scholarly journals Assessing the Economic and Energy Use Efficiencies of Direct Seeded and Transplanted Rice (Oryza sativa L.) in Lamjung, Nepal

2016 ◽  
Vol 4 (2) ◽  
pp. 172-177
Author(s):  
K. Thapa ◽  
A. Shrestha ◽  
M. P. Neupane ◽  
L. P. Amgain
Keyword(s):  
Oryza Sativa ◽  
Energy Use ◽  
Oryza Sativa L ◽  
Block Design ◽  
Agricultural System ◽  
Cost Ratio ◽  
Energy Use Efficiency ◽  
Direct Seeded ◽  
Use Efficiency ◽  
Input Ratio

To meet the basic food needs of expanding human population a productive sustainable agricultural system must become a major priority in Nepal. An on-farm study was conducted to investigate the economic and energy use efficiencies of rice (Oryza sativa L.) under direct seeded (DSR) and transplanted (TPR) conditions at Lamjung campus. Five varieties of rice differing in phenology and growth (viz. US382, Sukha dhan, NR10676, NR10490 and Khumal10) were tested in Randomized Complete Block Design under DSR and TPR conditions with three replications. The statistical resulted revealed that the average grain yield was highest for TPR-NR10490 (7.52t ha-1), whereas the lowest in DSR- NR10676 (1.96t ha-1). The output energy obtained from grain and biomass yield was highest under TPR-NR10490 (2.05x105MJ ha-1) followed by the lowest in DSR-NR10676 (7.35x104MJ ha-1). In TPR-NR10490 the most energy use efficiency (output-input ratio of 9.22) was obtained whereas in TPR-Sukha dhan, energy use efficiency (output-input ratio of 1.01) was least. Partial-factor productivity and nutrient uptake was highest in TPR-NR10490 and the lowest in DSR- NR10676. The maximum productivity and profitability was recorded in TPR-NR10490 while reverse in DSR-Sukha dhan. The benefit cost ratio was found highest in TPR- NR10490 (4.45) and lowest in DSR-Sukha dhan (2.31). From above result, NR10490 was found to be the best variety under transplanted condition.Int J Appl Sci Biotechnol, Vol 4(2): 172-177  

No-till and mulching enhance energy use efficiency and reduce carbon footprint of a direct-seeded upland rice production system

2020 ◽  
Vol 271 ◽  
pp. 122700 ◽  
Author(s):  
Gulab Singh Yadav ◽  
Subhash Babu ◽  
Anup Das ◽  
K.P. Mohapatra ◽  
Raghavendra Singh ◽  
...  
Keyword(s):  
Carbon Footprint ◽  
Production System ◽  
Energy Use ◽  
Upland Rice ◽  
Rice Production ◽  
Energy Use Efficiency ◽  
No Till ◽  
Direct Seeded ◽  
Use Efficiency

Energy Evaluation of Kala Zeera (Bunium persicumBios.) cultivation under Gurez valley of Temperate Kashmir

2017 ◽  
Vol 4 (03) ◽  
Author(s):  
PARMEET SINGH ◽  
M. A. RATHE ◽  
R. H. KANTH ◽  
LAL SINGH ◽  
PURSHOTAM SINGH ◽  
...  
Keyword(s):  
Energy Balance ◽  
Energy Input ◽  
Energy Use ◽  
Energy Balance Equation ◽  
Energy Output ◽  
Agricultural System ◽  
Energy Use Efficiency ◽  
Energy Evaluation ◽  
Energy Consuming ◽  
Use Efficiency

Energy being the critical aspect of agricultural production, the modern agricultural system takes into account all the agricultural operations in terms of energy input and the yield obtained as energy output. It is this energy balance equation which describes the viability of a system. Depending upon the variation in energy consumption among various agro–climatic and environmental conditions and the output therein, a wide variation exists in the viability of these systems. In the present study, the energy balance in Kala zeera management system was taken into consideration. Data and information were collected and different energy use efficiency indices were calculated. Amon the production practices in Kala zeera cultivation, consumed root tubers for sowing were the most energy consuming input (43.32%) followed by diesel fuel (20.28 %) and Nitrogen (18.30). the total energy input could be classified in Kala zeera fields as direct ( 10.80%), indirect (25.60%), renewable (43.3%) and non-renewable (20.27%). Overall in view of sustainability,it is recommended that major input consumptive processes shall be optimized to increase energy use efficiency

scholarly journals Weed dynamics and yield of direct seeded upland autumn rice (oryza sativa l.) Varieties as influenced by integrated weed and nutrient management practices

2018 ◽  
Author(s):  
G Goswami ◽  
N C. Deka ◽  
N J Ojha
Keyword(s):  
Oryza Sativa ◽  
Management Practices ◽  
Nutrient Management ◽  
Upland Rice ◽  
Oryza Sativa L ◽  
Block Design ◽  
Rice Varieties ◽  
Randomized Block Design ◽  
Direct Seeded ◽  
Weed Dynamics

