Journal Articles: Recent submissions
Now showing items 4941-4960 of 29992
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Changes in Soil Chemical Properties in Response to Application of Phosphorus Sources in Legume Sorghum Cropping Systems
(2014)Field experiments to evaluate effect of phosphorus (P) fertilizers and integration of legumes in sorghum cropping systems on soil pH, available nitrogen (N) and P, were conducted in Njoro Kenya during the short (SRS) and ... -
The potential of underutilized phosphate rocks for soil Fertility replenishment in Africa:case studies in Western Kenya
(African Crop Science Society & Minia University, 2007)Most sub-Saharan African countries continue to have slow development rates, mainly resulting from food insecurity, poverty and poor health of the majority of the populations. With regard to food insecurity, soil ... -
1-Power normal and 1-Power quasinormal operators
(2014)In this paper, 1-Power normal and 1-Power quasinormal operators are introduced. Amongst other results, it is proved that, 1-Power normal operators have translation invariant property and that, if any operator and its adjoint ... -
Berger-Shaw inequalityfor n-Power quasinormal and w-hyponormal operators
(2014)Every reducible operator can be decomposed into normal and completely non-normal operators. Unfortunately, there are several non normal operators which are irreducible. However, every operator whose self-commutator is ... -
An Interplay Between n-Power quasinormal and w-Hyponormal operators
(2014)In this monograph, via Aluthge transformations, it is proved that every n-Power normal operator is normaloid and through paranormality, w-hyponormal operators are shown to be indepedent from n-Power normal, hence from ... -
Drought monitoring in Kenya: A case of Tana River County
(2014-07)Standardized Precipitation Index (SPI) is used to assess past, present and projected drought conditions while Mann Kendall trend test and coefficient of variability is used for trend analysis. Observed data from National ... -
Anaerobic digestion of sewage wastewaters with sludge and rumen fluid
(2014-08)Anaerobic digestion was conducrcd at mesophilic (31'e) Gild thermophilic (S5"C) conditions using sewage wasteWaTers as the substrate and sludge and/or rum ell[luid as (he inoculum; with a view to optimis» biogcs production. ... -
Effect of Ga Incorporation and Film Thickness on the Optical Properties of as-Deposited Amorphous GaxSel-x Thin Films
(2014)Abstract: Flash evaporated amorphous Ga.Se i., (x = 0, I, 2, 3, and 4 atomic %) on glass substrates have bee. investigated within a 500nm-I500nm spectral range. Film thicknesses explored were; 200±IOnm, 265±IOnflJ. 330±IOnm, ... -
Management of soil fertility in western Kenya: Experience working with smallholder farmers
(African Crop Science Society, 2005)Crop yields in sub-Saharan Africa are low and unsustainable, reflecting prolonged food insecurity in the region. In Western Kenya, maize (staple) yields at small scale farm level rarely exceed 0.5 t/ ha/ season. These low ... -
Evaluating MERIS-Based Aquatic Vegetation Mapping in Lake Victoria
(2014)Delineation of aquatic plants and estimation of its surface extent are crucial to the efficient control of its proliferation, and this information can be derived accurately with fine resolution remote sensing products. ... -
On reflectionless equi-transmitting matrices
(2014)Reflectionless equi-transmit.ting unitary matrices are studied in connection to matching conditions in quantum graphs. All possible such matrices of size G are described explicitly. It is shown that such matrices form 30 ... -
Use of wheat straw, soybean trash and nitrogen fertiliser for maize production in the Kenyan highlands
(1999)Making best use of available crop residues is an important component of integrated nutrient management. A field study was conducted over two seasons (1997 and 1998) in Kenya that examined use of wheat straw, soybean trash ... -
Indigenous methods for bruchid beetle (Coleoptera: Bruchidae) control in stored beans (Phaseolus vulgaris L.)
(1998)Four bruchid beetle control methods using: corn oil, wood ash, sunning and sieving (S&S) and insecticide (1.6% pirimiphos-methyl/ 0.3% permethrin ), were evaluated to determine their efficacy, effect on germination, seedling ... -
Using spectral subspaces to improve infrared spectroscopy prediction of soil properties
(2015)We propose a method for improving soil property predictions using local calibration models trained on datasets in spectral subspaces rather that in a global space. Previous studies have shown that local calibrations based ... -
Determination of damage threshold of cassava green mite (Acari: Tetranychidae) on different cassava varieties for pest management
(2014)Density threshold has been least considered in efforts to control cassava green mite (CGM) of the Mononychellus species. Nine cassava varieties of varied cyanogenic contents were evaluated for CGM density threshold. Mite ... -
A Simplified Formalism for Computing Growth Rates for Perturbations in Standard Cosmology
(2015)We present a simplified formalism for computing growth rates for perturbations within standard cosmology. We show that converting the perturbation evolution equations into ordinary differen1ia1 equations in terms of ...
