THE RELATIONSHIP OF SOIL TYPE TO THE CALCIUM AND MAGNESIUM CONTENT OF GREEN BEAN STEMS AND LEAVES AND OF THEIR EXPRESSED JUICE

Soil Science ◽  
1929 ◽  
Vol 27 (6) ◽  
pp. 415-432 ◽  
Author(s):  
J. F. FONDER
1999 ◽  
Vol 283 (1-2) ◽  
pp. 119-128 ◽  
Author(s):  
Iain R. Brown ◽  
Alasdair M. McBain ◽  
John Chalmers ◽  
Ian W. Campbell ◽  
Ewan R. Brown ◽  
...  

The relationship between the parathyroids and calcium metabolism has been well established. Removal of the parathyroids in mammals results in tetany accompanied by a fall in the blood calcium content (Cruickshank, Salvesen, etc.). Tetanic symptoms and their fatal consequences can be prevented in dogs by an addition of calcium lactate to the diet (Luckhardt and Goldberg) and Collip has found that parathyroid extract raises the calcium content of the blood in both normal and parathyroidectomised dogs. Later work has raised doubts as to the specificity of the calcium effect of parathyroid extract. Davies, Dickens and Dodds obtained the same effects form injections of insulin and also pituitary extracts. Contradictory results have been reported in connection with the thyroid, namely, a rise in calcium after thyroidectomy (Maxim an Vasilin), and a rise after thyroid feeding (Cahane). Mirvish and Bosman were able to produce a fall in blood calcium in rabbits both by injection of extract of suprarenal cortex and by injection of ovarian extract. Their work is in accord with that of Taylor and Caven who found a rise in serum calcium after double adrenalectomy, and that of Werner who found a rise after castration in guinea pigs and sheep.


1965 ◽  
Vol 45 (1) ◽  
pp. 96-101 ◽  
Author(s):  
D. F. Acton

Three glacial landforms (hummocky moraine, linear disintegration ridge, and washboard ridge) resulting from ice disintegration were studied to determine the relationship of the type of landform to the distribution of soil members or series. A close relationship was observed between a soil member and the nature of the slope segment on which it occurred. Calcareous Dark Brown soils were observed on the uppermost convex portion of the slope on gradients usually greater than 8%; Orthic Dark Brown soils on simple intermediate slopes or 5–8% gradient; Eluviated Dark Brown soils on slightly concave footslopes of 1–3% gradient; Rego Dark Brown wherever 3–5% slopes extended from the margin of depressions; and Gleysolic soils in the concave depressions. The extent of the soil members was found to be a function of the extent of the individual slope segment present in the landform. Orthic Dark Brown soils predominated, to approximately the same extent, on all landforms. Gleysolic soils were extensive in hummocky moraines whereas Eluviated and Calcareous Dark Brown soils were more extensive on ridged landforms, particularly on linear disintegration ridges. Rego Dark Brown soils were most extensive on washboard ridges.


1952 ◽  
Vol 30 (6) ◽  
pp. 515-519
Author(s):  
Jules Tuba ◽  
Kazie A. Siluch ◽  
Margaret I. Robinson ◽  
Neil B. Madsen

Increased levels of serum alkaline phosphatase were produced in growing rats by diets low in calcium or by the addition of sodium oxalate or rhubarb to diets containing adequate amounts of calcium. In addition, variations from normal in levels of serum phosphorus, calcium, and magnesium, as well as the ash of the tibiae, indicate that the animals were rachitic. The amount of calcium retained in the bodies of animals maintained on a diet containing rhubarb, which has a high oxalate content, were very much lower than in growing rats fed a normal calcium diet.


2003 ◽  
Vol 19 (3) ◽  
pp. 279-290 ◽  
Author(s):  
Patrice Cadet ◽  
Emmanuelle Pate ◽  
Jean Thioulouse

One hundred and nine soil samples were collected in 69 different localities along two transects, one North-South, about 900 km in length, and the other East-West (750 km in length), across Senegal and Gambia. The first transect followed a rainfall gradient and the second a human density gradient. The relationship between carbon content, C/N ratio and soil type on the abundance and species distribution of the nematodes along the transects was studied. Results showed that short-term fallows did not influence the specific structure of the communities, when compared with the nematode communities of fields located in the immediate vicinity, where Scutellonema cavenessi and Tylenchorhynchus gladiolatus were the dominant species. The expected negative influence of human disturbance on nematode occurrence seemed to be compensated by greater crop diversity, mainly near the towns. Less-disturbed areas also maintained a high diversity, but were characterized by the presence of particular species such as Xiphinema spp. Soil type was the most important factor affecting the species composition of the nematode community. As a result, nematode communities followed a distribution in areas, corresponding to the successive soil types, but did not change in relation to the human or climatic gradients. At a large scale, the study of plant-parasitic nematodes can give both different and complementary information on the ecological trends of an area to that of free-living nematodes.


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