Impact Of Rice Research Articles

Characterization, classification, and suitability evaluation of soils formed in fluvial deposits within eastern part of Kogi State in Nigeria for rice and maize production

The impact of rice and maize production on food security in Nigeria cannot be over-emphasized. The aim of this research was to characterize, classify and evaluate the suitability of soils formed in fluvial deposits within eastern part of Kogi State in Nigeria for rice and maize production. This was supported by the fact that the knowledge of the characteristics and soil groups of fluvial deposits in soils is an integral part in soil suitability evaluation as well as management. Four (4) soil profile pits were sunk within the research area. The pedonswere located within the 19a mapping unit of the soil map of Nigeria which has the fluvial deposits. Pedons were adequately described as soil samples were collected from pedogenic horizons, and preserved in well-labelled polyethylene bags, transported to the Laboratory for analyses. The findings revealed that the soils were characterized by dominant gray (10YR4/1) and dark reddish gray (10R4/1) in the surface soils and dominance of various shades of gray in the subsurface soils. Most of the soil structures were single-grained and subangular blocky at the surface and subsurface soils respectively. The soil texture was sandy clay loam and sandy loam in the A horizons. The soil reaction showed mean values of 6.1 and 5.5 at the surface and subsurface horizons with base saturation highest (91%) at C1 horizon of 19a3 pedon. The pedons were classified as inceptisols, and were currently not suitable (N1) for rice cultivation but marginally suitable (S3) for maize cultivation.

The Impact of Oil Price Shock on Rice Prices in Asean Area: A Framework

The conditions of the world rice market and the domestic rice market are unstable markets and are heavily influenced by external factors. There are many factors that can affect the price of unhulled rice and rice at the farm level, one of which is the effect of the integration of world and domestic rice markets. Thus the events or shocks that occur on the world market will affect the conditions of the domestic rice market. External factors affecting rice trade include petroleum. Oil as one of the factors influencing changes in the demand and supply of various traded commodities because of its vital role. Oil price fluctuations are often used as a benchmark for the stability of world trade conditions.Research specifically on the impact of rice was carried out by Chintia (2013) which states that oil price shocks cause domestic rice prices to have a fluctuating pattern and have an increasing trend, but domestic rice prices always fluctuate on trend. An attractive characteristic of the domestic rice price is that it is always above the world rice price. This occurs because rice is a commodity that has many interventions by the government in maintaining domestic rice price stability and maintaining the purchasing power of the public as consumers and farmers as producers. In the short term, the domestic rice price is influenced by the domestic rice price itself, the imported rice price, and the world crude oil price. In the long run, the domestic rice price is influenced by world rice prices, imported rice prices, and rice production. This paper will discuss the framework for the impact of oil shocks on rice prices in the ASEAN region. This framework is the basis for the stages in conducting further research Keywords: Impact, Rice, oll price, Rice, ASEAN

Estimating price impact via deep reinforcement learning

AbstractPrice impact is the adverse change of the asset price against trader's action. As a crucial part of the indirect trading cost, price impact has attracted increasing attention in both econometric and data science literature. In this paper, we draw upon both strands of the literature and develop a deep neural network enhanced recursive (DeRecv) model to estimate temporary and permanent price impact of an order or trade. The temporary price impact is calculated as the sum of the expected immediate impact at each time point after taking action in an ad hoc market condition. The permanent price impact is defined as a new permanent level at which the information of the incoming order is entirely absorbed by the market. Through the experimental evaluation based on data from 10 stocks at NASDAQ and Shanghai Stock Exchange, we show that the proposed DeRecv model is better than the reinforcement learning model and the traditional vector autoregressive model.

Tracing the Resilience and Revitalisation of Historic Taro Production in Waipi`o Valley, Hawai`i

The resilience and revitalisation of taro/kalo agriculture in the Hawaiian contact period is analysed in Waipi‘o Valley, on the Big Island of Hawai‘i. Historic work has demonstrated the effects of colonial contact on the people of Waipi‘o. Documents from the Māhele period, census information and missionary records are combined to paint a picture of how life unfolded in Waipi‘o Valley over time. What is alluded to, and yet unexplored, is the changing production system and an overall trend of decreasing and fluctuating wetland taro production, where traditional cultivation is transformed by the introduction of rice farming. Later in time this too fades out, when taro again becomes dominant. Interestingly, wetland taro cultivation in Waipi‘o is still practiced today, with interest in revitalising the capacity of a once intensively cultivated valley. Here, the impact of rice, and other crop introductions, is explored in terms of revitalising these wetland traditions. This was done by generating “snapshots” of the landscape through time. Information detailing traditional owners, plot locations and pondfields metrics were derived from digitised historic survey maps, and modern remote sensing techniques such as high resolution LiDAR (Light detection and ranging) imagery. Combining this information not only catalogued the historic trend of declining wetland irrigation, but directly illustrates the influence of past agricultural choices on modern wetland revitalisation agendas.

