The potential of alley cropping in improvement of cultivation systems in the high rainfall areas of Zambia. III. Effects on soil chemical and physical properties

1993 ◽  
Vol 21 (2) ◽  
pp. 117-132 ◽  
Author(s):  
A. Dalland ◽  
P. I. V�je ◽  
R. B. Matthews ◽  
B. R. Singh
Keyword(s):  
Physical Properties ◽  
Alley Cropping ◽  
Cultivation Systems ◽  
High Rainfall

The potential of alley cropping im improvement of cultivation systems in the high rainfall areas of Zambia II. Maize production

1992 ◽  
Vol 17 (3) ◽  
pp. 241-261 ◽  
Author(s):  
R. B. Matthews ◽  
S. Lungu ◽  
J. Volk ◽  
S. T. Holden ◽  
K. Solberg
Keyword(s):  
Alley Cropping ◽  
Maize Production ◽  
Cultivation Systems ◽  
High Rainfall

Nutrient losses from rain-fed bench terraced cultivation systems in high rainfall areas of the mid-hills of Nepal

2007 ◽  
Vol 18 (5) ◽  
pp. 486-499 ◽  
Author(s):  
G. P. Acharya ◽  
M. A. McDonald ◽  
B. P. Tripathi ◽  
R. M. Gardner ◽  
K. J. Mawdesley
Keyword(s):  
Nutrient Losses ◽  
Cultivation Systems ◽  
High Rainfall

scholarly journals Change of physical properties of southern carbonate chernozems at various cultivation systems in Northern Kazakhstan

2016 ◽  
Vol 5 (4) ◽  
pp. 10-13
Author(s):  
Nikolay Ivanovich Vasilchenko ◽  
Grigoriy Aleksandrovich Zvyagin
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Physical Properties ◽  
Size Distribution ◽  
Heavy Particle ◽  
Physical Clay ◽  
Clay Particles ◽  
Cultivation Systems ◽  
Northern Kazakhstan ◽  
Contradictory Data

Contradictory data about impact of the minimum and zero cultivation on physical properties of southern chernozems (Chernozem) of heavy particle size distribution have caused the necessity of their studying on the territory of Akmola region. Researches of physical properties of southern carbonate chernozems were conducted based on comparison of soils physical properties the virgin site with pilot allotments of deep and minimum cultivation of land, direct crops and zero technology. Reduction of content physical clay particles and silt in comparison with the virgin site revealed in the upper layer of 0-10 cm in case of all above-stated handlings. Mechanized conversions cause the activation of profile differentiation with regard to silty fraction. Descending migration from the arable horizon to subarable horizon happens in case of deep cultivation of land. This migration from layer of 0-10 cm to underlying arable layer of 10-26 cm happens in case of minimum and zero cultivation of land. The greatest deterioration in addition density of plougland in a layer of 0-10, 10-20 and 20-30 cm observe in case of the minimum and zero cultivation of land.

Effect of hedgerow species in alley cropping systems on surface soil physical properties of an Oxic Paleustalf in south-western Nigeria

1990 ◽  
Vol 114 (3) ◽  
pp. 301-307 ◽  
Author(s):  
N. R. Hulugalle ◽  
B. T. Kang
Keyword(s):  
Physical Properties ◽  
Size Distribution ◽  
Soil Compaction ◽  
Surface Soil ◽  
Alley Cropping ◽  
Cropping Systems ◽  
Soil Physical Properties ◽  
Water Infiltration ◽  
Southwestern Nigeria ◽  
Hedgerow Species

SUMMARYEffects of hedgerow species on surface soil physical properties were studied in an on-going trial established since 1981 on an Oxic Paleustalf in southwestern Nigeria. The experimental treatments wereLeucaena leucocephala, Gliricidia sepium, Alchornea cordifoliaandAcioa barteriihedgerows planted at 4 m interhedgerow spacings and a control (no hedgerows). Plots were sequentia-ly cropped with maize (Zea mays) and cowpea (Vigna unguiculata). Soil physical properties, i.e. particle size distribution, bulk density, apparent pore size distribution and water infiltration, were monitored during the dry season in January and the main growing season in June 1989. Soil temperature was monitored at approximately monthly intervals from February to June 1989. Soil properties of alleycropped plots were superior to those of the control. Soil compaction was highest in the control and lowest withL. leucocephala. Between the hedgerow species, within-season increases in soil compaction were largest withA. cordifolia. Lowest soil temperatures were observed withL. leucocephalaandA. barterii. Frequency, quantity and quality of prunings produced by the hedgerow species appeared to have a major beneficial effect on soil physical properties.

The Photometric Properties of the Ap Stars

1976 ◽  
Vol 32 ◽  
pp. 365-377 ◽  
Author(s):  
B. Hauck
Keyword(s):  
Physical Properties ◽  
Ap Stars

The Ap stars are numerous - the photometric systems tool It would be very tedious to review in detail all that which is in the literature concerning the photometry of the Ap stars. In my opinion it is necessary to examine the problem of the photometric properties of the Ap stars by considering first of all the possibility of deriving some physical properties for the Ap stars, or of detecting new ones. My talk today is prepared in this spirit. The classification by means of photoelectric photometric systems is at the present time very well established for many systems, such as UBV, uvbyβ, Vilnius, Geneva and DDO systems. Details and methods of classification can be found in Golay (1974) or in the proceedings of the Albany Colloquium edited by Philip and Hayes (1975).

The Infection of Cells by Bullet-Shaped Viruses

1969 ◽  
Vol 27 ◽  
pp. 372-373
Author(s):  
Frederick A. Murphy ◽  
Alyne K. Harrison ◽  
Sylvia G. Whitfield
Keyword(s):  
Electron Microscopy ◽  
Physical Properties ◽  
Host Cell ◽  
Thin Section ◽  
Cultured Cells ◽  
Cell Infection ◽  
Thin Section Electron Microscopy ◽  
Section Electron ◽  
Section Electron Microscopy

The bullet-shaped viruses are currently classified together on the basis of similarities in virion morphology and physical properties. Biologically and ecologically the member viruses are extremely diverse. In searching for further bases for making comparisons of these agents, the nature of host cell infection, both in vivo and in cultured cells, has been explored by thin-section electron microscopy.

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