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Registros recuperados: 7
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Effects of Tithonia diversifolia, farmyard manure and urea, and phosphate fertiliser application methods on maize yields in western Kenya JARTS
Opala, Peter Asbon; Kisinyo, Peter Oloo; Nyambati, Robert Orangi.
Maize production in western Kenya is often limited by deficiencies of nitrogen and phosphorus. We assessed the effectiveness of Tithonia diversifolia green manure (tithonia), farmyard manure (FYM) and urea as sources of nitrogen (N) for maize when inorganic phosphorus (P) fertiliser was either broadcast (BR) or spot-placed in the planting hole (SP) for two consecutive seasons; October to December of 1998 and April to August of 1999 at two sites; Nyabeda and Khwisero in western Kenya. A randomised complete block design with four replications was used. Maize yields were higher at Nyabeda and responded to P application better than at Khwisero. At the same N rate, tithonia and FYM were as effective as urea in increasing maize yields at both sites. There were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil Science integrated soil fertility management; Organic materials; Phosphorus availability; On-farm research.
Ano: 2015 URL: http://www.jarts.info/index.php/jarts/article/view/2015011347180
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Microbial enzymatic activity and thermal effect in a tropical soil treated with organic materials Scientia Agricola
Cenciani,Karina; Freitas,Sueli dos Santos; Critter,Silvana Auxiliadora Missola; Airoldi,Cláudio.
Bacteria and fungi are the most active decomposers of organic materials in soil. They directly affect plant nutrient availability, and chemical and physical properties of soils. This investigation aimed at quantifying the effect of several organic materials on microbial activity of a Rhodic Eutrudox. Soil samples were incubated over a period of 91 days with the following organic materials: cattle manure (CM), earthworm humus (HM), and city sewage sludge from Barueri (BA) and Franca (FR). The activities of cellulase, protease and urease enzymes, the soil microbial carbon content (by fumigation-extraction method) and the exothermal effect were evaluated. Experimental design was randomized and arranged as factorial scheme five treatments x seven samplings...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Enzymes; Biomass carbon; Organic materials; Soil microorganisms; Microcalorimetry.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000600016
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Vertical distribution of pico- and nano-sized Dapi yellow particles at Dyfamed time-series station, NW Mediterranean ArchiMer
Tanaka, T; Rassoulzadegan, F.
We measured. abundance and surface area of pico- and nano-sized organic particles that are stained by 4'6-diamidino-2-phenylindole (Dapi), namely Dapi yellow particles. This study was done monthly from April 1999 to March 2000 from surface down to 2000 m at the French-JGOFS time-series station Dyfamed in the NW Mediterranean. Dapi yellow particles were always observed throughout the water column and the total surface area of Dapi yellow particles 0.2-10 mum ranged from 0.5 to 51.5 mm(2) l(-1). Dapi yellow particles were generally less abundant in the surface layer, greater between 70 and 500 m and decreased toward 2000 m. During the mixing period, Dapi yellow particles were homogeneous throughout the upper 200 m, suggesting that distribution of Dapi yellow...
Tipo: Text Palavras-chave: Dapi yellow particles; Matériel organique; Détritus; Méditerranée occidentale; Dapi yellow particles; Organic materials; Detritus; Mediterranean Sea.
Ano: 2003 URL: http://archimer.ifremer.fr/doc/00322/43278/43010.pdf
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ชนิดของวัสดุอินทรีย์ที่เหมาะสมในการปรับปรุงดินเค็มเพื่อเพิ่มผลผลิตข้าวหอมอินทรีย์ Thai Agricultural
Ketsuda Dejbhimon; Duangsamorn Tulaphitak; Pahtanaporn Wongsongyot; Pornpis Chusorn.
