A comparison of the plantlets growth in two different humidity level shown that the low humidity environment enhance the evaporation of plantlets compared to the high humidity environment. The humidity of the internal air in a culture vessel is also affected by the irradiance as well as the water content of the medium. The humidity also can be affected due to the presence of light. It can be seen that during light period, the air humidity is decreased and the tension of the medium increase while during dark period, the air humidity is a bit high causing the tension of the medium to increase causing more water to flow out from the medium and disturb the growth of the plantlets. The relationship between the relative air humidity and evaporation can be
This is different from the Andes varieties because all the panicles mature at different times. Another reason this crop has grown to become more popular is that the crop is healthy as a food source but also gluten-free. The crop can also grow in many extreme climates whether warm or cold the plant adapts to the climate it is growing in. Overall, this crop is a great alternative crop because it provides humans with the nutrients we
The macroinvertebrate community responds to substrate parameters such as particle size and embeddedness, which directly affect benthic habitat. These findings reveal that the macroinvertebrates are responding to sedimentation (Spindler). Riparian vegetation is an important component of the river. It is significant in contributing shade for the river against sunlight that resulted in maintaining the water temperature that is suitable for organisms’ survival. The roots of the riparian vegetation are also significant for it sips most of the nutrient pollutants dissolved in groundwater before reaching the river.
Fenestration and its variable components (a) Size, position and orientation of windows affect sun penetration i.e. solar heat gain, but also affect ventilation, especially where cross ventilation is desirable. (b) Glass: single, double, multiple and glass quality: special glasses (heat absorbing or heat reflecting glasses) may be used to improve an otherwise bad situation, by reducing the solar heat gain. (c) Closing mechanism: fixed glass, louvers, opening sashes, type of sashes used (Fig.1) (d) Internal blinds and curtains can slightly reduce the solar heat gain, by reducing the beam (direct) radiation, but they become heated and will re-emit that heat, thus causing convective gains. (e) External shading devices are the most positive way of controlling solar heat gain.
Soil pH governs the availability of many elements that are essential for, or toxic to, plant growth. It is a determination of the hydrogen (H+) activity (effective concentration) in solution and it also measures the intensity of acidity or alkalinity in a sample of soil. (K.Peverill, et all, 1999) Plants often differ in their response when grown on soils with extreme pH value. 2.3 Mineral nutrition in
Diversity, distribution and systematics Temperature is one of the most important ecological factors that affect microbial activities and their distribution (Johri et al., 1999; Maheshwari et al., 2000). Microbial species exist in a great variety of environments with extremes of temperature, pH, chemical composition and pressure. This is due to their genetic and/or physiological adaptations (Cooney and Emerson, 1964; Johri et al., 1999; Maheshwari et al., 2000). Of the three domains of life, most of the thermophilic microbial species which have been described belong to Archaea and Eubacteria (Barns et al., 1996). The maximum temperature limit for Eukaryota has been recorded as 62ºC (Tansey and Brock, 1972).
Air refers to gasses that also move through soil spores. Air and water occupy about 50% of the soil volume. 4. Organic matter: organic matter component of soil include both the un decomposed plant and animal remains and the black colour substance known as humus 5. Living organisms: Soil organisms participating in soil development range from microscopic (e.g bacteria) to large animals (including man).
INTRODUCTION Bio-climatic architecture is described as the simple theory of building dependent on various factors such as, the location of the site, the micro-climate of the place in which you intend to build. This is dictated on the climatic zone in which your site lies. The four major climatic zones are: tropical, arid, temperate and cool. The method of building design in a specific climate zone involves first analyzing each of the zone’s climatic characteristics, followed by their influences on the built form, then by more research into the use of external wall as an interactive filter. Not forgetting the traditional built forms characteristics needs to be examined (Yeang 1994:139).
Other forms of precipitation are freezing rain, sleet or ice pellets, snowfall, and hail. The amount and regularity of rainfall vary with location and climate types and affect the dominance of certain types of vegetation as well as crop growth and yield. • Light Light is a climatic factor that is essential in the production of chlorophyll and in photosynthesis, the process by which plants manufacture food in the form of sugar (carbohydrate). Other plant processes that are enhanced or inhibited by this climatic factor include stomata movement, phototropism, photo morphogenesis, translocation, mineral absorption, and abscission. • Temperature The degree of hotness or coldness of a substance is called temperature.
Minimize the pollution: It reduces air, sound and even thermal pollution. Forest has many plants and trees. The air on the earth moves from one place to another. Similarly the gas and air pollution diffuses to all over the air and get less severe. Presence of forest nearby helps these pollutants to be absorbed from the air.