http://anchan.lib.ku.ac.th/agnet/handle/001/128 Search the Channel search http://anchan.lib.ku.ac.th/agnet/simple-search http://anchan.lib.ku.ac.th/agnet/handle/001/4692 Title: ผลของระยะปลูกที่มีต่อการเจริญเติบโตและผลผลิตในการผลิตเมล็ดพันธุ์ข้าวโพดฝักอ่อนลูกผสมเดี่ยวที่ไม่ต้องถอดยอดพันธุ์ KBSC 605; Effect of spacing on growth and seed yield in seed production of the non-detasselled baby corn single-cross hybrid KBSC 605<br/><br/>Authors: Supranee Ngamprasitthi; Chokekchai Aekatasanawan; Chamaiporn Aekatasanawan; Surapol Chowchong; Kingkan Panichnok<br/><br/>Abstract: Objective of this research was to study the effect of spacing on growth and seed yield in seed production of the non-detasseled baby corn single-cross hybrid KBSC 605. Five spacings were 75*10 cm (133,331 plants/ha), 75*12.5 cm (106,669 plants/ha), 75*15 cm (88,887 plants/ha), 75*17.5 cm (76,187 plants/ha) and 75*20 cm (66,669 plants/ha) were tested in randomized complete block design with four replications at the National Corn and Sorghum Research Center in the dry season (December 2008-April 2009). The male: female row ratio was 1: 4 by planting the female rows before the male rows five days. It was found that the 75*10 cm spacing gave the highest seed yield at 10 percent moisture content of 2,157.5 kg/ha different from the 75*20 cm (P LT 0.01). It had days to 50 percent anthesis of the male parent of 72.5 days, days to 50 percent silk of 73.5 days of the female parent. Moreover, It possessed shelling percentage of 87.3 percent, seed moisture content of 11.6 percent, 100 seed weight of 28.3 g and seed germination of 95.7 percent. The non-detasseling in the female rows of the seed production of KBSC 605 because of its male sterility reduced cost of the seed production. Fri, 01 Jan 2010 00:00:00 GMT http://anchan.lib.ku.ac.th/agnet/handle/001/4691 Title: การควบคุมวัชพืชด้วยสารกำจัดวัชพืชในไร่ข้าวโพดเกษตรกร ปี 2552; Weed control in field corn cultivation in 2009<br/><br/>Authors: Sodsai Changsaluk; Rungsit Suwanmonkha; Somchai Pothisan; Somchai Lim-aroom<br/><br/>Abstract: Experiment on pre-emergence and post-emergence herbicide application for weed control in farmer's field conducted in Ban Yangrak, Khokcharoen district, Lopburi province, during August-November 2008. The experiment laid out in RCB, composed of 10 treatments, with 3 replications. The objective of this experiment was to study on the efficiency of herbicides and their effect on field corn, KSX 4901 variety. The results revealed that weed found in the experiment were purple nutsedge (Cyperus rotundus), wild poinsettia (Euphorbia heterophylla), horse purslane (Portulaca oleracea), tropical spiderwort (Commelina benghalensis), running grass (Brachiaria reptans), and jungle rice (Echinichloa colona). The application of 2,4-D, glufosinate, fluroxypyr and paraquat as post-emergence herbicide gave better weed control than atrazine, the pre-emergence herbicide. Application of 2,4-D+paraguat gave as good weed control of 80 percent, as hand weeding of 87 percent. All herbicide treatments were not affect to corn yield, seed moisture content, shelling percentage, plant height and ear height. Yield of KSX 4901 from the experiment were 602-745 kg/rai. Fri, 01 Jan 2010 00:00:00 GMT http://anchan.lib.ku.ac.th/agnet/handle/001/4690 Title: การสกัดดีเอ็นเอจากข้าวโพดในระดับเล็กสำหรับทำพีซีอาร์; Maize DNA preparation in small-scale for PCR<br/><br/>Authors: Wanchai Yenpetch; Chaba Jampatong; Sanon Suksatan<br/><br/>Abstract: This method for instant DNA extraction from fresh corn leaf based on a simple DNA extraction with CTAB modified from Doyle and Doyle (1987) in small scale. After extraction steps, the extracted DNA was checked the quality and quantity by using a spectrophotometer to measure the absorbance at A260/A280. The result showed the feasibility of this method which was confirmed by using PCR method. The PCR product showed an expected band. Without the addition of the phenol or 2-beta-mercaptoethanol, this method could properly use in routine laboratory where DNA is used for PCR detection. In addition, this method requires less plant tissue to extract that is useful for other plant experiments. Fri, 01 Jan 2010 00:00:00 GMT http://anchan.lib.ku.ac.th/agnet/handle/001/4689 Title: การเลือกใช้เมล็ดพันธุ์ข้าวโพดกับผลตอบแทนที่เกษตรกรได้รับ: กรณีศึกษาอำเภอตากฟ้า จังหวัดนครสวรรค์ ปีการเพาะปลูก 2552; Corn seed utilization and return to farmers: A case study of Tak Fa district, Nakhon Sawan province, crop year 2009<br/><br/>Authors: Visit Limsombunchai; Sanit Kao-ian<br/><br/>Abstract: Objectives of this study were to investigate the cost and return to farmers on their corn production classified by varieties in Tak Fa district, Nakhon Sawan province in 2009 crop year. Out of 122 farm samples, 75, 13, 19 and 15 farms were found using variety A, B, C and others, respectively. The results showed that most of the farms had a similar production pattern. In addition, it was found that variety B had the highest cost of production, average yield, revenue and net profit (3,667.3 Baht/Rai 1,112.9 Kg./Rai 4,218.0 Baht/Rai and 550.7 Baht/Rai, respectively). Furthermore, the results indicated that variety C had the lowest yield risk while variety B had the lowest price risk. The study suggested that variety A was appropriate for the risk adverse farmer, where as variety B was suitable for the farmer who aimed to maximize net profit and could cope with the yield risk. Fri, 01 Jan 2010 00:00:00 GMT