In order to study appropriate kind of organic materials for improvement of salt-affected soil to increase yield of aromatic organic rice, the experiment was carried out in farmer’s field at Tumbon Bann Ped, Amphur Muang , Khon Kaen. The experiment designed was a Randomized Complete Block Design (RCBD) consisted of 8 treatmentswith 3 replications. The treatments were as follows: 1) no application of organic materials (control) 2) application of rice straw and Sesbania rostrata 3) application of rice husk and Sesbania rostrata 4) application of cow dung and Sesbania rostrata 5) application of rice straw, rice husk and Sesbania rostrata 6) application of rice straw, cow dung and Sesbania rostrata 7) application of rice husk, cow dung and Sesbania rostrata 8)...
Tipo: Collection Palavras-chave: Aromatic organic rice; Improvement of salt-affected soil; Organic materials; ข้าวหอมอินทรีย์; พื้นที่ดินเค็ม; ชนิดของวัสดุอินทรีย์ที่เหมาะสม; การปรับปรุงดินเค็ม; ผลผลิต.
Ano: 2013 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5574
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ผลของการไม่ไถพรวนและการใช้วัสดุอินทรีย์ต่อการเจริญเติบโต ผลผลิตและการสังเคราะห์ด้วยแสงของข้าวในสภาพดินเค็ม Thai Agricultural
Konkanok Phoudpho; Supasith Sithapanich; Wimonan Kanket; Pornthip Srimongkol; Chalermpol Kerdmani.
Tipo: Collection Palavras-chave: Rice; Photosynthesis; Saline soil; Organic materials; Tillage; ข้าว; การสังเคราะห์แสง; ดินเค็ม; วัสดุอินทรีย์; การไถพรวน; การเจริญเติบโต; ผลผลิต.
Ano: 2012 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5368
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ผลของระบบไม่ไถพรวนและวัสดุอินทรีย์ต่อการเปลี่ยนแปลงสมบัติทางเคมีของดินเค็มปลูกข้าว Thai Agricultural
Arissara Kaewpilarom; Wimolnan Kanket; Suphasit Sithapanich; Pornthip Srimongkol.
Soil salinity is a major problem in the use and management of agricultural in Thailand. Especially in the northeast, those have the lack of natural fertility. Many studies found that the use of organic material can reduce the salinity of the soil. The experiment was conducted with two organic materials, there are rice straw and sunn hemp incorporation with no-tillage system. Experimental design was a randomize complete block with 4 replicates comprised 6 treatments: 1) conventional tillage, 2) tillage with sunn hemp incorporation, 3) tillage with rice straw incorporation, 4) no-tillage, 5) no tillage with sunn hemp mulching and6) no tillage with rice straw mulching. Soil samples were collected in two peried of rice cultivation; before transplant and two...
Tipo: Collection Palavras-chave: Saline soil; Organic materials; Tillage; Chemical properties; ดินเค็ม; วัสดุอินทรีย์; การไถพรวน; สมบัติทางเคมีของดิน.
Ano: 2012 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5405
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ผลของวัสดุอินทรีย์และระบบการไม่ไถพรวนต่อการเปลี่ยนแปลงสมบัติทางเคมีของดินในนาข้าว Thai Agricultural
Puthipol Sirimool; Wimonan Kanket; Pornthip Srimongkol; Supasith Sithapanich.
Thailand is a country located on the tropical agriculture. Natural soil fertility is low. Low organic matter content. Due to the rapid degradation of the heat and humidity. Therefore,the concept adding of organic material and reduced tillage to improve soil properties for the better. The study on the effects of tillage systems on changes in soil chemical properties of rice. The experimental design was Randomize Complete Block Design (RCBD) 5 treatments. 1) tillage (control) 2) tillage with sunnhemp incorporation 3) tillage with rice straw incorporation 4) no tillage with sunn hemp mulching 5) no tillage with rice straw mulching. Soil samples were collected during the period, before transplant and 2 weeks after harvest. The soil reaction, electrical...
Tipo: PhysicalObject Palavras-chave: Rice; Saline soil; Photosynthesis; Organic materials; Tillage; ข้าว; ดินเค็ม; การสังเคราะห์แสง; วัสดุอินทรีย์; การไถพรวน; การเจริญเติบโต; ผลผลิต.
Ano: 2012 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5449
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