Modeling Soil Solution, Mineral Formation and Weathering

2015 ◽  
pp. 37-60
Author(s):  
Donald L. Suarez ◽  
Sabine Goldberg
Keyword(s):  
Soil Solution ◽  
Mineral Formation

SOIL WATER CONTENT AFFECTS THE AVAILABILITY OF PHOSPHATE

1985 ◽  
pp. 185-189
Author(s):  
M.C.H.Mouat Pieter Nes
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Soil Solution ◽  
Equivalent Reduction

Reduction in water content of a soil increased the concentration of ammonium and nitrate in solution, but had no effect on the concentration of phosphate. The corresponding reduction in the quantity of phosphate in solution caused an equivalent reduction in the response of ryegrass to applied phosphate. Keywords: soil solution, soil water content, phosphate, ryegrass, nutrition.

Mineralogical-petrographic Features of Syenitic Migmatites of the Ilmenogorsky Miaskite Block (South Urals)

2019 ◽  
Vol 5 ◽  
pp. 26-37
Author(s):  
А.B. Nemov ◽  
E.V. Medvedeva ◽  
V.A. Kotlyarov ◽  
I.A. Blinov
Keyword(s):  
South Urals ◽  
Mineral Formation ◽  
Physicochemical Conditions ◽  
Late Generation

Syenitic migmatites of the contact of the Ilmenogorsky miaskite block are characterized by high (>500 ppm) contents of REEs, which are mainly hosted in fuorapatite and titanite of the leucosome. Apatite exhibits zoned and sectorial composition with decreasing REE and Si contents and increasing Cа, P, and F contents from central parts to the margins indicating the change in physicochemical conditions of mineral formation. The La/Nd ratios of REE-bearing fuorapatite indicate that apatite-1 formed from a F-bearing fuid in contrast to apatite-2 formed from an alkaline, F–CO2–SO3-rich fuid during albitization. The REEs and F released by alkaline metasomatism accumulated in late generation of REE–F-bearing titanite. Migmatization of rocks was accompanied by involvement of an alkaline F–CO2–SO3-bearing fuid.

Nutrient Concentrations in Soil Solution in an Alfisol under Grapefruit Production

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 498d-498
Author(s):  
Z.L. He ◽  
A.K. Alva ◽  
D.V. Calvert ◽  
D.J. Banks ◽  
Y.C. Li
Keyword(s):  
Soil Solution ◽  
Fine Sand ◽  
Drainage Water ◽  
Tree Canopy ◽  
Nutrient Concentrations ◽  
Sour Orange ◽  
Parallel Study ◽  
Ph Measurements ◽  
The Mean ◽  
N Rates

A field experiment was conducted in a Riviera fine sand (Alfisol) with 25-year-old `White Marsh' grapefruit trees on Sour orange rootstock to monitor the downward transport of nutrients from fertilization practices. Fertilizer was applied as either dry granular broadcast (three applications/year) or fertigation (15 applications/year) at N rates of 56, 112, 168, and 336 kg/ha per year using a N:P:K blend (1.0:0.17:1.0). Soil solution was sampled bi-weekly from suction lysimeters, installed under the tree canopy, about 120 cm from the tree trunk, at two depths representing above (120 cm) and below (180 cm) the hard pan. The concentrations of K, Ca, and Mg were greater at the 180- than at 120-cm depth, whereas, the converse was true with respect to the concentration of P in soil solution. Over a 2-year period, the mean concentrations of P and K varied from 0.031-0.976 and 150-250 mg·L–1, respectively. Increased rate of fertilization also appeared to increase the concentrations of Ca and Mg in the soil solution. This could be due to effects of slight acidification of the soil with increased rates of ammonium form of N. A parallel study on pH measurements has shown evidence of soil acidification, under the tree canopy, with increased rates of ammonium fertilization. In a bedded grove, the soil solution above the hard pan is likely to seep into the water furrow, which is discharged into the drainage water.

A Glass Filter Soil Solution Sampler

1978 ◽  
Vol 42 (5) ◽  
pp. 834-835 ◽  
Author(s):  
F. Leslie Long
Keyword(s):  
Soil Solution ◽  
Glass Filter

On Biomineralization

1989 ◽  
Author(s):  
Heinz A. Lowenstam ◽  
Stephen Weiner
Keyword(s):  
Medical Research ◽  
Design Principles ◽  
Mineral Formation ◽  
Medical Problems ◽  
Basic Principles ◽  
Mineralized Tissues ◽  
Mineralization Processes ◽  
Archaeological Artifacts

Focusing on the basic principles of mineral formation by organisms, this comprehensive volume explores questions that relate to a wide variety of fields, from biology and biochemistry, to paleontology, geology, and medical research. Preserved fossils are used to date geological deposits and archaeological artifacts. Materials scientists investigate mineralized tissues to determine the design principles used by organisms to form strong materials. Many medical problems are also associated with normal and pathological mineralization. Lowenstam, the pioneer researcher in biomineralization, and Weiner discuss the basic principles of mineral formation by organisms and compare various mineralization processes. Reference tables listing all known cases in which organisms form minerals are included.

Clay Mineral Formation in an Alpine Environment

1971 ◽  
Vol 19 (6) ◽  
pp. 361-374 ◽  
Author(s):  
Robert C. Reynolds
Keyword(s):  
Clay Mineral ◽  
Mineral Formation ◽  
Alpine Environment

Analysing the combined effect of wetted area and irrigation volume on olive tree transpiration using a SPAC model with a multi-compartment soil solution

2017 ◽  
Vol 35 (5) ◽  
pp. 409-423 ◽  
Author(s):  
Omar García-Tejera ◽  
Álvaro López-Bernal ◽  
Francisco Orgaz ◽  
Luca Testi ◽  
Francisco J. Villalobos
Keyword(s):  
Soil Solution ◽  
Olive Tree ◽  
Combined Effect ◽  
Tree Transpiration ◽  
Wetted Area ◽  
Irrigation Volume
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