Search Result of "Pansak, W"

About 8 results
Img

งานวิจัย

Assessing soil conservation strategies for upland cropping in Northeast Thailand with the WaNuLCAS model (2009)

หัวหน้าโครงการ:Wanwisa Pansak

ผู้ร่วมโครงการ:Imgดร.ธนูชัย กองแก้ว, ผู้ช่วยศาสตราจารย์, ImgB. Lusiana, ImgC. Marohn, ImgGeorg Cadisch, ImgThomas Hilger, ImgWanwisa Pansak

แหล่งทุน:ศูนย์พันธุวิศวกรรมและเทคโนโลยีชีวภาพห่งชาติ สำนักงานพัฒนาวิทยาศาสตร์และเทคโนโลยีแห่งชาติ

Img

ผลงานตีพิมพ์ในวารสารวิชาการ

Assessing soil conservation strategies for upland cropping in Northeast Thailand with the WaNuLCAS model

ผู้แต่ง:ImgPansak, W, ImgHilger, T, ImgLusiana, B, ImgDr.Thanuchai Kongkaew, Assistant Professor, ImgMarohn, C, ImgCadisch, G,

วารสาร:

Img Img

Img

ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Image-Processed Mango Sizing Machine)

ผู้เขียน:Imgดร.บัณฑิต จริโมภาส, ศาสตราจารย์, ImgPansak Siriratchatapong, ImgThanit Chaiyaboonyathanit, ImgSuttiporn Niemhom

สื่อสิ่งพิมพ์:pdf

Abstract

Development of mango sizing machine is based upon linear relationship between projected area and weight of mango. The machine comprises a portable TV camera taking a picture of moving mango by the control of the photocell. The picture will be scanned, white – pixel counted and compared with the number of white pixel of the standard size mango by 32 bit 68008. Then, it will give signal to a solinoid mounted on the conveyor to tap the mango into the corresponding rotary bin Sizing machine testing exhibited sizing capacity of 1 ton per hour at the sizing efficiency of 89.77% with ignorable mechanical damage. The machine could size mango (Namdog Mai No.4) into 4 classes (extra fruit weight>360 g., No. 1 fruit weight 310.1 to 360 g., No. 2 fruit weight 250.1 to 310 g., and No. fruit weight 200 to 250 g) at belt speed 37.8 cm/sec.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 025, Issue 5, Jan 91 - Dec 91, Page 131 - 139 |  PDF |  Page 

Img

ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Assessing Rubber Intercropping Strategies in Northern Thailand Using the Water, Nutrient, Light Capture in Agroforestry Systems Model)

ผู้เขียน:ImgWanwisa Pansak

สื่อสิ่งพิมพ์:pdf

Abstract

The Water, Nutrient, Light Capture in Agroforestry Systems (WaNuLCAS) model was used to evaluate and understand the impact of crop management on intercropping scenarios and competition between rubber and associated annual crops. The intention was to identify sustainable production systems with economic benefits for small-scale landholders in Thailand. The WaNuLCAS model was used to predict maize and rubber productivity under various management scenarios of intercropping and sole cropping in the Phitsanulok province (16o55' N, 100o32' E), Thailand. Model scenarios were simulated for rubber (clone RRIM600) grown with spacings of 2.5 ? 7 m, 3 ? 7 m and 3 ? 8 m under sole cropping and intercropping with maize. The yield of maize was substantially influenced by rubber-tree spacing in the intercropping systems. After 3 yr, the average yield of maize was decreased from 7 to 3 t.ha-1 by rubber tree growth if organic fertilizer was not applied. Organic fertilizer application mitigated the negative influences of rubber trees until the seventh cropping season. After 8 yr, the maize yield decreased to 0.4 t.ha-1. Hence, rubber intercropped with maize with the application of recommended chemical fertilizer plus organic fertilizer was the best way to mitigate competition between rubber and maize. In the long term, the rubber tree girth and wood volume from sole cropping were higher than from the rubber intercropping systems. With a higher rubber tree density, the rubber tree girth and wood volume increased more slowly.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 049, Issue 5, Sep 15 - Oct 15, Page 785 - 794 |  PDF |  Page 

Img

ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Durian Sizing Machine)

ผู้เขียน:Imgดร.บัณฑิต จริโมภาส, ศาสตราจารย์, ImgPansak Siriratchatapong, ImgSupachart Sukharom, ImgSeksan Sihavong

สื่อสิ่งพิมพ์:pdf

Abstract

Durian sizing machine consists of chain conveyer, 32 durian holders (made of 3/8* circular steel shaft, 24 cm. wide by 55 cm. high), guide (made of 1/18* x 9/18* flat steel rod), locally-made electric weigher of 0-10 kg. range, microprocessor #8751 – control unit, sizing lamps and electronic sensors. Performance test based upon the standard given by Horticultural Research Institute, Department of Agriculture, Ministry of Agriculture and Agricultural Cooperatives resulted that the machine could well size the Chanee durian fruits with 17% error at the capacity of 1.35 ton/hr. while manual sizing was achieved at 43.3% error. Mechanical damage of durian was not found due to the sizing machine. Economic analysis indicated that the operating cost of the sizing machine is 1.43 baht/fruit when operating 8 hours a day, 20 days/year. Such cost would become 0.61 baht/fruit if the machine was operated upto 60 days/year.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 026, Issue 5, Jan 92 - Dec 92, Page 65 - 74 |  PDF |  Page 

Img

ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:เครื่องคัดขนาดมะม่วงด้วยระบบแปรรูปภาพ

ผู้เขียน:Imgดร.บัณฑิต จริโมภาส, ศาสตราจารย์, Imgนายพันธ์ศักดิ์ ศิริรัชตพงษ์, อาจารย์

สื่อสิ่งพิมพ์:pdf

Abstract

Development of mango sizing machine is based upon linear relationship between projected area and weight of mango. The machine comprises a portable TV camera taking a picture of moving mango by the control of the photocell. The picture will be scanned, white-pixel counted and compared with the number of white pixel of the standard size mango by 32 bit, 68008. Then, it will give signal to a solinoid mounted on the conveyor to tap the mango into the corresponding rotary bin. Sizing maching testing exhibited sizing capacity of 1 ton per hour at the efficiency of sizing 89.77% with ignorable mechanical damage. The machine could size mango (Namdoug Mai No.4) into 4 grades (Extra-fruit weight >360 gm., No. 1-fruit weight 310.1 to 360 gm., No.2-fruit weight 250.1 to 310 gm. and No.3-fruit weight 200 to 250 gm.) at belt speed 37.8 cm/sec.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 025, Issue 3, Jul 91 - Sep 91, Page 333 - 344 |  PDF |  Page 

Img

Researcher

ดร. ธนูชัย กองแก้ว, ผู้ช่วยศาสตราจารย์

ที่ทำงาน:ภาควิชาปฐพีวิทยา คณะเกษตร บางเขน

สาขาที่สนใจ:ความอุดมสมบูรณ์ของดิน, Soil Fertility, Soil Conservation

Resume

Img