Observations sur la chlorose ferrique dans les sols viticoles calcaires du Saumurois

René Morlat

doi:10.20870/oeno-one.1976.10.4.1629

Observations sur la chlorose ferrique dans les sols viticoles calcaires du Saumurois

OENO One ◽

10.20870/oeno-one.1976.10.4.1629 ◽

1976 ◽

Vol 10 (4) ◽

pp. 359

Author(s):

René Morlat

Keyword(s):

Power Index ◽

Calcareous Soils ◽

Soil Types ◽

Geological Facies

Le vignoble de Saumur est pour partie implanté dans des sols calcaires qui dérivent de l'altération de différents faciès géologiques du Secondaire et du Tertiaire. Malgré une teneur en calcaire actif des sols et des roches toujours inférieure au seuil de résistance des porte-greffes les mieux adaptés, ces derniers chlorosent fortement sur certains substrats. L'utilisation de l'Indice de Pouvoir Chlorosant (IPC) permet d'expliquer dans la plupart des cas ce phénomène par une insuffisance en fer facilement extractible des sols concernés.L'étude met également en évidence l'importance des glauconies dans la fourniture en fer du sol à la vigne.+++The vineyards of Saumur are planted in calcareous soils derived from the weathering of different geological facies of the Mesozoic and Tertiary eras. In spite of the fact that the concentration of active calcareous matter of these soils and rocks is always less than the threshold of resistance of the best — adapted vine stocks, chlorosis bas been observed on some soil types. The use of the chlorosing power index (IPC) permits the explanation, in most cases, of this phenomena by an insufficiency of easily available iron from these soils. This study has shown the importance of glauconites in the supply of iron from the soil to the vine.

Download Full-text

Impact of phosphorus fertilization in alleviating the adverse effects of salinity on wheat grown on different soil types

Acta Agronomica Hungarica ◽

10.1556/aagr.60.2012.3.9 ◽

2012 ◽

Vol 60 (3) ◽

pp. 265-281 ◽

Cited By ~ 1

Author(s):

Enas Abd El-Hamed ◽

S. Metwally ◽

M. Matar ◽

N. Yousef

Keyword(s):

Salt Stress ◽

Adverse Effects ◽

Calcareous Soils ◽

Inorganic Phosphorus ◽

Soil Types ◽

Phosphorus Fertilization ◽

Organic P ◽

Combined Application ◽

Salinity Levels ◽

P Sources

Optimum fertilization management is an important technique to alleviate the adverse effects of salinity stress on plants. A pot experiment was conducted to evaluate the ameliorative role of inorganic phosphorus (P) and organic P sources on wheat grown under salt stress in three soil types deficient in available P. Wheat (Triticum aestivum L. cv. Shakha 93) was grown on alluvial, sandy and calcareous soils at salinity levels of 4, 8 and 12 dS/m of saturated paste extract (ECe) and supplied with a constant rate of 30 mg P2O5/kg soil as superphosphate (SP), cattle manure (CM) and a 1:1 mixture of SP and CM. The results revealed that plants grown on the sandy soil were more susceptible to the adverse effects of salinity than those planted on the alluvial one, especially at zero P. Plants grown on the calcareous soil were moderately affected. The varying soil type caused significant differences in the aboveground biomass and the uptake of N, K, P and Zn. It was obvious that P ameliorated wheat growth under salt stress, and this role was greater under moderate and high salinity. The increases in N, P, K and Zn uptake driven by P application were more conspicuous in the sandy and calcareous soils. The results also indicated that the combined application of inorganic and organic P sources surpassed that of either when applied alone on all soil types and salinity levels.

