Bioavailability of triazine herbicides in a sandy soil profile

2001 ◽  
Vol 33 (6) ◽  
pp. 501-506 ◽  
Author(s):  
Carsten Jacobsen ◽  
Nir Shapir ◽  
Lene Jensen ◽  
Einar Jensen ◽  
Réne Juhler ◽  
...  
Keyword(s):  
Sandy Soil ◽  
Soil Profile ◽  
Triazine Herbicides

Subsoil 15N-N2O Concentrations in a Sandy Soil Profile After Application of 15N-fertilizer

2005 ◽  
Vol 72 (1) ◽  
pp. 13-25 ◽  
Author(s):  
Jan Willem van Groenigen ◽  
Pieter Jan Georgius ◽  
Chris van Kessel ◽  
Eduard W.J. Hummelink ◽  
Gerard L. Velthof ◽  
...  
Keyword(s):  
Sandy Soil ◽  
Soil Profile ◽  
15N Fertilizer

scholarly journals Distribution of water in sandy soil applied by drip

2014 ◽  
Vol 34 (6) ◽  
pp. 1175-1185 ◽  
Author(s):  
Antônio C. A. Gonçalves ◽  
Daniel S. Alves ◽  
Patricia A. A. Marques ◽  
Marcos V. Folegatti ◽  
Jefferson V. José
Keyword(s):  
Sandy Soil ◽  
Soil Profile ◽  
Water Distribution ◽  
Soil Surface ◽  
State University ◽  
Agricultural Systems ◽  
Water Losses ◽  
Local Characteristics ◽  
Irrigation Time ◽  
Installation Depth

The search for the use of water with high levels of efficiency has motivated the use of drip irrigation in several agricultural systems. However, for the efficiency be ensured, it is necessary that the water distribution in the soil profile must to be known in more details. As it is a highly variable process, function of the local characteristics, is essential the study of each case. The objective of this research was evaluating the water distribution in the soil profile, from drippers installed in surface and 0.15 m below the soil surface. The experiment was realized in the Technical Center of Irrigation (TCI) of the State University of Maringá - PR. The water monitoring in the soil profile was done with TDR probes installed in a box containing sandy soil, at the depths from 0.05 to 0.80 m; and 0.05 to 0.35 m of lateral spacing, at intervals of 0.05 m, totalizing 30 probes. The treatments were differentiated in relation of the installation depth of the emitters (0.0 and 0.15 m) and flow (1, 2, 4, 6, and 8 L h-1). The irrigation time was 8 hours continuous with reading of the TDR probes each 30 minutes. The results allowed concluding that the wet area with the emitter positioned on the soil surface was directly proportional to the flow increase. For the underground dripper, this area was substantially smaller and the water losses by percolation were higher, mainly to the flows higher than 4 L h-1, which provided to unacceptable water losses that should be avoided.

Microbial biomass and activity down the soil profile after long-term addition of farmyard manure to a sandy soil

2016 ◽  
Vol 8 (1) ◽  
pp. 29-38 ◽  
Author(s):  
André Sradnick ◽  
Meike Oltmanns ◽  
Joachim Raupp ◽  
Rainer Georg Joergensen
Keyword(s):  
Microbial Biomass ◽  
Sandy Soil ◽  
Soil Profile ◽  
Farmyard Manure

Microbial residue indices down the soil profile after long-term addition of farmyard manure and mineral fertilizer to a sandy soil

Geoderma ◽  
2014 ◽  
Vol 226-227 ◽  
pp. 79-84 ◽  
Author(s):  
André Sradnick ◽  
Meike Oltmanns ◽  
Joachim Raupp ◽  
Rainer Georg Joergensen
Keyword(s):  
Sandy Soil ◽  
Soil Profile ◽  
Farmyard Manure ◽  
Mineral Fertilizer ◽  
Microbial Residue

