OALib Journal期刊

ISSN: 2333-9721



匹配條件: “ LP Amgain” ,找到相關結果約164條。
Accumulated heat unit and phenology of diverse maize varieties as affected by planting dates under Rampur condition, Nepal
LP Amgain
Agronomy Journal of Nepal , 2011, DOI: 10.3126/ajn.v2i0.7526
Abstract: Accumulated heat unit and phenology of a full season open pollinated and three specialty corn (Zea mays L.) cultivars (Hybrid, QPM and Pop) were studied by growing them on three different planting dates (September 1, October 1 and November 1) in RCB design at Rampur Chitwan, Nepal during the winter season of 2009-10. The results indicated that the number of days required to attain different phenological stages were short for the early winter and gradually long for late winter plantings. For all the phenological studies, plants of normal sowing condition (September 1) recorded comparatively higher heat units than the late planting (October 1 and November 1) for all cultivars. Both early and late plantings recorded the higher helio-thermal units at advanced growth phases than at the early stages. The pheno-thermal indices at the earlier growth stages were significantly higher for early planting than the late plantings. The heat use efficiency (HUE) was found to be higher under normal planting as compared to the late plantings. Popular maize variety Rampur Composite was found to be the most suitable to produce stable HUE than the other varieties tested. The specialty corn cultivars could not show stable yield in late planting conditions suggesting their planting could be better for September sowing during early winter seasons. DOI: http://dx.doi.org/10.3126/ajn.v2i0.7526 Agronomy Journal of Nepal (Agron JN) Vol. 2: 2011 pp.111-120
Preceding crops and residue management practices on performance of mustard under zero-till semi-arid condition
LP Amgain, AR Sharma
Agronomy Journal of Nepal , 2013, DOI: 10.3126/ajn.v3i0.8983
Abstract: A field experiment was conducted in 2010/11 and 2011/12 at New Delhi to study the performance of zero-till rainfed mustard. The influence of preceding rainy season crops, viz. pearl millet, cluster bean and green gram; and residue management, viz. no residue, crop residue and Leucaena twigs mulching on this mustard crop was observed. Pooled analysis of mustard seed yield was significantly higher (+51%) in 2010/11 (1.80 t/ ha) than 2011/12 (1.19 t/ha) due to favourable weather condition in the first year. Further, Leucaena twigs mulching resulted higher seed yield of 2.17 t/ha in 2010/11 than 1.94 t/ha in 2011/12. Green gram as preceding crop resulted significantly higher mustard yield in 2010/11, while it was higher after cluster bean in 2011/12. Interaction between crop residue and preceding rainy season crops on growth parameters exerted significant variations, while yield attributes showed the mixed response. Cluster bean with Leucaena twigs led to higher yield of mustard, followed by green gram with crop residue. Economic analysis exhibited the highest net return of mustard grown after cluster bean with Leucaena twigs mulching. From the findings it is observed that growth indices, yield, and yield attributes and economics of mustard were influenced significantly by preceding crops and crop residue application. The effect of Leucaena twigs was found better in 2010/11, while both crop residues and Leucaena twigs mulching were equally effective in 2011/12. Cluster bean as preceding crop to mustard resulted higher yield and net returns, followed by green gram and cluster bean with crop residues. It was suggested that mustard after cluster bean with Leucaena twigs was a high yielding and profitable cropping system under zero-till semi-arid condition. It was concluded that growing mustard after cluster bean with Leucaena twigs mulching resulted increased yield and profitable cropping system for rainfed areas in zero-till semi arid condition of New Delhi.
