Simply Obtained Global Radiation, Soil Temperature and SoilMoisture in an Alley Cropping System in Semi-Arid Kenya

Mungai, D.N.; Stigter, C.J.; Coulson, C.L.; Ng’ang’a, J.K.

doi:10.1007/s007040050005

Cited by 13 publications

(8 citation statements)

References 20 publications

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“…The ceptometer was also inverted 1.0 m above the canopy to measure reflected PAR from the canopy-soil scene. Precautions taken and difficulties met with such equipment were as listed by Mungai et al [20].…”

Section: Plant Sampling and Analysismentioning

confidence: 99%

Solar Radiation Interception, Dry Matter Production and Yield among Different Plant Densities of <i>Arachis spp</i>. in Ibadan, Nigeria

Oluwasemire¹,

Odugbenro²

2014

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The production of grain legumes is becoming a popular practice in the humid south western Nigeria. Apart from the decreasing trends observed in rainfall amount and duration as a result of climate change, solar radiation interception also constitutes a limitation to crop production because of persistent cloud cover. A trial was conducted at the University of Ibadan experimental site to determine the effect of different plant densities of Arachis spp. on solar radiation interception, dry matter production and yield in Ibadan, Nigeria with the aim of ascertaining the best practice for groundnut production in the zone. The treatments were three plant spacings (60 cm × 20 cm, 75 cm × 20 cm and 75 cm × 40 cm), and three Arachis varieties (Samnut 10, Samnut 21 and Pintoi) arranged in a split plot, randomized complete block design with Arachis varieties as the main plot while plant densities formed the subplot and replicated three times. Growth parameters (number of leaves, dry leaf weight and dry stem weight) were measured at two weeks interval while yield parameters (number of pods, dry pod weight, dry seed weight and total dry matter) were determined at harvest. Intercepted radiation by plants (PAR) was also taken along with the growth parameters. The highest light interception from 42-105 days after planting (DAP) among the Arachis spp. was recorded by Samnut 10, while at 42-87 DAP, plant density of 75 cm × 20 cm had the highest light interception. Dry matter production increased with light interception and was highest at 105 DAP when light interception was between 55% and 60% for all Arachis varieties and all plant densities. In terms of pod weight and grain yield, Samnut 10 performed better than Samnut 21 and also recorded the highest Radiation Use Efficiency (RUE) for pod, seed and total dry matter. However, Arachis pintoi, a sterile and forage plant with slower growth rate served as a cover crop

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Section: Plant Sampling and Analysismentioning

confidence: 99%

Solar Radiation Interception, Dry Matter Production and Yield among Different Plant Densities of <i>Arachis spp</i>. in Ibadan, Nigeria

Oluwasemire¹,

Odugbenro²

2014

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“…However, as opposed to works devoted to an analysis of the impact of the intensity of solar radiation, air temperature and wind speed on soil temperature (Bednarek 1966, Mungai et al 1998, Keryn et al 2004, the results obtained for the impact of the radiation balance at the horizontal surface on the temperature over the area of the sand dune were rather unsatisfactory. The regression models obtained helped explain the said relation in no more than 30%.…”

Section: Conclusion and A Discussion Of Resultsmentioning

confidence: 82%

“…In addition, the shaping of local thermal relations is significantly impacted by the type of active surface and the frequency of sunny and cloudy days (Paszyński 1999, Olecki 2000, Obrębska-Starklowa 2001. One may single out a number of works that have been devoted to the issue of the influence of solar radiation on soil temperature and attempted to achieve a model presentation of the dependences between soil thermal conditions and the intensity of solar radiation, air temperature and wind speed for areas with varied vegetation growth (Bednarek 1966, Keryn et al 2004, Mungai et al, 1998.…”

Section: Thermal and Humidity Conditions Over A Salient Land Form As mentioning

confidence: 99%

Thermal and Humidity Conditions Over a Salient Land Form as Exemplified by a Coastal Sand Dune at the Łeba Sandbar in the Słowiński National Park