AN EVALUATION OF SOIL WATER STATUS USING TENSIOMETERS IN A SANDY SOIL PROFILE UNDER CITRUS PRODUCTION1

Soil Science ◽  
2000 ◽  
Vol 165 (4) ◽  
pp. 343-353 ◽  
Author(s):  
S. Paramasivam ◽  
A. K. Alva ◽  
A. Fares
Keyword(s):  
Soil Water ◽  
Sandy Soil ◽  
Soil Profile ◽  
Water Status ◽  
Soil Water Status

Phosphorus Movement and Speciation in a Sandy Soil Profile after Long-Term Animal Manure Applications

2007 ◽  
Vol 36 (1) ◽  
pp. 305-315 ◽  
Author(s):  
G. F. Koopmans ◽  
W. J. Chardon ◽  
R. W. McDowell
Keyword(s):  
Sandy Soil ◽  
Soil Profile ◽  
Animal Manure

Phosphorus in an arable coarse sandy soil profile after 74 years with different lime and P fertilizer applications

Geoderma ◽  
2020 ◽  
Vol 376 ◽  
pp. 114555
Author(s):  
Musibau Oyeleke Azeez ◽  
Julie Therese Christensen ◽  
Sabine Ravnskov ◽  
Goswin Johann Heckrath ◽  
Rodrigo Labouriau ◽  
...  
Keyword(s):  
Sandy Soil ◽  
Soil Profile ◽  
P Fertilizer

scholarly journals Aggregate sizes regulate the microbial community patterns in sandy soil profile

2021 ◽  
Author(s):  
Yifei Sun ◽  
Meiling Sun ◽  
Guowei Chen ◽  
Xin Chen ◽  
Baoguo Li ◽  
...  
Keyword(s):  
Microbial Community ◽  
Sandy Soil ◽  
Soil Profile ◽  
Community Patterns

scholarly journals Impact of long-term liming on sandy soil phosphorus sorption properties

2019 ◽  
Vol 70 (1) ◽  
pp. 13-20
Author(s):  
Ewa Szara ◽  
Tomasz Sosulski ◽  
Magdalena Szymańska
Keyword(s):  
Sandy Soil ◽  
Soil Profile ◽  
Water Solution ◽  
Acid Soil ◽  
Sorption Properties ◽  
Soil Parameters ◽  
Phosphorus Sorption ◽  
Bioavailable Phosphorus ◽  
Degree Of Phosphorus Saturation ◽  
Phosphorus Saturation

Abstract The static fertilisation experiment conducted in Skierniewice (Central Poland) since 1923 investigates the effect of mineral fertilisation with lime (CaNPK) or without lime (NPK) on the accumulation and release of phosphorus in reference to phosphorus sorption properties in the sandy soil profile. In the case of application of same doses of mineral fertilisers, the content of total phosphorus was higher in NPK than CaNPK soil. Parameters related to sorption capacity and bonding energy from Langmuir and Freundlich model of P sorption were significantly lower in CaNPK than NPK soil profile. This was particularly caused by a lower content of poorly crystallised hydro(oxide) aluminium and iron forms in CaNPK than NPK soil. Higher content of oxide-extractable and bioavailable phosphorus extracted with double lactate solution, dissolved reactive phosphorus in water solution as well as degree of phosphorus saturation in the CaNPK soil profile suggests higher mobility and possibility of occurrence of losses of phosphorus from the profile of limed soil than from acidified soil. Therefore, management of phosphate fertilizers on permanently limed sandy soils requires the optimisation of phosphorus doses to a greater degree corresponding to the actual take-off of the element with crop. An additional finding of the study was evidence of the possibility of re-estimating contents of bioavailable phosphorus and, as a consequence, the degree of phosphorus saturation with Mehlich3 method in strongly acid soil receiving P mineral fertilisers, which can make it difficult to use the test for fertiliser recommendation.

Rate of bentazone transformation in four layers of a humic sandy soil profile with fluctuating water table

2001 ◽  
Vol 57 (11) ◽  
pp. 1023-1032 ◽  
Author(s):  
Minze Leistra ◽  
Johan H Smelt ◽  
Arri�nne M Matser ◽  
Jaap J Bogte ◽  
Leo J?T van der Pas
Keyword(s):  
Water Table ◽  
Sandy Soil ◽  
Soil Profile
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