Effect of different mulching materials on weed dynamics and yield of direct seeded rice in Chitwan, Nepal
R Gaire, KR Dahal, LP Amgain
Agronomy Journal of Nepal , 2013, DOI: 10.3126/ajn.v3i0.9008
Abstract: An experiment was carried out at farmers' field to compare the effects of live mulches and herbicide on weed growth and dynamics, yield, and economic performance of direct seeded rice under humid sub-tropical condition at Phulbari, Chitwan in 2009. The experiment was conducted in Randomized Complete Block Design with eight treatments and three replications. The treatments consisted of i) control, ii) three hand weeding, iii) herbicide application (bispyribac sodium @ 80 ml/ha) + one hand weeding, iv) wheat straw mulch @ 5t/ha + one hand weeding, v) Eupatorium mulch @ 5t/ha + one hand weeding, vi) brown manuring with Sesbania aculeata @ 30 kg/ha, vii) brown manuring with Sesamum indicum @ 2kg/ha, and viii) brown manuring with Crotolaria juncea @ 30 kg/ha. Weed dry matter accumulation was significantly lower with herbicide application (1.15 g/m2) than wheat straw mulch (6.75 g/m2). The treatments with brown manuring and Eupatorium mulch were found to be equally effective in suppressing the weed growth by reducing both dry matter content and weed density. Application of Eupatorium mulch one day after sowing produced significantly higher grain yield (3.5 t/ha) than control (1.77 t/ha), Sesamum brown manuring (2.97 t/ha) and wheat straw mulch (2.83 t/ha). Yield attributes like effective tillers/m2, panicle length and panicle weight were positively correlated with grain yield (r = 0.540, 0.705, 0.531 and 0.613 respectively). The net profit (Rs. 63.17 x 1000/ha) obtained from the treatment with Eupatorium mulch was higher than other tested treatments. Eupatorium mulch and herbicide application recorded equal benefit cost ratio of 2.4. Cultivation of direct seeded rice with the application of Eupatorium mulch or brown manuring (BM) of Sesamum was found effective for increasing yield and net returns in humid subtropical condition of Chitwan. Live mulching could be an eco-friendly weed control options in DSR. The BM option also provides crop residue for the addition of organic matter. This result suggests that BM is a potential alternative of herbicide application. Either mulching with Eupatorium and wheat straw or growing of Sesbania and Crotolaria as BM with rice up to 30 DAS are advisable to increase productivity with reduced cost of production at Chitwan and similar condition.
Food security scenario, challenges, and agronomic research directions of Nepal
DR Bista, LP Amgain, S Shrestha
Agronomy Journal of Nepal , 2013, DOI: 10.3126/ajn.v3i0.8985
Abstract: The interim constitution of Nepal has mentioned “food sovereignty as fundamental right in its constituents 18.3". However, Nepal is experiencing decline in food security situation due to collision of domestic, national and international crises viz. poor agricultural growth, declined national agricultural priority, global climate change, global food crisis, and political instability. There is domination of small and marginal holders in Nepalese agriculture. Although the share of agriculture in country’s GDP is decreasing, it is still 33%, and the highest among the South Asian countries. Cereals are the most important staple food crops in Nepal and rice number one from area and production followed by maize, wheat, millets and barley. The grain-legumes and potatoes are considered the protective food crops for the maintenance of balance human nutrition in Nepal. Out of 88 countries, Nepal ranked 57th in Global Hunger Index (GHI) with GHI value of 19.8 depicting alarming situation of hunger in different regions of the country. Since the III Five year plan (1975- 80), the government of Nepal has given high priority in agriculture, focusing major approaches on promotion of integrated farming systems to address food and nutrition security. However, the food security situation is deteriorating. Adaptive measures on climate change, food distribution policy, crop and livestock insurance, subsidies on fertilizers and seeds, research and development activities on food-grain crops and bio-diversity conservation, inter agency coordination, food and seed buffer stock, and institutional capacity building would the viable options to maintain the food security in Nepal. From the rigorous study of various past research works, it can be concluded that the wider gap of several food grain crops can be reduced by system research, crop modelling, and up-scaling the use of agricultural machineries and tools.
