: Drought is a natural hazard that has significant impact on economic, agricultural, environmental and social aspects.The main objective of the research reported herein has been to develop an approach to analyse of meteorological droughts based on annual precipitation data.If 'A' is the mean weekly rainfall for 22 years of data from 1991 to 2012, then a week receiving rainfall less than 75 per cent of 'A' valueis defined as drought week and greater than 125 per cent of 'A' valueis defined as surplus week. Week having rainfall between 75 per cent of 'A' value and 125 per cent of 'A' value is considered as normal week. The rainfall distribution of Latur and Osmanabad district of Maharashtra state is quite erratic in space and occurrence of drought is common.In this study 22 years of rainfall data of Latur and Osmanabad district have been analyzed on yearly, monthly and weekly basis for predicting the water drought, normal and surplus event for crop planning in region. Weekly drought, normal and surplus events give a more precise idea about crop planning than yearly and monthly events. The analysis has reveals that the percentage of drought weeks is more than normal and surplus weeks. It has been also reveals that there is a need of supplemental irrigation during periods of water scarcity.
Hybrids and cultivars of single type tuberose was evaluated to fulfill the need to develop new hybrids as demanded by commercial growers. Evaluation of fifteen genotypes showed significant variation in growth, floral and bulb characters. Cultivar Arka Prajwal was significantly superior over all genotypes, which recorded least number of days for opening of 1st floret (78.55 days) with maximum diameter of spike (1.18 cm), length of floret (6.05 cm), weight of individual floret (3.12 g) and weight of spike (121.43 g).The hybrid genotype L1P4 (Variegated X Phule Rajani) was observed to be superior in terms of rachis length (39.78 cm), inter-nodal length (7.25 cm), length of bulb (8.09 cm), diameter of bulb (3.76 cm) and diameter of bulb-lets (1.85 cm). Among the hybrid genotypes L1P4 also recorded maximum plant height (116.39 cm), spike length (109.58 cm), weight of cut spike (105.08 g) and vase life (11.00 days). However, it was foundto be at par for number of florets per spike (57.25), length of floret (5.92 cm) and number of spikes per clump (10.14) with all other cultivars and hybrids tested. From the overall performance, it was found that the cultivar Arka Prajwal was the best. Genotype L1P4 found promising for loose as well as cut flower production because of its number of florets, inter-nodal length and spikes per clump which are important characters considering loose flower for taking maximum number of pickings. However, characters such as rachis length, spike length, vase life and weight of spike which are imperative for cut flowers are also noted superior in genotype L1P4.
Water balance study is carried out to determine the weekly evapotranspiration, irrigation required and available useful rainfall. Daily rainfall data was collected from Metrological Department, Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani. Daily rainfall were converted to weekly rainfall. Daily reference crop evapotranspiration values were estimated by Penman-Monteith method with help of DSS_ET software. The weekly water requirement and weekly effective rainfall gives an idea about irrigation required. The Pomegranate evapotranspiration in Ambia bahar is more as compare to Mrig and Hast bahar. It observe that supplemental irrigation required in Mrig bahar is highest followed by Hast and Ambia bahar. Rainfall contribution to the Pomegranate evapotranspiration is maximum for Ambia Bahar than Mrig and Hast bahar. number of water deficit weeks maximum in Mrig bahar followed by Ambia and Hast bahar.
SUMMARY :The rainfall distribution of Aurangabad district of Maharashtra state is quite erratic in space and occurrence of drought is common. In this study 21 years of rainfall data of Aurangabad district have been analyzed on yearly, monthly and weekly basis for predicting the water drought, normal and surplus events for crop planning in the region. Weekly drought normal and surplus events give a more precise idea about crop planning than yearly and monthly events. The analysis has revealed that the percentage of drought weeks was more than normal and surplus weeks. It has been also revealed that there is a need of assured supplemental irrigation facility in Rabi and summer season crops.
The rainfall distribution of Parbhani district of Maharashtra state is quite erratic in space and occurrence of drought is common. In this study, 21 years (1991-2011) of rainfall data of Parbhani have been analyzed on yearly, monthly and weekly basis for predicting the water drought, normal and surplus events for crop planning in the region. Weekly drought normal and surplus events give a more precise idea about crop planning. The analysis has revealed that the assessment of drought on weekly basis is very important for better crop planning particularly in rainfed area. As analysis base period decreases the percentage of drought increases subsequently from year to month and from month to week. It has been also reveals that there is a need of assured supplemental irrigation facility in Rabi and summer season crops.
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