Download Full-text

Occurrence of entomopathogenic nematodes (Rhabditida: Steinernematidae and Heterorhabditidae) in British soils

Parasitology ◽

10.1017/s0031182000061308 ◽

1990 ◽

Vol 100 (2) ◽

pp. 295-302 ◽

Cited By ~ 44

Author(s):

W. M. Homininck ◽

B. R. Briscoe

Keyword(s):

Organic Matter ◽

Soil Type ◽

Entomopathogenic Nematodes ◽

Calcareous Soils ◽

Soil Types ◽

Different Types ◽

Soil Temperatures ◽

Roadside Verges ◽

Different Parts

SUMMARYSoil from 403 hedgerow, roadside verge, woodland, heathland or field sites was assessed for presence of entomopathogenic rhabditid nematodes with aGalleria larva baiting technique. Steinernematids were recovered from 48 % of the sites but only one site yielded Heterorhabditis sp. The species recovered most frequently was Steinernema bibionis (Bovien). Another unidentified Steinernema sp. was also isolated. Prevalence of steinernematids in the different types of habitat formed continuum so that roadside verges harboured them most often while heathland sites yielded them least often. Mean soil temperatures at 5 cm were about 15 °C in fields and verges, 13 °C in hedgerows and heathland and 12 °C in woodland. Prevalence of the nematodes varied in different parts of Britain and was influenced by soil type. They were associated with calcareous soils, especially those with a calcareous subsoil horizon. Soils which are periodically or seasonally water-logged were suitable. Soils enriched by humus and hence high in organic matter frequently harboured the nematodes and some suitable soils had significant clay contents or subsoils high in clay. It appears that the two steinernematids are relatively unspecialized species, occurring in diverse habitats and soil types and are adapted to cooler temperatures.

Download Full-text

Influence of Organic and Inorganic Fertilizers on the Growth, Leaf Yield, Chlorophyll and Protein Contents of Stevia Grown in Different Soil Types

Progressive Agriculture ◽

10.3329/pa.v19i1.16986 ◽

2013 ◽

Vol 19 (1) ◽

pp. 23-31

Author(s):

S Khanom ◽

BK Saha ◽

MT Islam ◽

MAH Chowdhury

Keyword(s):

Calcareous Soils ◽

Poultry Manure ◽

Stevia Rebaudiana ◽

Soil Types ◽

Cow Dung ◽

Chemical Fertilizers ◽

Inorganic Fertilizers ◽

Leaf Yield ◽

Different Types ◽

Organic And Inorganic Fertilizers

A pot experiment was conducted in the open net house of the Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh from January to June, 2007, to study the effect of organic and inorganic fertilizers on the growth, leaf yield, chlorophyll and protein contents of Stevia rebaudiana (Bert.). The experiment was laid out in completely randomized design with three replications having 16 treatment combinations. Four types of soil viz., saline, acidic, calcareous and non-calcareous soils were collected from Khulna, Tangail, Natore and Mymensingh districts of Bangladesh, respectively. Two organic (poultry manure and cow dung) and one inorganic fertilizers @ the recommended dose along with a control were used as treatment factor. The experimental results indicated that different soil types significantly influenced all parameters studied. The highest values of all parameters were obtained from the plant grown in noncalcareous soil which was identical with acidic soil for some parameters. Different types of organic and inorganic fertilizer had also significant influence on all plant parameters. In all cases, the highest values were recorded from the plant fertilized with chemical fertilizers. Poultry manure and cow dung also showed identical results with chemical fertilizer in most cases. Interaction effect of different types of soil and fertilizer showed significant variation for most of the parameters studied except chlorophyll and protein contents. Plants grown in noncalcareous soil fertilized with chemical fertilizers exhibited the best performance in most of the cases. The overall results suggested that stevia can be cultivated in noncalcareous and acidic soils fertilized with chemical fertilizers along with poultry manure favoring the productivity of stevia.DOI: http://dx.doi.org/10.3329/pa.v19i1.16986 Progress. Agric. 19(1): 23 - 31, 2008

Download Full-text

Abrasive wear of polymer/steel gear drives

Progress in Agricultural Engineering Sciences ◽

10.1556/progress.4.2008.1 ◽

2008 ◽

Vol 4 (1) ◽

pp. 1-26

Author(s):

Gábor Kalácska

Keyword(s):