A field experiment was conducted during autumn, 2014 at ICR Farm, Assam Agricultural University, Jorhat, Assam to compare three different direct seeded upland rice varieties along with different integrated weed and nutrient management practices. The experiment was carried out in factorial randomized block design replicated thrice with 15 treatments involving 3 varieties: Inglongkiri, Maizubiron and Rasi along with 5 treatments of weed and nutrient management,

scholarly journals Effect of cultivars and weed management practices on productivity, profitability and energetics of dry direct-seeded rice

2021 ◽  
Vol 58 (3) ◽  
pp. 442-447
Author(s):  
Pooja K ◽  
Saravanane P ◽  
Sridevi V ◽  
Nadaradjan S ◽  
Vijayakumar S
Keyword(s):  
Weed Management ◽  
Energy Use ◽  
Management Practices ◽  
Cost Ratio ◽  
Energy Productivity ◽  
Benefit Cost Ratio ◽  
Net Returns ◽  
Direct Seeded ◽  
Use Efficiency ◽  
Benefit Cost

A field experiment was conducted from September 2019 to January 2020 (thaladi season) at Pandit Jawaharlal Nehru College of Agriculture and Research Institute, Karaikal, Puducherry to study the effect of cultivars and weed management practices on productivity, profitability and energetics of dry direct-seeded rice (DDSR). The experiment was laid out in a split-plot design (SPD) with 15 treatment combinations and replicated thrice. Cultivars (ADT 46, CO 52 and improved white ponni) were assigned to main plots and 5 weed management practices viz. application of pendimethalin @ 1 kg a.i ha-1 as pre-emergence (PE); bispyribac-sodium @ 0.02 kg a.i ha-1 as post-emergence (POE) at 20 DAS; pendimethalin @ 1 kg a.i ha-1 followed by (fb) bispyribac-sodium @ 0.02 kg a.i ha-1; hand weeding (HW) twice at 20 and 40 DAS and weedy check were assigned to sub-plots. Results have shown that cultivars 'ADT 46' was the most promising cultivar for DDSR situation since it recorded the highest grain yield (3.76 t ha-1), energy use efficiency (4.43), energy productivity (0.3 kg MJ-1), net returns (Rs. 43.74 × 103 ha-1) and benefit: cost ratio (1.52). Among the weed management practices, sequential application of pendimethalin fb bispyribac-sodium found superior over other treatments in terms of grain yield (3.73 t ha-1), energy use efficiency (4.35), energy productivity (0.3 kg MJ-1), net returns (Rs. 42.27× 103 ha-1) and benefit: cost ratio (1.43). Thus, cultivation of 'ADT 46' integrated with sequential application of pendimethalin fb bispyribac-sodium could be recommended for DDSR under coastal deltaic ecosystem of south India.

scholarly journals Bioherbicidal Properties of Parthenium hysterophorus, Cleome rutidosperma and Borreria alata Extracts on Selected Crop and Weed Species

Agronomy ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 643
Author(s):  
Mst. Motmainna ◽  
Abdul Shukor Juraimi ◽  
Md. Kamal Uddin ◽  
Norhayu Binti Asib ◽  
A. K. M. Mominul Islam ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Plant Extracts ◽  
Oryza Sativa L ◽  
Block Design ◽  
Parthenium Hysterophorus ◽  
Weedy Rice ◽  
Test Plant ◽  
Ageratum Conyzoides ◽  
Natural Herbicide ◽  
Cleome Rutidosperma

Natural product-based herbicides could be the effective alternatives to synthetic chemical herbicides for eco-friendly weed management. This research, therefore, was conducted to identify the phytotoxic properties of Parthenium hysterophorus L., Cleome rutidosperma DC. and Borreria alata (Aubl.) DC. with a view to introducing them as a tool for natural herbicide development. The methanol extracts of these plants were examined on the germination and growth of Zea mays L., Oryza sativa L., Abelmoschus esculentus (L.) Moench and Amaranthus gangeticus L., Oryza sativa f. Spontanea Roshev. (Weedy rice), Echinochloa colona (L.) Link., Euphorbia hirta L., and Ageratum conyzoides L. under laboratory and glasshouse conditions. A complete randomized design (CRD) with five replications and randomized complete block design (RCBD) with four replications were laid out for laboratory and glasshouse experiments, respectively. In the laboratory experiment, three plant extracts of 0, 6.25, 12.5, 50, and 100 g L−1 were tested on survival rate, hypocotyl, and radicle length of eight test plant species. No seed germination of A. conzyoides, E. hirta, and A. gangeticus were recorded when P. hysterophorus extract was applied at 50 g L−1. C. rutidosperma had the same effect on those plants at 100 g L−1. In the glasshouse, similar extracts and concentrations used in the laboratory experiments were sprayed on at the 2–3 leaf stage for grasses and 4–6 for the broadleaf species. Tested plants were less sensitive to C. rutidosperma and B. alata compared to P. hysterophorus extract. Among the weeds and crops, A. conyzoides, E. hirta, A. esculentus and A. gangeticus were mostly inhibited by P. hysterophorus extract at 100 g L−1. Based on these results, P. hysterophorus was the most phytotoxic among the tested plant extracts and could be used for developing a new natural herbicide for green agriculture.

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