A model for deficit irrigation analysis of crops

2009 ◽  
Vol 5 (1) ◽  
pp. 31-53
Author(s):  
K. Adekalu ◽  
D. Okunade
Keyword(s):  
Soil Water ◽  
Deficit Irrigation ◽  
Maximum Yield ◽  
Irrigation Scheduling ◽  
Rooting Depth ◽  
Irrigated Agriculture ◽  
Cost Ratio ◽  
Water Reduction ◽  
Benefit Cost Ratio ◽  
Benefit Cost

Scarcity and high cost of water is the most important limiting factor for crop production in irrigated agriculture. Deficit irrigation can be implemented to optimize the use of available water resources and put more land on productive use. A model was developed to determine the savings in water and the economic benefit derived from deficit irrigation. The model was tested using yield-water use data of maize, tomato, okra and cowpea grown under irrigated condition in Nigeria. Cowpea is the main source of plant protein in the local diet and okra one of the major vegetable crops planted in Nigeria. The results indicated that some water reduction is possible without affecting yields. The optimum water reduction is 4, 8, 12 and 18% for maize, tomato, okra and cowpea, respectively. Maximum allowable water reduction increased with increase in the benefit-cost ratio of each tested crop. The maximum allowable water reduction is 9, 13, 21 and 32%, with a corresponding increase in cultivated area by 10, 16, 23 and 50% for maize, tomato, okra and cowpea, respectively, at a benefit-cost ratio of 1.5. The model, in most of the years showed that the optimum moisture reduction level increased with increasing seasonal rainfall. Increasing rooting depth or soil water holding capacity also increased the relative maximum yield for water reduction levels up to 40–50%. The developed model would be useful in determining the effect of soil, water, and crop variables on deficit irrigation of crops in different agro-ecological zones with appropriate crop and soil data input, and proper irrigation scheduling.

scholarly journals Assessment of management modules against yellow stem borer in paddy

2021 ◽  
Vol 8 (2) ◽  
pp. 117-119
Author(s):  
SURYA BHUSHAN ◽  
RAVI SHANKER
Keyword(s):  
Field Experiments ◽  
Maximum Yield ◽  
Stem Borer ◽  
Cost Ratio ◽  
Kharif Season ◽  
Benefit Cost Ratio ◽  
Yellow Stem Borer ◽  
Benefit Cost

Yellow stem borer (YSB) is one of the most serious and monophagous pest of paddy in India. Field experiments were carried out to assess the different management modules against the yellow stem borer in paddy during the Kharif season of 2019 and 2020. The results on efficacy of modules revealed that during both the years the minimum ‘Dead Heart’ (DH) (10.1 and 11.4% during the year 2019 and 2020, respectively) was recorded in M3 (clipping of terminal shoots at the time of transplanting and application of cartap hydrochloride 50 SP) followed by M2 (11.9 and 14.5% during the year 2019 and 2020, respectively) in which 1st application was done with fipronil 0.3G and 2nd with NSKE 5% and M1 (19.6 and 20.9% during the year 2019 and 2020, respectively) i.e. farmers’ practice where only carbofuran 3G was applied. ‘White Ear Head’ (WEH) was also recorded minimum in M3 (11.6 and 12.1% in the year 2019 and 2020, respectively) followed by M2 (13.3 and 16.4% in the year 2019 and 2020, respectively) and M1 (20.8 and 22.4% in the year 2019 and 2020, respectively) in paddy. Maximum yield (33.8 and 43.1 q/ha during the year 2019 and 2020, respectively) was also recorded in Module 3 practiced clipping of terminal shoots and spraying with cartap hydrochloride 50 SP with the highest BC(Benefit: Cost) ratio 1.52:1 and 1.94:1 in the year 2019 and 2020, respectively. The overall results of the present study indicating the overall superiority of M3 (clipping of terminal shoots at the time of transplanting and two applications of cartap hydrochloride 50 SP at 40 and 60 DAT) in all the aspects i.e. DH, WEH, yield and BC ratio.

scholarly journals Management Of Thrips And Pod Borers Using Chemicals, Botanicals And Biopesticides In Mungbean

