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Diagram for experimental set-up for Randomized Completely Block Design (RCBD) with four replications in each legume species.
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This study aimed to evaluate the shading tolerance ability in moth bean (Vigna aconitifolia) in two experiments. In experiment 1, moth bean, Centrosema pascuorum cv. Cavalcade and Stylosanthes guianensis cv. Tha pra (Tha pra stylo) were grown under different sunlight shading levels by covering these plots with a black net. In Experiment 2, moth bea...
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... These stresses adversely affect the growth and yield of the plant and a lot of research is concentrated on minimizing their adverse effects and providing sustainable management strategies. For instance, the effect of shade tolerance on the growth characteristics of moth beans and two legume species were evaluated by Na Chiangmai et al. (2013). Similarly, the yield, growth and quality of pineapples exposed to various levels of chicken manure application was evaluated by Isuwan (2014). ...
Mealybugs pose a serious threat to fruit crops, by arresting plant growth and leading to premature 3 leaf and fruit drops which severely affects the yield as well as the quality. Primarily pest detection 4 is done with the help of human/animal scouting which is cumbersome and prone to error. This 5 paper studies the feasibility of using an electronic nose (E-Nose) for detecting mealybug 6 infestation in Khasi Mandarin orange plants. Plants normally release Volatile Organic Compounds 7 (VOCs) which can act as biomarkers for specific stress affecting the plant. These VOCs can be 8 analyzed to diagnose the plant. VOCs emanating from leaf samples of both infested and healthy 9 plants were analyzed using a custom-made E-Nose system containing an array of commercially 10 available gas sensors. Machine learning techniques like dimensionality reduction (PCA, LDA) and 11 optimized classification algorithms like Support Vector Classifier and random forest were 12 employed to check for the discriminating capability of the E-Nose system. The technique 13 successfully classified samples belonging to infested and healthy categories in both the classifiers 14 with accuracies of 95.66% and 96.7%.
... and observed that the decrease in interrow spacing increases grain yield. A study on the shading tolerance of moth bean (Vigna aconitifolia) intercropped with two species of tropical legume crops showed that shading reduced almost all growth characteristics, except plant height (Chiangmai et al., 2013). These results corroborate those found in the present study, as shown in Figure 3. ...
The intercropping of agricultural crops aims to increase the profitability and the sustainability of the production systems. The objective of this study was to evaluate the agroeconomic viability of the intercropping of grape with common bean grown at different planting densities and weed management. The experimental design adopted was randomized blocks in a split-plot scheme. Treatments in the plots consisted of weed managements, mowing and chemical, and, in the subplot, the intercropping of grape with 0, 4, 8 and 12 common bean plants/ linear meter. Grape-common bean intercropping and weed management did not influence the performance of grape crop. Regarding the agronomic characteristics of common bean, the highest values of plant height and yield were found with 8 and 12 plants/linear meter. Plant dry mass was higher when the common bean was intercropped with 4 plants, compared to 12 plants. For the agroeconomic indicators, land use efficiency index, monetary advantage and corrected monetary advantage, the best results were found with the intercropping with 8 bean plants, while the best results for gross income and net income were found under intercropping with 12 plants. Chemical and mowing weed managements can be recommended for the grape-common bean intercropping because they are efficient and do not affect the performance of the intercropped crops. The intercropping of grape with common bean is feasible because the gross and net income increase up to the density of 12 plants of common bean/linear meter and the intercropping with 8 plants/linear meter resulted in higher values of land use efficiency and monetary advantage.
... Generally the mean values of the parameters measured were found to be higher under the These results corroborate with the findings of [20,21] at Kerala Agricultural University, [22] and [23] at Bangladesh, [24] at Kyushu University, Japan, [25] at Phetchaburi, Thailand; [26] at Egypt and [27] at Japan; [28] in Thailand, which showed that plants grown under reduced light intensity had a higher plant height as compared to those under direct sunlight. Higher plant height under the shade could be due to a reduction in the rate of evaporation of the water from the soil providing cooler root zone leading to enhanced root development which probably led to higher plant height and also due to photosynthesis rate which may be proportional to chlorophyll content only at low light intensity. ...
... These results are in line with [22,30] who reported that shading reduced seed weight; [24], who indicated that shading treatment reduced total weight of all the cultivars involved. [25], who stated that shading, reduced dry weight. The results were contrary to those by [28] who reported that light reduction had no effect on seed weight. ...
... The increment was significant both at 75 percent light intensity (L 75 ) and 50 percent light intensity (L 50 ). Similar results that shading effect increased plant height were also reported in mungbean by Islam (1995), Bashir (2002) and Islam (1996); in mungbean and chickpea by Ali (1998), in garden pea by Akhter et al. (2009c), in all legumes by Chiangmai et al. (2013) and in soybean by Bakhshy et al. (2013). In a column, means followed by different letter(s) differed significantly by Tukey's test at P ≤ 5% level of probability. ...
... Islam (1995) in mungbean and Crookston et al. (1975) in dry bean also found decreased leaf number under shade condition. Similar result of decrease in leaf number due to shading was found in all legumes by Chiangmai et al. (2013). ...
... Rao and Mittra (1988), Marler et al. (1994) and Singh (1994) found lower leaf dry weight in legume crops under shade. Similar result was found in all legumes by Chiangmai et al. (2013). Araki et al. (2014) also found similar result in greengram. ...
An experiment was carried out to evaluate the leaf characteristics and yield performances of mungbean (Vigna radiata L.) under different light levels at the Crop Physiology and Ecology Research Field of Hajee Mohammad Danesh Science and Technology University, Dinajpur during March to June 2016. The experiment was laid out in a split plot design with three replications. Three light levels (L100 - 100 % light intensity, L75- 75 % light intensity and L50- 50% light intensity) were assigned in the main plots and four varieties (BARl Mung-6, BINA Mung-8, BINA Mung-5 and BU Mug-4) were assigned in subplots. Mosquito nets of different pore size were used for maintaining 75 and 50 percent light intensity. Leaf area was increased due to reduced light levels in all mugbean varieties but the increment was significant in BINA Mung-5 and BINA Mung-8 only at 75% light intensity at 40 days after sowing and only in BARI Mung-6 with L50 and BU Mug-4 with L75 and L50at 50 days after sowing. Due to reduced light levels, leaf dry weight was affected more in BINA Mung-5 and BU Mug- 4 than BARI Mung-6 and BINA Mung-8. Leaf thickness was reduced under shade in all the mungbean varieties, except in BU Mug-4 at 75% light intensity, and the reduction in leaf thickness was mainly due to the reduction in thickness of spongy layer. The palisade layer thickness was influenced insignificantly but spongy layer thickness was increased in BINA Mung-5 at 100% light intensity. The grain yields (t ha-1) of BARI Mung-6 and BINA Mung-8 remained stable under partial shade condition but the grain yield of BINA Mung-5 and BU Mug-4 was reduced drastically under partial shade condition. Higher leaf dry weight, number of pods plant-1, seeds pod-1, and heavier grains in BARI Mung-6 and BINA Mung-8 contributed to the higher grain yield plant-1 under partial shade condition than in BINA Mung-5 and BU Mug-4.The Agriculturists 2017; 15(2) 40-51