Simulations of nitrogen dynamism in maize and rice by using CSM-CERES-maize and rice models under Chitwan, Nepal
TN Bhusal, A Lamsal, LP Amgain
Agronomy Journal of Nepal , 2010, DOI: 10.3126/ajn.v1i0.7548
Abstract: Crop modeling is being popular in the field of agriculture as a precision tool for resources allocations and their effective utilizations. Two separate field and simulation studies were accomplished in maize and rice that were laid out in the two factor factorial randomized complete block design at Agronomy Farm of Institute of Agriculture and Animal Sciences, Rampur, Chitwan Nepal during spring and rainy season of 2007 and 2008, respectively. CERESmaize and rice models were calibrated using the best performing treatments (7.41 x 10 4 plants /ha for all 3 varieties of maize i.e. Rampur Composite, Upahar and Arun 4 and 160 kg N /ha for Prithivi and Sunaulo Sugandha, and 120 kg N /ha for Masuli varieties of rice). Models were validated using the remaining treatments (6.36, 5.56 and 4.76 x 10 4 plants /ha for all varieties in maize and 40, 80 and 120 kg N /ha for Prithivi and Sunaulo Sugandha and 40, 80 and 160 kg N /ha for Mansuli in rice) to predict growth and productivity of different varieties of maize and rice. Model calibration was done with the determination of genetic coefficients and validation was accomplished with the comparison of observed and simulated values on anthesis days, maturity days, leaf area indices, above ground biomass at maturity, unit weight, and grain yields for both maize and rice. The simulation results on nitrogen dynamics revealed that the nitrification and leaching losses were higher under the conditions of non-flooded maize whereas ammonia volatilization and denitrification losses were higher in the conditions of alternately wetting and drying flooded rice field. The degree and magnitude of N-loss is higher when the N-level is advancing under both field conditions. However, volatilization was almost nil in the non-flooded maize. Results indicated that CERESmaize and rRice models could be applied in simulating the agronomic management options including the efficiency of N-application under the conditions of availability of complete datasets required to run the Cropping System Models (CSM)-CERES-maize and rice models embedded under Decision Support System for Agro Technology Transfer (DSSAT) ver 4.2 in the coming days. DOI: http://dx.doi.org/10.3126/ajn.v1i0.7548 Agronomy Journal of Nepal (Agron JN) Vol. 1: 2010 pp.94-102
Application of csm- ceres-maize model for seasonal and multi-decadal predictions of maize yield in under subtropical condition of Chitwan, Nepal
Lal Prasad Amgain
Journal of Maize Research and Development , 2015, DOI: 10.5281/zenodo.34283
Abstract: The average maize yield of 2.5 t/ha in sub-tropical terai and inner terai of Nepal has been very less than its potential yield of about 5.0 t/ha, for which changing climatic scenarios have been reported the critical factors. Cropping system Model (CSM)-Crop Estimation through Resource and Environment Synthesis (CERES)-Maize, embedded under Decision Support System for Agro-technology Transfer (DSSAT) ver. 4.2 was evaluated from a datasets of field experimentation by growing four diverse maize genotypes viz. full season OPV (Rampur Composite), Quality Protein Maize (Posilo Makai-1), Hybrid (Gaurav) and Pop corn (Pool-12) under three different planting dates (September 1, October 1 and November 1) in 2009-10 at Rampur Campus, Chitwan. The experiment was laid out in two factor factorial randomized complete block design (RCBD) with three replications in slightly acidic (pH 6.7) sandy loam soil having low soil available N( 0.49%) and K (148 kg/ha) and medium P (16.3 kg/ha) status. The ancillary and yield data obtaining from field experiment was analyzed from the M-Stat C software and recorded that Gaurav hybrid produced significantly higher yield under September 1 planting (5.86 t/ha) followed by Posilo Makai 1 (5.55 t/ha), Rampur Composite (5.1t/ha) and the least with Pool-12 (3.45 t/ha). Further, the heat use efficiency of diverse maize genotypes were also calculated by using the mean temperature based accumulative heat unit system and found the stable yields only with Rampur Composite for all planting dates and the rest genotypes were suitable only to the early winter plantings. Model calibration was done by using September 1 planting date for all 4 maize genotypes while validation was accomplished by using the remaining treatments for predicting growth and yield of different maize genotypes. The year 2006- 07 was found 13, 18, 23 and 7% higher in producing the maize yield than the standard year 2009-10 for Rampur Composite, Posilo Makai-1, Gaurav and Pool-12, respectively. Further, the different climate change scenarios as advocated by IPCC (2007) for 2020, 2050 and 2080 from base line of 2009-10 was studied to simulate the growth and yield performance of diverse maize genotypes with September 1 planting date and found that there would be increment in winter maize yield up to 2020 scenario of climate change and the drastic yield loss would be on 2050 to 2080 scenarios under the present levels of agronomic management options and urged for the new climate change adaptation and mitigation production technologies.