2020 ◽  
Vol 17 (2) ◽  
pp. 79-91
Author(s):  
KN Islam ◽  
MMH Khan ◽  
MA Latif ◽  
MM Uddin ◽  
MM Islam
Keyword(s):  
Control Measure ◽  
Block Design ◽  
Maximum Yield ◽  
Effective Control ◽  
Cost Ratio ◽  
Marginal Benefit ◽  
Benefit Cost Ratio ◽  
Pod Borer ◽  
Legume Pod Borer ◽  
Benefit Cost

The experiment was conducted to find out effective control measure against thrips and pod borers of mungbean by various means, including chemicals, botanicals and biopesticide. The mungbean variety, BARI Mung-6 was grown in the field and six treatments viz., T1 [Azadirachtin (Bioneem plus 1EC)], T2 [Bacillus thuringiensis (Bt. powder)], T3 [Spinosad (Tracer 45SC)], T4 [Chlorpyrifos + Cypermethrin (Nitro 505EC)], T5 [Thiamethoxam + Chlorantraniliprole (Voliam flexi 300SC)] and T0 [Untreated control (water spray)] were set in randomized complete block design (RCBD) with three replications. The insecticidal treatment options showed significantly different performance against thrips (Megalurothrips distalis), gram pod borer (Helicoverpa armigera) and legume pod borer (Maruca vitrata) on mungbean. The lowest population of thrips, gram pod borer and legume pod borer was found in Voliam flexi 300SC treated plot which showed maximum percent reduction of these pests. The lowest percent pod infestation by pod borers observed by the same treatment. Bioneem plus showed the intermediate results considering all the parameters. The maximum yield (1254.50 kg ha-1) and the highest marginal benefit cost ratio (MBCR) (6.68) were obtained from Voliam flexi 300SC. Considering effectiveness and marginal benefit cost ratio, Voliam flexi 300SC was more effective among treatments for controlling thrips and pod borers of mungbean followed by Nitro 505EC. SAARC J. Agri., 17(2): 79-91 (2019)

Effect of crop establishment methods on yield and economics of cultivation of wheat

2020 ◽  
Vol 44 (03) ◽  
pp. 16-22
Author(s):  
Subhash Chandra ◽  
Sidhhartha Raj ◽  
J.P. Sinha ◽  
Anni Singh ◽  
Anil Kumar Sharma
Keyword(s):  
Sandy Loam ◽  
Maximum Yield ◽  
Cost Ratio ◽  
Net Return ◽  
Seed Rate ◽  
Benefit Cost Ratio ◽  
Wheat Cultivation ◽  
Loam Soil ◽  
Benefit Cost ◽  
Seeding Efficiency

Zero till seed-cum-ferti drill, rice-wheat seeder and broadcasting method, as treatments T1 , T2 & T3 respectively, were used for wheat sowing at 100.0 kg/ha seed rate in pulverized sandy loam soil. Rice-wheat seeder delivered optimum seed rate upon maintenance of minimum of 3.75 kg seed per box. At every 52.0 meter run of machine 0.5 kg seed was to be filled in seed boxes to maintain uniform seeding at 100.0 kg/ha seed rate. The machines in treatment T1 and T2 had field capacities 0.49 ha/h and 0.169 ha/h and field efficiencies 71% & 82% respectively. Rice wheat seeder had registered 96.19% seeding efficiency in comparison to 97.67% seeding efficiency of seed drill. Maximum yield (4.27 t) was obtained in treatment T2, followed by treatment T1 (4.186 t) and T3 (4.08 t). Benefit-cost ratio of treatment T3 was found highest 4.77:1 followed by treatment T2 (4.66:1) in spite of minimum net return per hectare (Rs.71607.0) among all treatments. Highest net return/ ha of Rs.74454.0 was in treatment T2 , followed by treatment T1 (Rs.72089.0). Obviously, yield and economics of use of rice wheat seeder equipment justifies its utility for wheat cultivation by small and marginal farmers.

scholarly journals Economic Evaluation of Some Soils of Arid Regions of Anantapur District for Groundnut Cultivation

