Browsing by Author "Muya, E. M."
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Item Soil Characterization Using Appropriate Soil Quality Indicators For Enhanced Nutrient Uptake in Rodi Kopany and Muhoroni - KARI-NARL-KSS D80, 1994(Kenya Agricultural Research Institute, 1994) Muya, E. M.; Ekirapa, A. E.; Kenya Agricultural Research Institute - National Agricultural Research LaboratoriesThe aim of the study was to contribute to the research aimed at the increased understanding of the factors influencing nitrogen uptake and use efficiency. The research was conducted as a part of the PhD programme, carried out to develop management options for reducing losses of nutrient through leaching. In this context, the objective of the research was to quantify the effects of fertilizer nitrogen recourses and management practices on N losses through bypass flows. Characterization of soil in terms of its physical and hydraulic properties was carried out since these are the most important soil quality indicators that influence the soil's capacity to function as environmental buffer and filter for air, water and nutrients.Item Soils Of the ICIPE Research Site, Ungoye Station, South Nyanza District : Assessment of the Soils for Land Use Planning, Irrigation Design and Identification of Optimun Cropping Patterns - 1991(I C I P E, 1991) Muya, E. M.; ICIPEChapter 1 contains the introduction, where particular attention should be focused on the purpose of the survey. Chapter 2 contains the previous work in Mbita-point field station, where a summary of the management problems of the soils is given. The survey methods are given in chapter 4. The methods are relevant to the collection of data sui table for the purpose of the survey. In chapter 5, the criteria used for separating the soils into different mapping units and their management implications have been discussed. Understanding of these criteria is necessary for appreciating the soil boundaries and the recommendations on the management of the soils in each mapping unit. Chapter 6 and 7 give the values of soil chemical and physical properties on which the classification and evaluation of soils in each mapping unit are based. Hence these two chapters form the backbone of the report and should be given more emphasis. Chapter 8, on land evaluation, contains the values of all the criteria used in separating the soils and their ratings. By matching the rated requirements of the land use types and the ratings of the soil properties, suitability classes of soils are established. The land use types considered are those which are already established in the survey areas. Chapter 9 contains the conclusions and recommendations. It concludes on both chemical and physical properties of the soils. It indicates also the optimum ranges of these properties. Where these properties fallout of the optimum limits, or where the limiting factors would considerably affect the crop growth, recommendations have been given to adjust the soil conditions to suit the desired use. The limiting factors include: a) high sodium levels in some soil units, with the potential to cause poor physical conditions to the soils, b) Shallow soil depth, especially in the hilly areas, d) low moisture availability in most of the soil units. e) Occurrence of Calcium, Magnesium, and Potassium in inappropriate proportions in some soils.
