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Journal Article 1985

Thermal conductivity, thermal diffusivity, and thermal capacity of some Nigerian soils

Autor: Ghuman, B.S. Lal, R.

Thermal conductivity increased with increasing soil water content. Clayey soils had lower thermal conductivity than sandy soils at all water levels studied. Thermal conductivity ranged from 0.37 to 1.42 for sandy loam, from 0.37 to 1.90 for loam, from 0.38 to 1.71 for sandy clay loam, and from 0....

Enlace original: https://cgspace.cgiar.org/handle/10568/81492

Investigación en Agricultura

SANDY SOILS

THERMAL PROPERTIES

WATER CONTENT

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Ghuman, B.S. , Lal, R. , [Thermal conductivity, thermal diffusivity, and thermal capacity of some Nigerian soils] , Thermal conductivity, thermal diffusivity, and thermal capacity of some Nigerian soils

Journal Article 1981

The influence of sand and gravels on root growth of maize seedlings

Autor: Vine, P.N. Lal, R. Payne, D.

We prepared sand and gravelly sand media in rigid cylinders, with different proportions and sizes of gravels and sands at various water tensions. Cores of forest topsoil were used for comparison. We measured the growth of pregerminated maize seedlings 72 hours after transplanting them into these ...

Enlace original: https://cgspace.cgiar.org/handle/10568/81505

Investigación en Agricultura

GRAVEL

CYLINDERS

SOIL HORIZONS

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Vine, P.N. , Lal, R. , Payne, D. , [The influence of sand and gravels on root growth of maize seedlings] , The influence of sand and gravels on root growth of maize seedlings

Journal Article 1978

Physical properties and moisture retention characteristics of some Nigerian soils

Autor: Lal, R.

Measurements were made of physical characteristics of 119 samples from 23 profiles derived from two parent materials in Nigeria. The laboratory analyses included texture, plasticity and shrinkage characteristics, and a range of soil moisture constants including saturation point and moisture reten...

Enlace original: https://cgspace.cgiar.org/handle/10568/81259

Investigación en Agricultura

CLAY MINERALS

RETENTION CHARACTERISTICS

SOIL MOISTURE

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Lal, R. , [Physical properties and moisture retention characteristics of some Nigerian soils] , Physical properties and moisture retention characteristics of some Nigerian soils

Journal Article 1981-08

Properties of worm casts under secondary tropical forest regrowth

Autor: Vleeschauwer, D. de Lal, R.

We compared the physical and chemical properties of worm casts with the properties of the surface 0 to 10 centimeters of six soils along a toposequence developed on basement complex rocks in southwestern Nigeria. Casts contained less sand and more silt and clay than the surface soil. Bulk density...

Enlace original: https://cgspace.cgiar.org/handle/10568/81260

Investigación en Agricultura

EARTHWORMS

CHEMICAL PROPERTIES

WORM CASTS

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Vleeschauwer, D. de , Lal, R. , [Properties of worm casts under secondary tropical forest regrowth] , Properties of worm casts under secondary tropical forest regrowth

Journal Article 1995

Intercropping oil palm (Elaeis guneensis) with cocoyam (Xanthosoma sagittifolium) on windows and nonwindows in southern Nigeria

Autor: Salako, F.K. Lal, R. Swift, M.J.

Yields of intercropped oil palm (Elaeis guineensis) and cocoyam (Xanthosoma sagittifolium) were assessed at Okomu (6°25'N, 5°12'E), near Benin City, southern Nigeria. Yields were assessed during the fifth and sixth year after the establishment of oil palm. The annual yield of fresh fruit bunches ...

Enlace original: https://cgspace.cgiar.org/handle/10568/101062

Investigación en Agricultura

YIELDS

INTERCROPPING

FRUITS

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Salako, F.K. , Lal, R. , Swift, M.J. , [Intercropping oil palm (Elaeis guneensis) with cocoyam (Xanthosoma sagittifolium) on windows and nonwindows in southern Nigeria] , Intercropping oil palm (Elaeis guneensis) with cocoyam (Xanthosoma sagittifolium) on windows and nonwindows in southern Nigeria

Journal Article 1991

Comparative assessment of several rainfall erosivity indices in southern Nigeria: short communication

Autor: Salako, F.K. Obi, M.E. Lal, R.