Agropedology ◽  
2019 ◽  
Vol 28 (2) ◽  
Author(s):  
S. Dharumarajan ◽  
◽  
M. Lalitha ◽  
S. C. Ramesh Kumar ◽  
R. Vasundhara ◽  
...  
Keyword(s):  
Arid Regions ◽  
Land Evaluation ◽  
Rooting Depth ◽  
Cost Ratio ◽  
Benefit Cost Ratio ◽  
Sand Surface ◽  
Heavy Soil ◽  
Soil Units ◽  
Benefit Cost ◽  
Deep Soils

The present study was carried out in Bukkarayasamudhrum mandal of Anantapur district of Andhra Pradesh to assess the economic viability of different soil units for supporting groundnut crop. Advanced remote sensing and GIS technologies were used to map the soil resources at phase level. The non-parametric approach revealed that 57.6 % of the area is moderately suitable for groundnut cultivation and 21 % of area is marginally suitable due to limitation of rooting depth and heavy soil texture. Economic land evaluation results showed that non-calcareous, moderately deep soils with loamy sand surface texture gives comparatively higher benefit cost ratio than other soils.

scholarly journals Yield and economics of chilli hybrid Sitara with the use of different nutrient management practices and organic amendments

2018 ◽  
Author(s):  
B. M. Ranjitha ◽  
T. B. Allolli ◽  
D. R. Jhanavi ◽  
N. Kavyashree ◽  
S. Gururaj ◽  
...  
Keyword(s):  
Field Experiment ◽  
Management Practices ◽  
Nutrient Management ◽  
Maximum Yield ◽  
Organic Amendments ◽  
Cost Ratio ◽  
Benefit Cost Ratio ◽  
Yield Parameters ◽  
High Benefit ◽  
Benefit Cost

A field experiment was conducted in Dharwad district, Karnataka during kharif season of 2015-2016, with an objective to assess the effectiveness of nutrient management practices and organic amendments on yield and economics of chilli (Capsicum annuum L.) hybrid Sitara. The results revealed that the maximum yield parameters were recorded due to adoption of INM practices (among nutrient management practices) and Panchagavya (among organic amendments). INM practices and Panchagavya recorded high Benefit: cost ratio of 2.7 and 2.6 respectively.

scholarly journals Effect of Sowing Date of Sweet Corn on Potato + Sweet Corn Intercropping System

2016 ◽  
Vol 18 (2) ◽  
pp. 15-21
Author(s):  
AA Begum ◽  
MN Islam ◽  
SS Kakon ◽  
MAHM Kamal ◽  
MA Aziz ◽  
...  
Keyword(s):  
Sweet Corn ◽  
Agricultural Research ◽  
Maximum Yield ◽  
Sowing Date ◽  
Research Field ◽  
Cost Ratio ◽  
Research Station ◽  
Gross Margin ◽  
Benefit Cost Ratio ◽  
Benefit Cost

An experiment was conducted at the Agronomy research field of Bangladesh Agricultural Research Institute (BARI), Joydebpur, Gazipur and at Regional Agricultural Research Station, Burirhat, Rangpur during Rabi season of 2013-14 and 2014-15 to find out optimum sowing date of sweet corn in potato + sweet corn intercropping system for getting maximum yield and economic return. Six treatments viz., simultaneous sowing of potato and sweet corn, sweet corn sown at 10 days after potato planting (DAPP), sweet corn sown 20 DAPP, sweet corn sown 30 DAPP, sole potato and sole sweet corn were tested in this study. Sweet corn sown at 20 DPP produced the highest potato equivalent yield (Joydebpur: 41.41 t ha-1 in 2013-14 and 42.22 t ha-1 in 2014-15 and Rangpur: 42.29 t ha-1 in 2013-14 and 42.52 t ha-1 in 2014-15). The highest gross return at Joydebpur Tk. 431050 ha-1 and at Rangpur Tk. 436248 ha-1, gross margin at Joydebpur Tk. 286805 ha-1 and at Rangpur Tk. 271985 ha-1 and benefit cost ratio at Joydebpur 2.99 and at Rangpur 3.01 were observed over the years in the same treatment. In this treatment, tuber yield was reduced 3.4-4.1% in Joydebpur and 7.8-8.4% in Rangpur due to intercropping. The result indicated that sweet corn sown 20 DAPP might be suitable intercrop combination for getting maximum yield and economic return.Bangladesh Agron. J. 2015, 18(2): 15-21

scholarly journals Management of brinjal shoot and fruit borer using selected botanicals

