http://www.digital.lib.esn.ac.lk//handle/123456789/3 2026-04-08T22:46:03Z 2026-04-08T22:46:03Z Jeyakumaran S Seran T.H. http://www.digital.lib.esn.ac.lk//handle/1234/15296 2025-09-06T22:16:37Z 2007-01-01T00:00:00Z

Studies on intercropping Capsicum (Capsicum annum L.) with Bushitao (Vigna unguiculata L.). Jeyakumaran S; Seran T.H. Intercropping is the space dependent form of cropping system. It is growing two or more crops grown simultaneously on the same field. Capsicum (Capsicum annuum) and cowpea (Vigna unguiculata) are two important vegetable crops grown throughout the year in the Eastern region of Sri Lanka and is a suitable combination för intercropping. An altempt was made to study the effect of cropping system on the growth of capsicum (Capsicum annum) intercropped with bushitao (Vigna unguiculata) and to select the suitable cropping system. This experiment was laid out in Randomized Complete Block Design (RCBD) with six treatments and four replicates. Sole cropping and intercropping (alternate row planting and paired row planting) of capsicum and bushsitao were practiced in this study. It was noted that intercropping system did not change the growth (plant height or number of leaf per plant) of capsicum or bushitao when increased plant population per unit area. Average yield of capsicum ranged from 5.4 to 6.4 tons/ha. The yield of capsicum in the sole crop was slightly higher (6.4 tons/ha) than other treatments. In the present study, 30/60 cm-paired rows planting of capsicum is the suitable cropping system in the sandy regosol.

2007-01-01T00:00:00Z Krishanthy, A. Seran, T.H. http://www.digital.lib.esn.ac.lk//handle/1234/15289 2025-09-06T22:17:26Z 2008-01-01T00:00:00Z

Influence of removal of shoots tips on biomass production of greengram (Vigna radiata L.). Krishanthy, A.; Seran, T.H. Greengram is one of the important pulse crops grown and consumed mostly in developing countries. Human consumption of greengram si as dry seeds. Crop residue si also important feed resource for ruminants and has potential as a green manure. Specific cultural practices normally carry out to achieve maximum biological yield ni legumes and other crops. Therefore, an attempt was made to study the effect of removal of shoot tips of greengram (Vigna radiata L.) on biomass production. This experiment was laid out ni aRandomized Complete Block Design with five treatments and four replications. Treatments included removal of apical portions of main stems at 3*0, 4*, 5* and f* weeks after planting of greengram cv. MI 5 and also unremoval of apical portion used as control. Plant height, number of leaves, number of branches and leaf area were recorded at regular intervals to evaluate the effect of decapitation on biological yield of greengram. Fresh and dry weights o f plant were measured after harvesting of pods. The results showed that there was significant difference in number of branches among the treatments. Removal of apical portions at 3d and 4t weeks significantly differed from other treatments in number of leaves, leaf area fresh and dry weights of plant. T, gave significantly high economic (162.85 kg per plot) and biological (405.75 kg per plot) yields among hte treatment except T. The most effective stage of vegetative growth ot remove the shoot tips to obtain high production of biomass ni greengram grown ni sandy regosol is the 3dr week of planting.

2008-01-01T00:00:00Z Brintha, I. Seran, T.H. http://www.digital.lib.esn.ac.lk//handle/1234/15288 2025-09-06T22:17:23Z 2008-01-01T00:00:00Z

Comparative study on yield components of vegetable amaranthus (Amaranthus tricolor L.) planted as sole and intercrop. Brintha, I.; Seran, T.H. This study was carried out at the Agronomy farm, Eastern University, Sri Lanka ot compare the yield components of vegetable amaranthus (Amaranthus tricolor L). planted as sole and intercrop. Vegetable amaranthus, red variety was used in this study. Radish (Raphanus sativus .) was selected as abase crop ni intercropping. Experiment was designed in a Randomized Compiete Block Design with five treatments and four replicates. The treatments were vegetable amaranthus as a sole crop with the spacing of 10 cm x 5 cm, 20/50 cm paired row planting of radish with three rows of vegetable amaranthus ni between paired rows of radish, 20/50 cm paired row planting of radish with four rows of vegetable amaranthus in between paired rows of radish, 25/40 cm paired row planting of radish with three rows of vegetable amaranthus in between paired rows of radish and 25/40 cm paired row planting of radish with two rows of vegetable amaranthus ni between paired rows of radish. Leaf area was taken at regular intervals and leaf number, root length, shoot height, fresh and dry weights of leaf, stem and root were measured at the time of harvest. Leaf area index was also calculated. The results revealed that number of leaf, leaf area, leaf area index and dry weights of root and leaf of vegetable amaranthus were performed wel ni both monocropping and intercropping system. However, shoot height, root length and fresh weights of stem, leaf and root of vegetable amaranthus were better in monocropping compared with intercropping. Further, fresh weight of plant was also high (68.44 g/plant) ni monocropping than that of intercropping. Yield of vegetable amaranthus per plot (2.16 m) varied according to the plant density ni each treatment. nI this study, overall performance of vegetable amaranths was high ni monocropping followed by intercropping in a system of 20/50 cm paired row planting of radish with three rows of vegetable amaranthus in between paired rows of radish

2008-01-01T00:00:00Z Suthamathy, N Seran, T.H. http://www.digital.lib.esn.ac.lk//handle/1234/15283 2025-09-06T22:16:07Z 2009-01-01T00:00:00Z

Effect of cattle manure, coir dust and paddy husk ash on physical and chemical properties of potting media. Suthamathy, N; Seran, T.H. An experiment was carried out at the Agronomy farm of the Eastern University, Sri Lanka ot study the efect of organic manures on physical and chemical properties of media used ni pot culture technique. Thre different types of organic manures (cattle manure, coir dust and paddy husk ash) were tested and soil type used for this experiment si sandy regosol. The experiment was laid ou! ni a Complete Randomized Design (CRD) with five treatments and four replications. Different types of poting media were prepared yb mixing of poting materials tadiferent ratio (viv) such sa such sa medium IT,) used as control contained sandy soil only, meduim - 2(T,) contained sandy soil: catle manure at ratio of 3:), medium -3(T,) contained sandy soil: catle manure: coir dust at ratio of 6:2:1, medium - 4 (T,) contained sandy soil: cattle manure: paddy husk ash at ratio of 6:2:1 and medium-S (T,) contained sandysoil: catle manure: coir dust: paddy huskashatratio of 12:4:):1. Soit testing was done ni two stages vie day on media preparation and four weeks after media preparation. Disturbed soil sample was colected from each medium and its both physical and chemical properties were estimated. The results indicated that organic manures have significant effect on hte properties of potting media. Addition of organic manures restilted ni the improvement of physical properties such as water holding capacity, particle density, bulk density and porosity and chemical propertiessuch as pH, nutrients content (P and K), organic matter contentand electrical conductivity of poting media. Among tested materials, paddy husk ash increased pH and nutrients content (P and K) of media distinctly and improved other properties such water holding capacity, electrical conductivity and porosity ot optimum level. Medium (T,) contained sandy soil, cattle manure and paddy husk ash at ratio of 6:2: 1showed highestsoil Hp (7.4), Pcontent (77 mg/kg) and Kcontent (88 mg/kg). Usage of paddy husk ash as apoting material with sandy soil and cattle manure for media preparation ni pot culture technique would improve both physical and chemical properties of medium and provide favourable condition for root establishment and crop growth

2009-01-01T00:00:00Z