Effect of planting time and density on plant growth, seed yield and quality attributes in onion (Allium cepa) cv. Pusa Riddhi

The present experiment was conducted to investigate the effect of planting time and density on plant growth, seed yield and quality attributes in onion (Allium cepa L.) cv. Pusa Riddhi at SPU, IARI, New Delhi during rabi 2013-14 and 2014-15. The experiment consists of three different planting dates, i.e. 15 October (T1), 25 October (T2) and 5 November (T3) with three spacings, viz. 60×10 cm (S1) 60×20 cm (S2) 60×30 cm (S3). The experimental results revealed that the date of planting and plant spacing had significant influence on growth attributes, flowering, yield and quality characters. The planting on 15 October (T1) showed significant higher, seed scape height (101.4 cm), umbel diameter (6.54 cm), productive umbellates/umbel (414.73), seed setting (83.69%), seed yield/plant (8.71 g) and yield/ ha (6.86 q), germination (%) (88.43), seedling length (9.48 cm), seedling dry weight (1.9 mg) and vigour index-I and II (8.33.32 and 167.08) than 25 October and 5 November planting. The plant spacing 60×30cm (S3) showed higher number of leaves/plant (40.89) seed scape height (102.26 cm), scape diameter (1.88 cm), total scapes/plant (11.72), umbel diameter (6.58 cm), productive scapes/plant (8.35), umbellates/umbel (503.52), productive umbellates/umbel (419.4), yield/umbel (3.48 g), seed yield/plant (12.43 g), seed yield/ha (6.22 q), 1000 seed weight (3.01 g), germination (%) (89.76) and seed vigour-I and II (918.56 and 172.96) than closer spacing. The incidence of disease, disease severity index and scape lodging (%) were significantly lower in 15 October (T1) and 60×30 (S3)

“I felt like I was missing out on something”: An evaluation of using remote technology in the classroom

As technology develops in Higher Education (HE), distance learning has adopted many different guises and supports many different needs (Keane 2013). The purpose of this study was to evaluate the use of Double Robotics on a Doctoral (level 8) postgraduate course at a HE institution. The aim of this project was to generate an understanding of student and tutor experiences more generally, while examining the feasibility and impact of Double Robotics within a doctoral programme more specifically. Data were collected through a series of focus group interviews with the student and tutors over the course of a single semester (10-weeks). The data were subject to an inductive thematic analysis (Braun and Clarke 2006, 2013). The findings of the study shed light on the interactive pitfalls of the technology and contribute to understanding the experiences of distance learners’ engagement. Four key themes were identified: quality of technology, classroom familiarity, tutor facilitation and user isolation. The significance of this study lies not only in assessing the feasibility of Double Robotics but, specifically, shedding light on the nuanced understanding tutors require to enrol and engage distance learners remotely. Most notable, the ‘isolation’ of the learner points to a heightened awareness of context that can help tutors develop robust and durable environments, which embrace both traditional classroom settings and facilitate the addition of distance learners. Building upon Tucker (2013), technological advancements in the classroom must be carefully designed to appreciate the context of the learning environment, the teacher, and the pedagogic experiences of the learners

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Not AvailableThe purpose of this article is to present an algorithm to construct A-optimal balanced treatment incomplete block (BTIB) designs. A number of A-optimal BTIB designs are constructed in the parametric range The proposed algorithm is implemented using R language.Not Availabl

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Not AvailableA total of 5337 barley accessions were evaluated for a number of traits. The accessions included indigenous germplasm collected from various parts of India; exotics selected from trials and nurseries received from ICARDA/ CIMMYT, Mexico and ICARDA, Syria; as well as materials received from different countries over the last four decades. Out of the total accessions, 2801 were indigenous and 2536 exotic. Only 290 accessions were naked type, the rest were hulled. This paper summarizes results on classification and characterization of these accessions for various agro-morphological traits, associations among these traits, and frequency distribution and donors for days to heading, plant height and 1000-kernel weight.Not Availabl

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Not AvailableThis article proposes an algorithm to construct efficient balanced multi-level k-circulant supersaturated designs with m factors and n runs. The algorithm generates efficient balanced multi-level k-circulant supersaturated designs very fast. Using the proposed algorithm many balanced multi-level supersaturated designs are constructed and cataloged. A list of many optimal and near optimal, multi-level supersaturated designs is also provided for m60 and number of levels (q) 10. The algorithm can be used to generate two-level k-circulant supersaturated designs also and some large optimal two-level supersaturated designs are presented. An upper bound to the number of factors in a balanced multi-level supersaturated design such that no two columns are fully aliased is also provided.Not Availabl

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Not AvailableThis article proposes a new linear integer programming approach to obtain cyclic circular balanced and strongly balanced crossover designs for a given number of treatments v, number of periods p, and number of units n. The linear integer programming approach has been used for generating a sequence of treatments to be assigned to the units. Using this approach, cyclic circular balanced and strongly balanced crossover designs for v < 30, p < 5, and 4 or * 4 have been generated, where ( * ) refers to the number of times each treatment is preceded by every other treatment excluding itself (including itself) depending on whether it is circular balanced or circular strongly balanced. The designs obtained are uniform over periods. A catalogue of designs for v < 30, p < 5, 4 or * 4, p < v with n 100 is given. The designs obtained are universally optimal over the class of all connected designs with a fixed number of treatments, number of periods, and number of sequences.Not Availabl