Standardization of Diagnosis and Recommendation Integrated System of mango (Mangifera indica L.) cv. Dashehari under Jammu Sub tropics

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Date
2021-02
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Sher-e-Kashmir University of Agricultural Sciences and Technology Jammu, J&K
Abstract
The present investigation entitled “Standardization of Diagnosis and Recommendation Integrated system of Mango (Mangifera indica L.) cv. Dashehari under Jammu sub tropics” was carried out in Jammu division including two locations at Akhnoor and Samba.Total fifty orchards were selected, among these orchards twenty eight were selected from Akhnoor area and twenty two were selected from Samba area. Soil samples were collected from three soil depths 0-30 cm, 30-60 cm and 60-90 cm. The soil samples were analyzed for various physico- chemical properties and nutrient status. Leaf and fruit samples were also collected from the same orchards and analyzed for nutrient content, quality parameters and yield. In the surface and sub-surfaces depth, pH varied from 6.24 to 7.8, 6.30 to 7.82 and 6.33 to 7.83 with mean values of 6.97, 7.02, and 7.05. The EC ranged from 0.05 to 0.27, 0.04 to 0.25 and 0.03 to 0.24 dS m-1 with mean values 0.15, 0.13 and 0.12 dS m-1 in the surface and sub-surface depths. The respective contents of organic carbon in surface and sub- surfaces depth ranged from 0.21 to 2.30, 0.18 to 2.25 and 0.15 to 0.28 per cent with mean values of 0.99, 0.93 and 0.89 per cent. The soil pH was nearly neutral in reaction and showed an increasing trend with depth, while electrical and organic contents decreased with the increase in soil depth. From the surface and sub-surface soil layers the available macro nutrient nitrogen ranged from (107.10-298.26), (75.60-282.63) and (57.80-280.15) kg ha-1, available phosphorus ranged from (7.60-22.90), (6.90-20.00) and (6.20-18.42) kg ha-1 and available potassium ranged from (95.10-224.23), (90.00-217.19) and (79.34-210.00) kg ha-1 available sulphur ranged from (12.60-19.74), (10.40-17.90) and (9.80-16.95) kg ha-1 available calcium ranged from (4.02-6.35), (4.00-6.32) (4.00-6.29) [c mol (p+) kg ] -1available magnesium ranged from (2.18-3.32), (2.16-3.28) (2.14-3.28) [c mol (p+) kg]-1 From the surface and sub-surface layers of soild available micro-nutrient zinc ranged from (0.52-1.04 ppm), (90.50-0.97 ppm) and (0.48-0.95 ppm), available iron ranged from (11.48-21.75 ppm), (11.10-20.94 ppm) and (10.99-20.75 ppm), available copper ranged from (0.90-1,65 ppm), and (0.80-1.63 ppm) and available manganese ranged from (4.15- 22.25 ppm), (4.00- 20.98 ppm) and (3.92- 20.89 ppm) respectively. The leaf nutrient content ranged for nitrogen 1.10-2.25 %, 0.09-0.25% for phosphorus, 0.19- 0.45 % for leaf potassium, 0.04-0.29 % for sulphur, 1.8-2.45 % for calcium, 0.42-1.01 % for leaf magnesium, 10.6-28.5 ppm for zinc, 101.2-310.5 ppm leaf iron, (10.5-24.7 ppm copper and 69.9-193.9 ppm leaf manganese. The fruit weight ranged from 139.98-171.03 g, fruit length 9.05-10.45 g, fruit diameter 5.00-6.17 cm, fruit volume 138.90-170.00 cm3, specific gravity 1.006-1.008, pulp weight 87.05-109.80 g, stone weight 26.32-31.1 g, pulp: stone ratio 3.23-3.55, and fruit yield 30.50-84.69 kg/ plant, Whereas, the chemical characteristics of fruits such as total soluble solids ranged from 17.11-20.17 0Brix, titrable acidity 0.21-0.28 %, total soluble solids : acid ratio 66.55-82.19, ascorbic acid 35.59-41.82 mg/100g, total sugars 12.58-15.27%, reducing sugar 2.95-3.98 % and non- reducing sugar 9.63-11.29 %, respectively. The relationship of soil pH of the surface layer 0-30 cm was significantly and positively correlated with available magnesium and available copper. For the sub- surface layer 30-60 cm the soil pH was found to be positively and significantly correlated with available copper. A positive and significant correlation of electrical conductivity with available soil calcium, magnesium, and copper was recorded from the different soil depths (0-30, 30-60 and 60-90 cm). The organic carbon content in the surface soil 0-30 cm was found to be significantly and positively correlated with available soil nitrogen, phosphorus, calcium, magnesium, zinc, copper and manganese. For the sub- surface layers 30-60 and 60-90 cm it was found to be positively and significantly correlated with available nitrogen, phosphorus, calcium, magnesium and copper. Soil pH in the sub- surface layer 60-90 cm exhibited positive and significant correlation with leaf nitrogen, phosphorus, sulphur, zinc and manganese. The correlation of soil electrical conductivity and organic carbon with leaf N, P, K, S, Ca, Mg, Zn, Fe, Cu and Mn were found non- significant from the surface and sub- surfaces soil depths. The correlation studies between available nutrient elements in soil with their respective contents in leaves from the three layers of soil depth. The correlation of available phosphorus with leaf nitrogen exhibited negative but significant from sub- surface layers, 30-60 and 60-90cm, whereas, it was non significant at soil surface layer 0-30 cm. A positive and highly significant correlation of fruit weight, fruit length, fruit diameter, fruit volume, specific gravity, pulp weight, pulp: stone ratio and yield was observed with all leaf nutrients (N, P, K, S, Ca, Mg, Zn, Fe, and Mn). The relationship of total soluble solids, titrable acidity and ascorbic acid, total sugars, reducing sugar and non- reducing sugar with leaf nitrogen, phosphorus, potassium, sulphur, calcium, magnesium, zinc, iron, copper and manganese were found to be highly significant and having positive correlation at Akhnoor. DRIS approach diagnosed 10, 18, 8, 30, 14, 2, 2, 12, 2,0 per cent orchards as having major relative deficiency for N, P, K, S, Ca, Mg, Zn, Fe, Cu and Mn, respectively while as sufficiency range approach identified 16, 2, 0,18,12,0, 8, 20, 12 and 14 per cent of the orchards deficient for N, P, K, Ca, Mg, Zn, Fe, Cu and Mn, respectively. The DRIS approach diagnosed 2, 6, 4, 16, 18, 0, 6, 4, 40 and 4 per cent as the major relative excess for N,P, K, S, Ca, Mg, Zn, Fe, Cu and Mn whereas sufficiency range approach diagnose none of the orchard is in excess. DRIS approach diagnosed sulphur as most deficient nutrient followed by phosphorus calcium, iron, nitrogen, potassium, magnesium, zinc, copper and manganese.
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Preferred for your work DIAGNOSIS AND RECOMMENDATION INTEGRATED SYSTEM (DRIS) OF MANGO IN JAMMU PROVINCE ,INDIA.
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