scholarly journals A Simple Model to Predict the Culm Length in Rice Cultivar "Koshihikari" Using Temperature, Solar Radiation, Plant Length, Tiller Number, Leaf Color Index

2019 ◽  
Vol 88 (2) ◽  
pp. 132-142
Author(s):  
Atsushi Mochizuki ◽  
Yasuo Tsuruoka ◽  
Hiroshi Nakagawa
Keyword(s):  
Simple Model ◽  
Solar Radiation ◽  
Color Index ◽  
Rice Cultivar ◽  
Tiller Number ◽  
Leaf Color ◽  
Culm Length ◽  
Plant Length

scholarly journals Effect of Ammonium Sulfate Application Levels on the Growth and Yield of IR-28 Rice

2021 ◽  
Vol 9 (3) ◽  
Author(s):  
Claurence Nkumbe Ndille ◽  
Michael Amos Ballah ◽  
Shafiqullah Safi ◽  
Isaac Mupeta
Keyword(s):  
Ammonium Sulfate ◽  
Nitrogen Fertilizer ◽  
Yield Components ◽  
Tiller Number ◽  
Spikelet Fertility ◽  
Significant Difference ◽  
Spikelets Per Panicle ◽  
Four Levels ◽  
Sulfate Application ◽  
Plant Length

The study was conducted in JICA Tsukuba experimental rice field RE-2 from April 2018 to September 2018, to determine the effect of different levels of nitrogen fertilizer (Ammonium sulfate) application, on the growth and the yield of IR-28 rice. Four levels of nitrogen fertilizer were applied; 0kg.ha-1 (N0), 40kg.ha-1(N40), 60kg.ha-1(N60) and 80kg.ha-1(N80). For each of the four levels, part of the fertilizer was applied as basal dressing prior to transplanting, and the rest was applied as top-dressing at the panicle initiation stage. The experimental design was a Randomized Complete Block Design (RCBD) with four treatments and three replications. The plant length, the tiller number and the leaf colour were measured for growth data. The number of panicles per m2, the number of spikelets per panicle, the spikelet fertility rate, the 1000 grains weight, and the calculated yield were determined for yield components assessment. The plant length and the tiller number were significantly higher in N80 and N60 compared to N40 and N0, and N80 showed the highest values. There was no significant difference among the four nitrogen levels in terms of the number of panicles per m2 and the number of spikelets per panicle. The spikelet fertility rate and the 1000 grains weight were significantly higher in N80, N60 and N40 compared to N0, and no significant difference was observed among the three. Calculated yield values were higher in N80 (5.74 tons.ha-1) and N60 (5.38 tons.ha-1) compared to N40(4.88 tons.ha-1) and N0 (4.36 tons.ha-1), but there were no significant differences among the four treatments (5% Level of HSD). These results suggest that a high yield of rice can be achieved through the application of high amounts of nitrogen fertilizers. N60 nitrogen level can be recommended for optimum yield of IR-28. Although N80 showed higher yield and yield components, N60 is the best and the most economical nitrogen level required for optimum yield of IR-28.

Influence of Cultivar and Growth Stage on Pigments and Processing Factors on Betacyanins in Red Amaranth (Amaranthus tricolor L.)

2009 ◽  
Vol 15 (3) ◽  
pp. 259-265 ◽  
Author(s):  
Laila Khandaker ◽  
Md. Babar Ali ◽  
Shinya Oba
Keyword(s):  
Food Processing ◽  
Color Index ◽  
Plant Age ◽  
Prolonged Storage ◽  
Leaf Color ◽  
Amaranthus Tricolor ◽  
Leaf Formation ◽  
Highly Correlated ◽  
The Stability ◽  
Processing Factors

Seven cultivars of red amaranth (Amaranthus tricolor L.) with different leaf color were evaluated for their betacyanin and chlorophyll content at two stages of development. The effects of food processing factors such as thermal treatment, light, H2O 2, and prolonged storage on betacyanin extracts were also examined. Betacyanin concentrations were highly correlated with the leaf color index and the cultivars (Rocto joba, BARI-1, and Altopati) with better color index tended to be associated with high betacyanin. Within a shoot canopy, the apical leaves accumulated higher betacyanin than those of middle and basal leaves. While the highest concentrations of chlorophyll were found in BARI-1, however Red queen had the lowest concentrations. Color index of leaves and betacyanin concentrations were increased and chlorophyll concentrations were decreased with the plant age, which indicate that change of these colorant pigment concentrations with plant age enhance the red leaf formation in red amaranth. Low temperature, darkness, and free or low oxidants maintained the stability of betacyanin concentrations of red amaranth; prolonged storage degraded the betacyanin. Variable factors such as the cultivar of red amaranth, its degree of maturity, and the food processing factors have been shown to have a quantitatively important influence on betacyanin yields and preservation.

scholarly journals The Dynamics of NEO Binary Asteroids

2006 ◽  
Vol 2 (S236) ◽  
pp. 177-190
Author(s):  
D.J. Scheeres
Keyword(s):  
Simple Model ◽  
Binary System ◽  
Solar Radiation ◽  
Radiation Pressure ◽  
Solar Radiation Pressure ◽  
Binary Asteroids ◽  
Near Earth Objects ◽  
Solar Gravity

AbstractThe dynamics of binary Near-Earth objects (NEO) are discussed and a simple model for the study of their dynamics is introduced. Main results on the motion and stability of binary asteroids are reviewed. The effect of perturbations external to the binary system, including solar gravity, solar radiation pressure, and planetary gravity, are considered.

scholarly journals New Method for Calculating the Heating of the Conductor

Energies ◽  
2019 ◽  
Vol 12 (14) ◽  
pp. 2769
Author(s):  
Voršič ◽  
Maruša ◽  
Pihler
Keyword(s):  
Heat Transfer ◽  
Tensile Strength ◽  
Steady State ◽  
Natural Convection ◽  
Simple Model ◽  
Solar Radiation ◽  
Balance Of Power ◽  
Stable Operation ◽  
The Core ◽  
Steel Core

The paper describes the core heating of ACSR (aluminum conductor steel—reinforced) conductor in stable operation under different environmental conditions. The calculations are greatly simplified in a steady state—we can calculate on a balance of power instead of a balance of energies. At a known surface, the temperature of the conductor due to solar radiation, natural convection, and joules heating as well as the temperature of the steel core were calculated, which is relevant for the tensile strength of the rope. Measurements of the surface of the conductor and the core rejected a simple model of heat transfer—it is also necessary to take into account empty air spaces between the wires of a rope. On the basis of measurements, a new model has given satisfactory compliance with the measured values.

Leaf color is fine-tuned on the solar spectra to avoid strand direct solar radiation

2016 ◽  
Vol 129 (4) ◽  
pp. 615-624 ◽  
Author(s):  
Atsushi Kume ◽  
Tomoko Akitsu ◽  
Kenlo Nishida Nasahara
Keyword(s):  
Solar Radiation ◽  
Direct Solar Radiation ◽  
Leaf Color
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