Psalm 51: Take not your Holy Spirit away from me
LP Maré
Acta Theologica , 2008,
Abstract: Even a cursory reading of the New Testament makes one aware of numerous references to the Holy Spirit. The New Testament is thus normally the focus for studies on pneumatology. However, there are many references to jwr in the Old Testament of which 107 refer to God’s activities in nature and in the lives of human beings. In these passages jwr is translated as “spirit”, indicating the work of the Spirit of God. Pentecostals believe that the presence of the Spirit of God in the lives of believers during the Old Testament period was sporadic and temporary. It was only after the outpouring of God’s Spirit on the Day of Pentecost that the Spirit came to dwell permanently within believers. This article challenges that assumption by analysing Psalm 51. Such analysis reveals that the Spirit of God lived permanently in the life of an Old Testament believer, and ascertains the role of the Spirit of God in the life of the worshipper.
L-Glutamine Metabolism Is Not A Major Source Of Increased Free Radical Generation In Goldblatt Renovascular Hypertension
LP Odigie
Nigerian Journal of Physiological Sciences , 2003,
Abstract: Glutamine has been implicated in the generation of free radicals and free radicals-induced impairment of vascular responses to nitrovasodilators may underlie the pathogenesis of vasospasm in 2K-1C hypertension. Plasma glutamine levels were therefore determined in 2K-1C and 1K-1C hypertensive rats in order to ascertain the direction of change of this amino acid in this model of renovascular hypertension. Hypertension was induced in male SD rats (99±2.3 g) by subjecting them to left renal artery clamping using a 0.2mm silver clip (2K-1C, n=7) under ether anesthesia. Control rats (n=7) were sham-operated (Sh-Op). Rats with 1K-1C hypertension (n=8) and uni-nephrectomized controls (1K:, n=8), additionally underwent right nephrectomy. 10 weeks (2K-1C) and 4 weeks (1K-1C) respectively after renal artery clamping, clipped rats exhibited elevated blood pressures (P<0.001), which was sustained under anaesthesia. No significant difference in plasma glutamine levels were found in hypertensive rats compared to controls (11.3±1.3 mg/l in 2K-1C vs. 12.3±2.1 mg/l in Sh-Op, n=7 and 9.0±1.4 mg/l in 1K-1C vs. 9.6±1.4 mg/l in 1K:, n=8). Serum creatinine and. serum electrolyte concentrations were not significantly different in clipped rats compared to their respective controls. This study shows that plasma glutamine level is not altered in the established stages of Goldblatt renovascular hypertension. The significance of this observation is unclear. Nevertheless, these findings suggest that glutamine is not in the main stream of free radicals generation and is therefore not a reliable index of oxidative stress in this model of renovascular hypertension.
Malaysian Family Physician , 2008,
Abstract: Qualitative data is often subjective, rich, and consists of in-depth information normally presented in the form of words. Analysing qualitative data entails reading a large amount of transcripts looking for similarities or differences, and subsequently finding themes and developing categories. Traditionally, researchers `cut and paste’ and use coloured pens to categorise data. Recently, the use of software specifically designed for qualitative data management greatly reduces technical sophistication and eases the laborious task, thus making the process relatively easier. A number of computer software packages has been developed to mechanise this `coding’ process as well as to search and retrieve data. This paper illustrates the ways in which NVivo can be used in the qualitative data analysis process. The basic features and primary tools of NVivo which assist qualitative researchers in managing and analysing their data are described.
Malaysian Family Physician , 2008,

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