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EFFECT OF AZADIRACHTIN ON POTATO VIRUS YN RETENTION IN GREEN PEACH APHID Myzus persicae (Sulz.)
Myzus persicae PVYN retention azadirachtin
2009/3/30
In laboratory studies there was observed no positive effect of azadirachtin on PVYN retention in Myzus persicae (Sulz.) which, having contracted the pathogen, were starved and next they were feeding ...
Spatial characteristics of potentially useful retention in Polish arable soils
Polish arable soils potentially useful retention
2008/12/2
The spatial characteristics of potentially useful retention (PUR) in Polish arable soils have been presented. It was found that the values ranged from 2.1 to 27.2% vol. in relation to soil units. The ...
Attempt of water retention characteristcs estimation as pedotransfer function for organic soils
organic soils pedotransfer functions water retention
2008/11/26
This paper presents the results of statistical-physical modelling (pedotransfer function) relating soil water content at defined values of soil water potential to selected physical and chemical parame...
Agrophysical methods of water retention control in the rural areas
agrophvsical methods flood control
2008/11/26
Main topics and various remarks to resolve flood problems in Central Europe and agrophysical Lhods of water retention control in rural areas is shown.
Comparison of correlation models for the estimation of the water retention characteristics of soil
soil water retention correlation models
2008/11/21
This paper presents a comparison of three models for the estimation of soil water retention characteristics. They are based on the correlation between soil water content values at chosen values of so...
Comparison of correlation models for the estimation of the water retention characteristics of soil
soil water retention correlation models
2008/11/21
This paper presents a comparison of three models for the estimation of soil water retention characteristics. They are based on the correlation between soil water content values at chosen values of so...
Evaluation of water retention on the surface of embankment constructedfrom the carboniferous waste products
carboniferous waste products water retention saturated hydraulic conductivity coefficient
2008/11/21
The experiments were realized on 4 variants: A soil, covered with a (0-2 cm) layer of organic-mineral material; B soil, covered with a (0-2 cm) layer of organic-mineral material with biogel (dose 1); ...
Effect of solid phase wettability on water transport and retention in peat enriched soil affected by freezing/thawing
wettability water retention freezing/thawing soil
2008/11/20
Samples of A and B horizons of arable loessial soil, with and without the addition of c.a. 9% of peat and subjected to six freezing/thawing cycles, were studied. Surface free energies and water contac...
Predicting the soil water retention curve from readily-a vail able data obtained during soil surveys
model pedotransfer functions van Genuchten equation soil water retention
2008/11/13
Averages and coefficients of variation of the parameters of the van Genuchten equation were estimated, in relation to a large dataset, for soil particle-size classes differentiated according to the pr...
Reconstruction of retention capacity of small river basins as a protection measure against floods and droughts
small river basins water retention floods draughts
2008/11/12
One of the methods to improve water balance is development of the so called small retention consists mainly in the increase of the potential retention abilities of small basins. The studies and approx...
Relationship between van Genuchten’s parameters of the retention curve equationand physical properties of soil solid phase
water retention curve van Genuchten’s parameters pedotransfer functions
2008/11/12
Van Genuchten parameters were determined for 24 Phaeozems and 54 Gleysols samples taken from surface, subsurface and subsoil horizons. No evident dependences between van Genuchten’s parameters and th...
Water retention characteristics of peat and sand mixtures
peat - sand mixtures water retention
2008/11/10
The water retention characteristics of peat, sand and their mixtures has been investigated. The results obtained showed that the hydro-physical properties of the mixtures in- vestigated depended on th...
Using of geocomposite with superabsorbent synthetic polymers as water retention element in vegetative layers
geocomposite superabsorbent anti-erosion protection water retention
2008/11/10
Many earth structures are protected against erosion with grass cover. ‘Green’ protection is often applied in difficult conditions of water deficit - on slopes, over high per- meable layers, over drain...