Comparisons of Solar Radiation Interception, Albedo and Net Radiation as Influenced by Row Orientatoins of Crops.

Baten, Md. Abdul; Kon, Hisashi

doi:10.2480/agrmet.53.29

Cited by 12 publications

(14 citation statements)

References 20 publications

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“…There was variation in Rn mainly due to differences in surface conditions and row orientations (Baten and Kon, 1997). Latent heat flux accounted for a large portion of Rn as was expected from the sufficient soil water content.…”

Section: Daytime Energy Balance Relationshipsmentioning

confidence: 89%

“…It has been observed recently that row orientations affect solar radiation interception at row canopy, transmission through the canopy, net radiation above and below the canopy and albedo (Baten and Kon, 1997) Ham et al (1991) conducted an experiment on soil and canopy energy balances of row crop at partial cover and examined soil and canopy energy balance separately using Bowen ratio technique. Ham et al (1991), however, considered only N-S row direction in the study, not E-W direction.…”

Section: Introductionmentioning

confidence: 99%

“…pared to N-S row spaces (Mutsaers, 1980;Baten and Kon, 1997). This causes larger Rns, G and, LES between E-W row spaces than those of N-S rows.…”

mentioning

confidence: 99%

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Comparisons of Moisture and Energy Balance Components as Influenced by Two Row Orientations of Soybean.

Baten

Kon

Matsuoka

1997

J. Agric. Meteorol.

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When a crop is grown in rows, the row direction influences the energy balance and moisture budget of the soil-canopy system of the crop. Attempts were made to compare energy balance and moisture budget of E-W row soybeans with those of N-S rows at partial cover during the summer of 1996. The energy balance and moisture budget were considered for the soil and canopy separately. Daily fluctuations and diurnal patterns of energy and water balance of field, soil and canopy were strongly influenced by roworientations.Average latent heat flux density (LE) observed in N-S row soybean field was 6.6% larger as compared to E-W row soybean field. Average ratios of -LE to net radiation (Rn) were found 0.85 and 0.87 for E-W and N-S rows, respectively. Soil heat flux (G) accounted for 14 to 20% of Rn for E-W rows and 6 to 9% for N-S rows. Soil surface net radiation (Rns) of E-W rows was about 25% larger than that of N-S rows. Latent heat flux from the soil (LES) was about 13% larger in E-W rows as compared to N-S rows. The -LES/Rns ratios often exceeded 1.0 in both the cases. The sensible heat flux from the soil showed a positive trend in both the cases indicating soil surface was absorbing convective heat. The -G/Rns ratios were found 0.41 and 0.26 for E-W and N-S rows, respectively. Average net radiation of E-W row canopy (Rns) was 20% smaller as compared to N-S row canopy. Latent heat flux from the E-W row canopy (LEe) was 19% smaller as compared to N-S row canopy. The -LES/Rns ratios were found 0.80 and 0.79 for E-W and N-S rows, respectively. Sensible heat flux from the canopy showed negative trends in both the cases. Results suggest that only field energy balance measurements would not provide sufficient information on how energy balances of the soil and canopy are partitioned.

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Section: Daytime Energy Balance Relationshipsmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

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Comparisons of Moisture and Energy Balance Components as Influenced by Two Row Orientations of Soybean.

Baten

Kon

Matsuoka

1997

J. Agric. Meteorol.

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“…At low solar elevation angles on 35 o 46″ N latitude, penetration of solar radiation is larger at the soil surface between N-S rows that of E-W rows (Baten and Kon, 1997).…”

Section: Introductionmentioning

confidence: 99%

“…The yield of maize may be increased by regulating the soil temperature and interception of solar radiation through the suitable row orientation. Solar radiation interception, penetration and albedo were affected by row orientations (Baten and Kon, 1997). Lower albedo was found at smaller solar zenith (noon hours) or higher sun elevation because of the trapping of reflected radiation beneath the canopy (Millar, 1959;Graham and King, 1961).…”

Section: Introductionmentioning

confidence: 99%

Radiation Use Efficiency in Different Row Orientation of Maize (Zea mays L.)

Hossain

Rumi

Nahar

et al. 2015

J. Environ. Sci. & Natural Resources

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An experiment was conducted at the Field Laboratory of Department of Environmental Science, Bangladesh Agricultural University, Mymensingh, Bangladesh to evaluate the radiation use efficiency (RUE) in different row orientation of maize, to determine parameters affecting RUE and to make a comparison of results of the study with previous results observed at different location of the world. The dry weight was taken at 7 days interval by destruction of five plants and kept them oven drier at 80 o C for 48 hours and it was expressed as gm 2 . Dry matter accumulation values at different dates of sampling were regressed with the corresponding cumulative intercepted PAR values and the slope of the regression line was then taken as RUE. The efficiency of radiation utilization varies throughout the crop life cycle. Radiation use efficiency (RUE) was positively correlated to leaf area index (LAI), leaf chlorophyll content, extinction coefficient (k), incident radiation and total solar period of crops and negatively correlated to water stress and light reflection. RUE was highest in vegetative stage, where RUE was higher (0.89 gMJ -1 PAR) in N-S row orientation than E-W row orientation (0.75 gMJ -1 PAR), after that RUE decreased gradually in tasseling stage. Again RUE was slightly increased during maturity. RUE of maize was almost similar with the findings of other researchers and it ranged from 0.85 to 1.5 gMJ -1 , it was due to similar plant architecture and stand duration.

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Radiation budget, soil heat flux and latent heat flux at the forest floor in warm, temperate mixed forest

et al. 1998

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Comparisons of Solar Radiation Interception, Albedo and Net Radiation as Influenced by Row Orientatoins of Crops.

Abstract: Field experiments were conducted on soybean (Glycin max L.) in summer and potato (Solanum tuberosum L.) in autumn to evaluate the effect of row orientations of crops on some selected micrometeorological factors during 1994 and 1995.

Cited by 12 publications

References 20 publications

Comparisons of Moisture and Energy Balance Components as Influenced by Two Row Orientations of Soybean.

Comparisons of Moisture and Energy Balance Components as Influenced by Two Row Orientations of Soybean.

Radiation Use Efficiency in Different Row Orientation of Maize (Zea mays L.)

Radiation budget, soil heat flux and latent heat flux at the forest floor in warm, temperate mixed forest

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