2018 ◽  
Vol 43 (3) ◽  
pp. 431-440
Author(s):  
H Sultana ◽  
MA Mannan ◽  
MM Kamal ◽  
KG Quddus ◽  
S Das
Keyword(s):  
Leaf Extract ◽  
Maximum Yield ◽  
Vegetative Stage ◽  
Cost Ratio ◽  
Benefit Cost Ratio ◽  
Fruiting Stage ◽  
Fruit Borer ◽  
Benefit Cost ◽  
Neem Leaf Extract ◽  
Treated Plot

The study was conducted to evaluate the effect of botanicals namely neem leaf extract, neem oil, mahogany oil, mahogany oil + mahogany cake, garlic extract, tobacco leaf extract along with an untreated control to manage brinjal shoot and fruit borer (BSFB). The percent shoot infestation reduction over control was the highest in mahogany oil + mahogany cake treated plot resulting 62.39%, 64.44%, 67.86% and 71.05% reduction at vegetative stage and early, mid and late fruiting stage, respectively. The same treatment provided the highest fruit infestation reduction over control resulting 86.70%, 85.08% and 85.50% reduction at early, mid and late fruiting stage, respectively. The lowest number of larvae per infested shoot was recorded 1.10 and 1.08 in the same treatment at early and mid fruiting stage, respectively but notat vegetative stage and late fruiting stages. The number of larvae per infested fruit was similarly lowest having 1.50, 1.06 and 1.07 at early, mid and late fruiting stage, respectively using the same approach. The maximum yield (35.82 t ha-1) was achieved in the mahogany oil + mahogany cake treated plot with the highest benefit cost ratio (2.35).Bangladesh J. Agril. Res. 43(3): 431-440, September 2018

Comparative Effectiveness Of Seed Treating And Foliar Insecticides Against Sucking Pests Of Cotton And Impact On Their Natural Enemies

2013 ◽  
Vol 38 (1) ◽  
pp. 61-70 ◽  
Author(s):  
SMA Hossain ◽  
MA Baque ◽  
MR Amin
Keyword(s):  
Natural Enemies ◽  
Untreated Control ◽  
Seed Treatment ◽  
Foliar Spray ◽  
Cost Ratio ◽  
Research Station ◽  
Benefit Cost Ratio ◽  
Benefit Cost ◽  
Thrips Population ◽  
Cotton Cultivar

The Imidacloprid insecticide, Gaucho 70 WS at 1.5, 2.5, 3.5, 4.5 and 5.5 g/kg seed was used as seed treatment and monocrotophos 40 WSC at 1120 ml/ha was applied as foliar spray on CB9 cotton cultivar to suppress aphid, whitefly and thrips, and impact on their natural enemies during 2008-2011 at the Regional Cotton Research Station, Dinajpur, Bangladesh. The activity of natural enemies, such as ladybird beetle, lacewing, syrphid, and spider population on the sucking pests attacking cotton cultivar CB9 and yield of cotton were recorded. Imidacloprid significantly reduced aphid, whitefly, and thrips population on cotton crops compared to untreated control or foliar spray of monocrotophos 40 WSC at 1120 ml/ha. Ladybird beetles, lacewings, syrphids, and spiders were abundant in the field but their population decreased in the treated plots compared to untreated control. The CB9 cotton cultivar produced significantly higher yield (1.73 t/ha) with a benefit cost ratio 12.47 when seeds were treated with Imidacloprid at 5.5 g/kg fuzzy seed. This study indicated that Imidacloprid (Gaucho 70 WS) used as a seed treatment may be suggested to the cotton growers for controlling sucking pests. Bangladesh J. Agril. Res. 38(1): 61-70, March 2013 DOI: http://dx.doi.org/10.3329/bjar.v38i1.15190