Impact of aerobic rice-leafy vegetables intercropping systems on weed management

Field experiments were carried out in summer 2017 and 2018 at Zonal Agricultural Research Station (ZARS), University of Agricultural Sciences, GKVK, Bengaluru, India on red sandy loam soil. The main objective was to evaluate the impact of rice grown in aerobic conditions intercropped with leafy vegetables on weed management, wherein the sole rice and intercrops of four leafy vegetables: palak (Spinacia oleracea L.), coriander (Coriandrum sativum L.), amaranth (Amaranthus spp L.), methi (Trigonella foenum-graecum L.) were designed in randomized complete block design (RCBD) of 9 treatments replicated four times. The results revealed that the greater the crop biomass, the higher the weed suppression achieved. Sole rice was densely populated by weeds and also had higher weed biomass compared to the intercrops. However, intercrops suppressed efficiently the weeds, increased growth and rice equivalent yield over the sole rice crop. The intercropping systems with leafy palak (spinach) were the most suppressive of weeds. The rice + leafy vegetable palak recorded significantly lower weed density (138.4 no. m-²), dry weight at harvest (148.04 g m-²), higher rice grain, rice straw and palak leaf yield (7651; 9687 and 25508 kg ha-¹, respectively) and higher net monetary return (₹ 156269 ha-¹) over the sole rice.

INTEGRASI PASAR BERAS INDONESIA DENGAN PASAR BERAS INTERNASIONAL

The food crisis that was triggered by climate change has swept the world lately. Climate change is affecting the pattern of the world that led to changes in the pattern of agricultural production as well. Changes in the pattern of production results in world food production schedule was delayed, and along with these changes, many countries export so that world food prices increase. Rising world food prices starting from US and then spread in the other parts of the world, including Indonesia. However, it is unknown how big relatedness of International food prices changes with food prices in Indonesia. This paper aims to analyze the connectedness between domestic rice market with international market, how long shock in international rice impact on the domestic market and to analyze interlinkage in domestic primary rice market. Using data rice price in indonesia and international rice price of FAO, writer found that market rice integrated both in domestic and foreign, so the fluctuations in both markets would affect each other Keywords: Food Crisis, Production Pattern, Domestic and International Market Integration

“The Blood Never Stops Flowing and the Party Never Ends”: The Originals and the Afterlife of New Orleans as a Vampire City

“The Blood Never Stops Flowing and the Party Never Ends”: The Originals and the Afterlife of New Orleans as a Vampire City

Cooling and Stir-Frying did not Reduce the Glycemic Impact of Rice

Cooling and Stir-Frying did not Reduce the Glycemic Impact of Rice

Exposure assessment of arsenic speciation in different rice types depending on the cooking mode

Total (Ast), inorganic arsenic (Asi=As(III)+As(V)) and dimethylarsonic acid (DMA) were determined in 37 commercial rice samples collected in France. Ast was measured by inductively coupled plasma-mass spectrometry (ICP-MS) whereas anion-exchange chromatography – ICP-MS was used for Asi and DMA determination. Ast in raw rice varied from 0.041 to 0.535mgkg−1 whereas Asi varied from 0.025mgkg−1 (polished Basmati rice) up to 0.471mgkg−1 (organic rice duo). The daily intake and associated health risk for different population groups as a function of age and gender was also assessed. The intake varied between 0.002 and 0.184μgkg−1 body weight for Ast and 0.002 and 0.153μgkg−1 body weight for Asi, which do not pose a chronic toxicity risk. Organic wholegrain rice may entail a risk for children in the case of sole consumption at the expense of polished rice. The impact of rice cooking/boiling in terms of the overall toxicological risk related to As species was also investigated. Pre-rinsing and boiling the raw rice by using an excess of water is the most efficient mode to obtain a significant Asi removal and further reduction of the toxicological risk for children, particularly for white rice varieties.

Variable impact of rice (Oryza sativa) on soil metal reduction and availability of pore water Fe2+ and Mn2+ throughout the growth period

ABSTRACTFlooding of wetland or agricultural soils can result in substantial alteration of the pore water trace metal profiles and potentially also influence the bioavailability of other trace elements adsorbed to the insoluble oxides. Experimental microcosms were used to quantify the impact of rice (Oryza sativa) plants across an entire growing cycle on the concentrations of Mn2+ and Fe2+ in two soil types (red sodosol and grey vertosol). Two water management treatments were included: a standard flooded treatment and a saturated treatment (−3 kPa). Soil pore water profiles were established from samples collected at four sampling depths (2.5, 7.5, 15 and 25 cm) on 50 occasions. Fe2+ and Mn2+ concentrations were higher in flooded soil than in saturated soil and greatest at a depth of 7.5 cm. The presence of rice plants increased Mn2+ concentrations in flooded soils, but tended to decrease Mn2+ concentrations in saturated soils. The influence of rice plants on Fe2+ concentrations was greatest at a depth of 7.5 cm. Changes in soil pore water Fe2+ and Mn2+ concentrations due to the presence of rice plants were correlated with flowering and reproduction.