Soil erosion, measured in field runoff plots, was correlated with several rainfall erosivity indices. Erosion was measured on field plots established on a Typic Paleudult in southeastern Nigeria. Several erosivity indices were computed from a daily recording rain gauge sited in vicinity of the ru...

Enlace original: https://cgspace.cgiar.org/handle/10568/101709

Investigación en Agricultura

SOIL EROSION

SOIL

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Salako, F.K. , Obi, M.E. , Lal, R. , [Comparative assessment of several rainfall erosivity indices in southern Nigeria: short communication] , Comparative assessment of several rainfall erosivity indices in southern Nigeria: short communication

Journal Article 1990

Effect of five years of notillage and mulch on soil properties and tuber yield of cassava on an acid Ultisol in southeastern Nigeria

Autor: Hulugalle, N.R. Lal, R. Gichuru, M.

The effect of no-tillage and mulch on soil properties and tuber yield of cassava was studied over a five year period on an infertile, acid Ultisol in south-eastern Nigeria. Mulch was applied at a rate of 12 t ha−1 as a split application once at planting and once six months after planting. No chem...

Enlace original: https://cgspace.cgiar.org/handle/10568/101842

Investigación en Agricultura

MULCHES

CASSAVA

TILLAGE

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Hulugalle, N.R. , Lal, R. , Gichuru, M. , [Effect of five years of notillage and mulch on soil properties and tuber yield of cassava on an acid Ultisol in southeastern Nigeria] , Effect of five years of notillage and mulch on soil properties and tuber yield of cassava on an acid Ultisol in southeastern Nigeria

Journal Article 1990

Nutrient addition into soil by leaves of Cassia siemea and Gliricidia sepium growth on an alfisol in southern Nigeria

Autor: Ghuman, B.S. Lal, R.

Enlace original: https://cgspace.cgiar.org/handle/10568/101855

Investigación en Agricultura

NUTRIENTS

CASSIA SIAMEA

GLIRICIDIA SEPIUM

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Ghuman, B.S. , Lal, R. , [Nutrient addition into soil by leaves of Cassia siemea and Gliricidia sepium growth on an alfisol in southern Nigeria] , Nutrient addition into soil by leaves of Cassia siemea and Gliricidia sepium growth on an alfisol in southern Nigeria

Journal Article 1987-05-29

Managing the soils of sub-Saharan Africa

Autor: Lal, R.

Many constraints to intensive food-crop production in tropical Africa are related to tropical soils. Improved technologies are available for different ecological regions. Important technological innovations include manual land clearing, mulch farming, conservation tillage and tied- ridges, agrofo...

Enlace original: https://cgspace.cgiar.org/handle/10568/81149

Investigación en Agricultura

FOOD CROP

ECOLOGICAL REGIONS

SOIL AND WATER RESOURCES

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Lal, R. , [Managing the soils of sub-Saharan Africa] , Managing the soils of sub-Saharan Africa

Journal Article 1979

Concentration and size of gravel in relation to neutron miosture and density probe calibration

Autor: Lal, R.

The effects of four gravel concentrations (0, 20, 40, and 60 percent by weight) and three gravel size fractions (4-8 mm, 8-15 mm, and 15-40 mm) on the calibration of a neutron moisture meter and density probe was investigated for a beach sand and a clayey tropical Alfisol (Oxic Paleustalf). The s...

Enlace original: https://cgspace.cgiar.org/handle/10568/81152

Investigación en Agricultura

GRAVEL CONCENTRATIONS

GRAVEL SIZE

SOIL

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Lal, R. , [Concentration and size of gravel in relation to neutron miosture and density probe calibration] , Concentration and size of gravel in relation to neutron miosture and density probe calibration

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