarly journals Changes in the sorption–desorption of fungicides over time in an amended sandy clay loam soil under laboratory conditions

2012 ◽  
Vol 12 (7) ◽  
pp. 1111-1123 ◽  
Author(s):  
Jesús M. Marín-Benito ◽  
M. Soledad Andrades ◽  
M. Sonia Rodríguez-Cruz ◽  
María J. Sánchez-Martín
Keyword(s):  
Clay Loam ◽  
Clay Loam Soil ◽  
Sandy Clay Loam ◽  
Laboratory Conditions ◽  
Sandy Clay ◽  
Loam Soil ◽  
Over Time

scholarly journals Investigation of the Relationship between Three- and One-Dimensional Infiltration Using a Mini Disc Infiltrometer

Proceedings ◽  
2018 ◽  
Vol 2 (11) ◽  
pp. 660
Author(s):  
George Kargas ◽  
Paraskevi Londra ◽  
Konstantinos Anastasiou
Keyword(s):  
Soil Analysis ◽  
Silty Clay ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Silty Clay Loam ◽  
One Dimensional ◽  
Loam Soil ◽  
The Difference ◽  
Disc Infiltrometer ◽  
The Relationship

Disc infiltrometer experiments were conducted in the laboratory on two disturbed soils, a loam and a silty clay loam soil, in order to investigate the relationship between three- and one-dimensional infiltration using the proposed equation of Smettem et al. A mini disc infiltrometer of a radius of 45 mm with suction ranged from −5 mm to −70 mm was used. Three- and one-dimensional infiltration tests were performed on repacked cores by applying pressure heads −70, −40 and −10 mm for loam soil, and −30 and −10 mm for silty clay loam soil. Analysis of the results showed that the difference between the three- and one-dimensional infiltration is linear with time confirming the equation of Smettem et al. [1]. Also, this difference is used to calculate the value of an additional infiltration parameter.

Effect The Treatments of Biofertilizer and Mineral Fertilizer on Content of N P K of Soil Cultivated With Crop Corn (Zea Mays L).

2019 ◽  
Vol 9 (2) ◽  
pp. 247-256
Author(s):  
Mohammed Aajmi Salman ◽  
Jawad A. Kamal Al-Shibani
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Mineral Fertilizer ◽  
Silty Clay ◽  
Clay Loam ◽  
Potassium Fertilizer ◽  
Clay Loam Soil ◽  
Silty Clay Loam ◽  
Fall Season ◽  
Loam Soil

Beneficial microorganisms play a key role in the availability of ions minerals in the soil and use Randomized Complete Block Desing ( R.C.B.D ). The objective of this paper to the study effect of the of biofertilizer and miniral treatments on availability of NPK for crop corn zea mays L.Two types of biofertilizer are Bacterial Bacillus subtilis and Fungal Trichoderma harianum. Three levels of potassium fertilizer are (2.9533, 0.4000 and 2.9533). A field experiment in fall season of 2018 Has been conducted in silty clay loam soil. The experimental Results indicated that Bacillus and Trichoderma inoculation separately or together Have made a significant effect to increase in the availability of N P K in the soil compare to other treatments. The grain yield is where (2.9533, 0.4000 and 2.9533) of bacterial and fungal bio-fertilizer and potassium fertilizers respectively as compared to the control.

Effect of Cow Manure on Dielectric Properties of Clay Loam Soil at Microwave Frequency

2012 ◽  
Vol 2 (2) ◽  
pp. 374-375
Author(s):  
Asha Buliya ◽  
◽  
K. C. Pancholi K. C. Pancholi ◽  
R. K. Paliwal R. K. Paliwal
Keyword(s):  
Dielectric Properties ◽  
Microwave Frequency ◽  
Cow Manure ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Loam Soil

Degradation of oxyfluorfen in sandy clay loam soil

2020 ◽  
Vol 8 (6) ◽  
pp. 1038-1041
Author(s):  
C Bharathi ◽  
P Murali Arthanari ◽  
C Chinnusamy
Keyword(s):  
Clay Loam ◽  
Clay Loam Soil ◽  
Sandy Clay Loam ◽  
Sandy Clay ◽  
Loam Soil

scholarly journals Extension of an extraction method for the determination of 305 organic compounds in clay-loam soil to soils of different characteristics

MethodsX ◽  
2021 ◽  
pp. 101476
Author(s):  
Andrea Acosta-Dacal ◽  
Cristian Rial-Berriel ◽  
Ricardo Díaz-Día ◽  
María del Mar Bernal-Suárez ◽  
Manuel Zumbado ◽  
...  
Keyword(s):  
Organic Compounds ◽  
Extraction Method ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Loam Soil ◽  
Different Characteristics

Managing organic carbon of sandy clay loam soil with organic amendments to promote particle aggregation

2021 ◽  
Vol 14 (4) ◽  
Author(s):  
Haroon Shahzad ◽  
Muhammad Iqbal ◽  
Noman Latif ◽  
Muhammad Arshad Khan ◽  
Qudrat Ullah Khan
Keyword(s):  
Organic Carbon ◽  
Organic Amendments ◽  
Particle Aggregation ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Sandy Clay Loam ◽  
Sandy Clay ◽  
Loam Soil
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