EVALUASI TERHADAP PENGELOLAAN SAMPAH DALAM MENINGKATKAN PELAYANAN ASET DI KOTA PEMATANGSIANTAR

2017 ◽  
Vol 13 (3) ◽  
pp. 240
Author(s):  
Novdin M Sianturi
Keyword(s):  
Net Present Value ◽  
Payback Period ◽  
Rate Of Return ◽  
Cost Ratio ◽  
Internal Rate Of Return ◽  
Present Value ◽  
Benefit Cost Ratio ◽  
Internal Rate ◽  
Benefit Cost

Abstrak: Pengelolaan sampah di Kota Pematangsiantar masih bertumpu pada pendekatan akhir (kumpul-angkut-buang), dengan tingkat pelayanan yang rendah, sehingga untuk meningkatkan pelayanan sampah, perlu dilakukan pemilahan di tempat penampungan sementara (TPS). Penelitian ini bertujuan untuk mengkaji sistem pengelolaan sampah dengan melakukan pemilihan di TPS dapat meningkatkan pelayanan aset persampahan sampai tahun  2015 secara teknis operasional dan dari aspek keuangan. Analisa teknis operasional aset pengelolaan sampah mulai dari pewadahan, pengumpulan dan pengangkutan sedangkan analisa keuangan dan analisa kelayakan menggunakan Net Present Value, Internal Rate of Return, Benefit/Cost Ratio, dan Payback Period. Dari hasil analisa tersebut diperoleh suatu sistem pengelolaan sampah dengan pemilihan di TPS berdasarkan zona pelayanan dengan skala prioritas secara bertahap daritahun 2013-2017, dapat meningkatkan cakupan pelayanan sampah eksisting rata-rata 6,69 %, cakupan pelayanan TPS eksisting rata-rata 8,29 %, dan cakupan pelayanan truk pengangkut sampah eksisting rata-rata 12,03 %. Investasinya layak, diperoleh Net Cashflow pada tahun 2020 sebesar Rp 1.720.242.284,-, NPV suku bunga 15 % bernilai positif, IRR > MARR 15 %,  B/C Ratio > 1, dan PP 4,7 tahun, lebih pendek dari periode investasi 10 tahun. Dari Metode penelitian ini maka pengumpulan data, observasi lapangan dan pengukuran contoh timbulan sampah dengan sampel 4 TPS perumahan yang terlayani pengangkutan.

Profitability and Efficiency Analyses of Small Scale Rice processing units in Ngoketunjia Division, North West Region, Cameroon.

2014 ◽  
Vol 3 (2) ◽  
pp. 177-182
Author(s):  
Bime M.J ◽  
Fon D.E ◽  
Ngalim S.B ◽  
Ongla J
Keyword(s):  
Value Added ◽  
Primary Data ◽  
Small Scale ◽  
Fixed Cost ◽  
Cost Ratio ◽  
Parboiled Rice ◽  
North West ◽  
Benefit Cost Ratio ◽  
Benefit Cost ◽  
Rice Processing

Rice production and processing over the years has been on an increase with more small holders entering the business. This study on profitability of processing and marketing of small scale rice processors had as objective to analyse the profitability levels of rice processing and marketing by small scale processors, determine the value added to the commodity at each stage  and also identify the constraints faced by these processors. The study used primary data collected using well-structured questionnaire from millers only, miller traders for white/parboiled rice through a multistage sampling technique. Results showed that the net processing income (3,151,201), value added (8,147,456) and efficiency (138) for miller-traders of white rice was highest, followed by miller-traders for parboiled rice and lastly millers only. Results further showed that millers only had Benefit/cost ratio of 0.4 indicating that milling only is not profitable due to small quantities milled, and high fixed cost. Miller-traders for parboiled rice had a benefit/cost ratio of 2.3 implying that their venture is most profitable. Based on the results, it was recommended that millers only should purchase large quantities of paddy to enable them reduce the overhead cost. Also the services of parboilers should reflect in the sales price of parboiled rice so that the parboiling services can be paid for.

Sign in / Sign up

Export Citation Format

Share Document