On the Impact of Rice and Rayleigh Channel Characterization on VoIP Services: a QoE Approach

During the recent years, Voice over IP (VoIP) has experienced a wide growth due to, among other factors, the expansion of wireless networks. However, voice transmission over wireless systems has some inherent challenges to beat because of the particular characteristics of the wireless transmission channel. In this work we employ two statistical propagation models, namely, Rice and Rayleigh, in order to evaluate the performance of a VoIP wireless transmission system under different fading environments. We compare the results obtained in these hostile scenarios with those attained in free space situations, in which the physical layer is only characterized by signal propagation losses. With the aim of carrying out this evaluation from a Quality of user Experience (QoE) perspective, we employ the E-model, which has become one of the most relevant planning and quality estimation tools. Concretely, we assess, via computer simulation, the effect of fading over system coverage range and VoIP capacity, using different codecs and different bandwidths on an IEEE 802.11 system. From the obtained results, we observe that VoIP communications suffer a noticeable drop on the achieved QoE in scenarios affected by fading channels. Moreover, the network coverage area and the VoIP system capacity are also negatively impacted by the effect of fading, showing reductions of up to 200 m of distance and 3 VoIP calls, in settings with high levels of fading compared with free space situations.

Effects of Bt transgenic rice line on stripe stem borer, Chilo suppressalis and its consequences on egg parasitoid, Trichogramma brassicae Bezdenko (Hymenoptera: Trichogrammatidae) in the laboratory

Interactions among Chilo suppressalis (Walker), its larval parasitoid Trichogramma brassicae Bezdenko and insect-resistant transgenic rice lines were evaluated under laboratory conditions. The results showed that all neonates and second larvae of stem borer were dead regardless of being fed rotationally or permanently on Bt rice, but 18% and 28% of the third and fourth instar larvae could complete development and turned to adults, respectively, when fed rotationally. In the second year of project, third instar larvae of stem borer were used to evaluate Bt rice impact on T. brassicae. The result showed that emergence rate was lower, the abnormal female rate increased and adult female longevity of the wasp decreased significantly in comparison with the conventional variety. There was no significant difference in gender ratio and parasitism rate under Bt rice treatment in comparison with conventional variety.

The Impact of Rice on Human Civilization and Population Expansion

Abstract The rice plant was basically a tropical semiaquatic grass. Before the advent of agriculture, it served as a food supplement to people who depended on hunting, fishing, and gathering of other food plants for subsistence living. Even today in many areas of the humid tropics where the environment is harsh, rice farming provides a subsistence level of livelihood. However, in areas outside its home habitat where water control, soil fertilization, tillage and weeding, and plant selection were well managed or practiced, rice yields steadily rose and food surpluses from farms served as the main source in supporting rapid increases in human population. Expansion in rice acreage, rises in rice yield, and multiple cropping have fueled flourishing civilizations of several Asian countries. This paper summarizes the fascinating pathway along which a lowly swamp plant has provided the impetus for accelerated progress in national economy, cultural improvements, and population increases in many Asian countries du...

The Impact of Rice on Human Civilization and Population Expansion

The rice plant was basically a tropical semiaquatic grass. Before the advent of agriculture, it served as a food supplement to people who depended on hunting, fishing, and gathering of other food plants for subsistence living. Even today in many areas of the humid tropics where the environment is harsh, rice farming provides a subsistence level of livelihood. However, in areas outside its home habitat where water control, soil fertilization, tillage and weeding, and plant selection were well managed or practiced, rice yields steadily rose and food surpluses from farms served as the main source in supporting rapid increases in human population. Expansion in rice acreage, rises in rice yield, and multiple cropping have fueled flourishing civilizations of several Asian countries. This paper summarizes the fascinating pathway along which a lowly swamp plant has provided the impetus for accelerated progress in national economy, cultural improvements, and population increases in many Asian countries during the past two millennia.

Response to Economic Incentive by Abakaliki Rice Farmers in Eastern Nigeria

The study reported in this article dealt with the introduction and subsequent expansion of a new crop, rice, into the Abakaliki area of Eastern Nigeria, where yams had for centuries been the chief crop, and with the economic response of the small farmers in the area. The results of the study are consistent with the hypothesis that these farmers respond to economic incentives by allocating very efficiently the factors of production at their disposal, and with the hypothesis that their investment decisions tend to maximize returns to scarce resources. The economics of rotation explains the rapid adoption and expansion of rice production. It appears, however, that the initial development impact of rice is exhausted, and only the introduction of a bundle of new, profitable factors of production will give further impetus to development.