Wear Resistance ◽

Abrasive Wear ◽

Material Selection ◽

Solid Particles ◽

Soil Types ◽

General View ◽

Modern Engineering ◽

Clean Environment ◽

Engineering Polymers ◽

Plastic Gears

Research was performed on the friction, wear and efficiency of plastic gears made of modern engineering polymers and their composites both in a clean environment (adhesive sliding surfaces) and in an environment contaminated with solid particles and dust (abrasive), with no lubrication at all. The purpose is to give a general view about the results of abrasive wear tests including seven soil types as abrasive media. At the first stage of the research silicious sand was applied between the meshing gears and the wear of plastic and steel gears was evaluated and analyzed from the point of different material properties (elongation at break, hardness, yield stress, modulus of elasticity) and its combinations. The different correlations between the experienced wear and material features are also introduced. At the second stage of the project the abrasive sand was replaced with different physical soil types. The abrasive wear of gears is plotted in the function of soil types. The results highlight on the considerable role of physical soil types on abrasive wear resistance and the conclusions contain the detailed wear resistance. The results offer a new tribology database for the operation and maintenance of agricultural machines with the opportunity of a better material selection according to the dominant soil type. This can finally result longer lifetime and higher reliability of wearing plastic/steel parts.

Download Full-text

Effects of heavy metals on soil invertase enzyme activity in different soil types

Land Contamination & Reclamation ◽

10.2462/09670513.941 ◽

2010 ◽

Vol 18 (2) ◽

pp. 175-180

Author(s):

Rajesh K. Verma ◽

Dharam Veer Yadav ◽

Chandra Pal Singh ◽

Archna Suman ◽

Asha Gaur

Keyword(s):

Heavy Metals ◽

Enzyme Activity ◽

Soil Types

Download Full-text

CHARACTERIZATION AND PRODUCTION INFLUENCE OF GEOLOGICAL FACIES IN THE EAGLE FORD

10.30632/t60als-2019_ww ◽

2019 ◽

Author(s):

Bhaskar Sarmah ◽

Nicholas Garrison ◽

Eli Bogle ◽

Katie Ross ◽

Patrick Noon

Keyword(s):

Eagle Ford ◽

Geological Facies

Download Full-text

Status of Food Security in Banten Province, Indonesia

10.31227/osf.io/fcvpm ◽

2019 ◽

Author(s):

Weksi Budiaji

Keyword(s):

Population Dynamics ◽

Food Security ◽

Arable Land ◽

Secondary Data ◽

Disaster Risk ◽

Soil Types ◽

Indicator Variables ◽

Cereal Production ◽

The Status ◽

Vast Area

This paper discusses the status of food security in Banten Province, Indonesia based on regional and city characteristics. Secondary data is used and is analyzed descriptively covering population dynamics, the population living in poverty, cereal production, disaster risk and soil types. Tangerang Region is found to have the largest population with the greatest number of people living in poverty among the regions and cities in Banten Province. Cereal production is dominated by the regions rather than the cities due to their vast area. Regarding arable land, flooding is the most threatening disaster in the major rice producing areas. In order to identify the distributions of regions and cities regarding food security, three indicator variables of food security dimensions are plotted, namely, cereal normative consumption, proportion of the population living in poverty, and proportion of malnourished babies. The three regions of Pandeglang Region, Lebak Region and Serang Region are grouped together in a less secure group.

Download Full-text

EFFECT OF IRRIGATION AND GRASSING TO CHANGE SOME OF THE BIOLOGICAL PROPERTIES OF THE MINING OF BROWN CALCAREOUS SOILS

Agricultural Technologies ◽

10.35599/agritech/01.01.04 ◽

2019 ◽

Vol 1 (1) ◽

pp. 29-32

Author(s):

Ruzimurod B. Boimurodov ◽

Zebinisso Q. Bobokhonova

Keyword(s):

Folic Acid ◽

Humic Acid ◽

Humic Acids ◽

Rapid Growth ◽

Growth And Development ◽

Sharp Increase ◽

Humus Content ◽

Calcareous Soils ◽

Biological Properties ◽

Humus Accumulation

In this article is showing, that the irrigation mountain brown carbonate soils prone methods of irrigation and grassing comes the rapid growth and development of natural vegetation, which leads to intensive humus accumulation. Humus content in the upper layer is increased by 0.98% and a significantly smaller severely eroded. Increasing the amount of humus promotes accumulation mainly humic acids, that conducts to expansion of relations the content of humic acid: The content of folic acid. When grassing of soil traced sharp increase in the number associated with the related and R2 O3 humic acid.

Download Full-text