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Evaluation of different methods of crop regulation in guava grown under rainfed plateau conditions of eastern India

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Title Evaluation of different methods of crop regulation in guava grown under rainfed plateau conditions of eastern India
 
Creator Bikash Das, Vishal Nath*, B.R. Jana, S. Kumar and P. Dey
 
Subject Guava, crop regulation, foliar spray, deblossoming
 
Description Guava is an important fru it crop which is successfully grown over a wide range of climatic
conditions due to its wide adaptability. The Chotanagpur region of eastern plateau and hills agroclimatic
zone has been a traditional guava growing region where the crop is mostly grown under rainfed
conditions. Being a drought hardy, precocious bearing crop with medium size canopy, it provides a suitable
option to be grown as a filler crop under the fruit based multitier cropping system recommended for the rainfed uplands of Eastern plateau and hill agro-ecological zone for improving the land use efficiency. However, poor soil fertility coupled with low water holding capacity of soil of guava orchards of the region results in smaller sized guava fruits obtained from the region, which fetches lower market price than that obtained from other traditionally guava growing areas like Uttar Pradesh and West Bengal. Different methods of crop regulation have been successfully demonstrated for improving the yield and fruit quality of guava. Reduction of crop load of rainy season crop through foli ar application of different crop regulating chemicals like urea (Rajput et al., 6; Singh et al., 9, 1 O; Sahay and Kumar, 7), 2,4-D (Kumar and Hoda, 3), potassium iodide (Narayana et al., 4), NAA (Choudhury et al., 1) to increase the yield and quality of winter season crop have been successfully standardized for different agro-climatic zone. However, no such work has been reported under the rainfed conditions of sub-humid subtropical plateau conditions of eastern India. Manual deblossoming of flowers for rainy season crop for enhancement of winter season guava which does not involve any external input other than human labour, has also been found effective by different workers (Kumar and Hoda, 3; Singh et al., 11 ). Singh et al. (8) reported economic feasibility of crop regulation in guava through foliar application of urea under Lucknow conditions. Keeping this in view, the investigations were carried out to evaluate the efficacy of chemical and manual m.ethods of crop regulation of guava grown under rainfed plateau conditions of eastern India in terms of yield and profitability.
In Allahabad Safeda guava, foliar application of NAA (200 ppm) resulted in maximum yield of winter season
crop. With respect to the profitability of crop regulation through chemical spray the net profit was the maximum in case of 2,4-0 (40 ppm) followed by 2,4-0 (60 ppm), NAA (200 ppm) and NAA (100 ppm). In case of Lucknow-49, the maximum increase in yield of winter season crop was observed in case of foliar application of NAA (200 ppm). With respect to profitability of crop regulation, the maximum net profit per plant due to crop regulation, it was the ·maximum in case of NAA (200 ppm). With respect to crop regulation through hand deblossoming in guava cv.Allahabad Safeda, removal of 50% rainy season crop was at par with that in case of 100% crop removal with respect to yield of winter season crop during both the years. Profitability of crop regulation through manual removal of rainy season crop indicated maximum net profit in case of 50% removal of rainy season crop during both the years. In case of Lucknow-49, the maximum total yield was observed in case of 50% crop removal. With respect to profitability of crop regulation, the maximum net profit with sufficient yield was obtained in case of 50% crop removal.
 
Date 2019-10-22T07:15:42Z
2019-10-22T07:15:42Z
2007-09-01
 
Type Research Paper
 
Identifier Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/23808
 
Language English
 
Publisher Indian Journal of Horticulture