Kolendowicz

Forycka-Ławniczak

2013

Quaestiones Geographicae

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kolenDowicz l., ForyckA-łAwniczAk h., 2013. Thermal and humidity conditions over a salient land form as exemplified by a coastal sand dune at the Łeba Sandbar in the Słowiński National Park. Quaestiones Geographicae 32(3), Bogucki Wydawnictwo Naukowe, Poznań, pp. 15-25. 2 tables, 10 figs. DOI 10.2478/quageo-2013-0026, ISSN 0137-477X.abstract. In July 2011, measurements were taken of selected meteorological elements in the central part of the Łeba Sandbar in the Słowiński National Park. On the basis of the results of measurements performed at five points located on a salient land form in close proximity to the seashore, a thermal and humidity characteristics of this form were determined for a twenty-four hour period. The results of measurements obtained from an automatic weather station located in an open area, near the measurement points on the coastal sand dune, were used as information on the atmospheric conditions predominant in the standard area (flat area covered by grass). The research analysis was performed for the entire measurement period and for days with radiational weather. The authors also determined the dependence between air temperature and humidity values observed over the analysed land form and the values of weather elements measured over the standard area. key worDs: air temperature, relative humidity, correlation, regressive analysis, salient land form, Łeba Sandbar, Słow-iński National Park

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“…During the radiation weather days, the temperature changes are more dynamic and the daily amplitudes at each depth are much higher than on the wet weather days. The higher wind speed during the non-radiation days may be considered as an additional factor reducing the heat transfer to the soil (Mungai et al, 1998). In the pine forest, the differences between the soil temperature during the radiation weather and wet weather are not so signifi cant, however, on the wet weather days, hardly any temperature changes under the surface are observed.…”

Section: Discussionmentioning

confidence: 99%

Daily course of the soil temperature in summer in chosen ecosystems of Słowiński National Park, northern Poland

Bednorz

Kolendowicz

2010

Quaestiones Geographicae

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ABSTRACT. Patterns of the daily changes of the soil temperature in summer at three different ecosystems within the Słowiński National Park were analyzed. Strong correlation between the solar radiation and the soil temperature was found, particularly for the bare sandy surfaces, while the plant and humus cover hampers the solar energy fl ux to the soil. In the same way, correlations between the temperature of soil surface and the air temperature were computed. Finally, logarithmic models for the relationship between the global solar radiation and the soil surface temperature and between the soil surface temperature and the air temperature were constructed.

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Simply Obtained Global Radiation, Soil Temperature and SoilMoisture in an Alley Cropping System in Semi-Arid Kenya

Cited by 13 publications

References 20 publications

Solar Radiation Interception, Dry Matter Production and Yield among Different Plant Densities of <i>Arachis spp</i>. in Ibadan, Nigeria

Solar Radiation Interception, Dry Matter Production and Yield among Different Plant Densities of <i>Arachis spp</i>. in Ibadan, Nigeria

Thermal and Humidity Conditions Over a Salient Land Form as Exemplified by a Coastal Sand Dune at the Łeba Sandbar in the Słowiński National Park

Daily course of the soil temperature in summer in chosen ecosystems of Słowiński National Park, northern Poland

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Simply Obtained Global Radiation, Soil Temperature and SoilMoisture in an Alley Cropping System in Semi-Arid Kenya

Cited by 13 publications

References 20 publications

Solar Radiation Interception, Dry Matter Production and Yield among Different Plant Densities of &lt;i&gt;Arachis spp&lt;/i&gt;. in Ibadan, Nigeria

Solar Radiation Interception, Dry Matter Production and Yield among Different Plant Densities of &lt;i&gt;Arachis spp&lt;/i&gt;. in Ibadan, Nigeria

Thermal and Humidity Conditions Over a Salient Land Form as Exemplified by a Coastal Sand Dune at the Łeba Sandbar in the Słowiński National Park

Daily course of the soil temperature in summer in chosen ecosystems of Słowiński National Park, northern Poland

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Solar Radiation Interception, Dry Matter Production and Yield among Different Plant Densities of <i>Arachis spp</i>. in Ibadan, Nigeria

Solar Radiation Interception, Dry Matter Production and Yield among Different Plant Densities of <i>Arachis spp</i>. in Ibadan, Nigeria