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Anjaneyulu, K.
- Diagnostic Soil Nutrient Standards and Identification of Yield Limiting Nutrients in Onion (Allium cepa) Using DRIS
Abstract Views :209 |
PDF Views:126
Authors
Affiliations
1 Division of Soil Science & Agricultural Chemistry, Indian Institute of Horticultural Research, Hessaraghatta lake post, Bangalore-560 089, IN
1 Division of Soil Science & Agricultural Chemistry, Indian Institute of Horticultural Research, Hessaraghatta lake post, Bangalore-560 089, IN
Source
Journal of Horticultural Sciences, Vol 3, No 1 (2008), Pagination: 39-42Abstract
Soil samples collected from a survey of fifty onion growing fields in Karnataka were analyzed for various macro and micronutrients for establishing a data bank to develop soil nutrient norms. By using Diagnosis and Recommendation Integrated System (DRIS), the whole population was divided into two sub-groups namely, low and high yielding and selected nutrient expressions that have shown higher variance and lower coefficient of variation as diagnostic norms, viz K/N (1.229), S/N (0.238), Ca/N (20.62), P/Zn (37.41), Mg/K (0.6.859), Fe/Mg (0.004), Fe/Zn (5.736) etc. In addition, five nutrient ranges have been derived using mean and standard deviation as low, deficient, optimum, high and excess for each nutrient to serve as a guide for diagnostic purpose. The optimum organic carbon ranged from 7.1 to 11.0 g kg-1, N from 115 to 178 mg kg-1, P from 26 to 38 mg kg-1 , K from 163 to 217 mg kg-1, Ca from 2199 to 3398 mg kg-1 , Mg from 802 to 1167 mg kg-1 and S from 34 to 43 mg kg-1. Among DTPA extractable micronutrients, the optimum iron ranged from 3.40 to 4.34 mg kg-1, manganese from 5.84 to 6.66 mg kg-1, zinc from 0.67 to 1.01 mg kg-1 and copper from 1.70 to 2.11 mg kg-1 for onion. The diagnosis of nutrient imbalance identified through DRIS indices indicated that organic carbon, phosphorus and zinc were the most common yield limiting nutrients in onion.Keywords
Nutrients, Norms, DRIS Indices, Onion.- Compositional Nutrient Diagnosis Norms (CND) for Guava (Psidium guajava L.)
Abstract Views :192 |
PDF Views:124
Authors
Affiliations
1 Division of Soil Science and Agricultural Chemistry, Indian Institute of Horticultural Research, Bangalore-560 089, IN
1 Division of Soil Science and Agricultural Chemistry, Indian Institute of Horticultural Research, Bangalore-560 089, IN
Source
Journal of Horticultural Sciences, Vol 3, No 2 (2008), Pagination: 132-135Abstract
Multivariate nutrient diagnostic norms were developed for guava using compositional nutrient diagnosis (CND) through leaf nutrient concentration vs. yield data bank. CND norms for N (VN), P (VP) and K (VK) were 2.48, 0.23 and 2.13, respectively. Norms for N and K were much higher compared to P, indicating higher requirement of these two nutrients. CND norms are multivariate norms that consider all elements, including unmeasured factors and, therefore, has higher diagnostic sensitivity. Among micronutrients, Fe requirement was much higher than all other nutrients. Interaction among different nutrients was explained by principal component analysis conducted on log-transformed data which produced four significant PCs, explaining about 73.66% of the variance. The four Eigen values added up to 8.1 denoting the four significant PCs. The first PC was positively correlated with P, Zn and R (residue, which is a reflection of dry matter accumulation in the plant) and negatively correlated with Ca, Mg, S and Fe, indicating that P and Zn behaved in one direction and the other elements in opposite direction. In the second PC, antagonistic effect of N, Fe with P and Cu was evident. In PC3, P and Mg were negatively correlated with Mn and Cu. In PC4, N and S showed their behaviour in the same direction. Diagnostic norms developed were used for identification of yield-limiting nutrients in low-yielding orchards. Thus, diagnostic norms and nutrient interactions help evolve nutrient management strategies for guava to realize higher yields and better quality.Keywords
Nutrients, Diagnosis, Norms, CND, PCA, Guava.- DRIS Norms for Identifying Yield-Limiting Nutrients in Sapota (Manilkara achras (Mill). Fosberg) Cv. Cricketball
Abstract Views :163 |
PDF Views:103
Authors
Affiliations
1 Division of Soil Science and Agricultural Chemistry, Indian Institute of Horticultural Research, Hessaraghatta Lake Post, Bangalore-560 089, IN
1 Division of Soil Science and Agricultural Chemistry, Indian Institute of Horticultural Research, Hessaraghatta Lake Post, Bangalore-560 089, IN
Source
Journal of Horticultural Sciences, Vol 2, No 2 (2007), Pagination: 115-118Abstract
Diagnosis and Recommendation Integrated System (DRIS) identified forty-five nutrient expressions as diagnostic norms from data colleted by surveying seventy-four sapota gardens in Karnataka and dividing the whole population into two sub-groups, namely, low and high yielding, during the year 2005-06. These expressions have shown higher variance and lower coefficient of variation found to have greater diagnostic precision, viz., N/K (0.989), Mg/N (0.264), N/Zn (0.117), Mg/K (0.258), Zn/K (8.609), S/Mg (0.666), Mg/Zn (0.031) etc. The Nutritional Balance Index indicated an overall imbalance of nutrients based on the sum of indices, irrespective of the sign. The diagnosis of nutrient imbalance through DRIS indices indicated that potassium, followed by nitrogen, was the most yieldlimiting nutrient among major nutrients and as were copper and zinc among micronutrients. In addition, five nutrient ranges were derived using mean and standard deviation as low, deficient, optimum, high and excess for each nutrient to serve as a guide for diagnostic purposes. Optimum N in the leaf ranged from 1.60 to 1.85%, P from 0.10 to 0.13%, K from 1.63 to 1.85%, Ca from 0.54 to 0.74%, Mg from 0.42 to 0.47% and S from 0.28 to 0.37%. Among micronutrients, optimum iron concentration in the leaf ranged from 113 to 161 ppm, Mn from 21-31 ppm, Zn from 14 to 17 ppm and Cu from 5 to 7 ppm for 'Criketball' variety of sapota.Keywords
Sapota, Index Tissue, Nutrient Norms, DRIS, Nutritional Balance Index.- Development of Leaf Nutrient Norms and Identification of Yield-Limiting Nutrients Using DRIS in Sapota cv. Kalipatti
Abstract Views :189 |
PDF Views:138
Authors
B. Savita
1,
K. Anjaneyulu
1
Affiliations
1 Division of Soil Science and Agricultural Chemistry, Indian Institute of Horticultural Research, Bangalore- 560 089, IN
1 Division of Soil Science and Agricultural Chemistry, Indian Institute of Horticultural Research, Bangalore- 560 089, IN
Source
Journal of Horticultural Sciences, Vol 3, No 2 (2008), Pagination: 136-140Abstract
A survey was conducted in 106 orchards growing sapota cv. Kalipatti in Raichur, Dharwad and Belgaum districts of Northern Karnataka for developing leaf nutrient norms through Diagnosis and Recommendation Integrated System (DRIS) for nutrient management. Leaf samples collected were processed and analyzed for macro-and micronutrient status and a data bank was established. The entire population was divided into two sub-groups, namely, low-and high-yielding types to derive the norms. Fifty-five nutrient expressions were chosen as diagnostic norms using DRIS, which have shown higher variance and lower coefficient of variation that are found to have greater diagnostic precision viz., N/K (1.731), N/Ca (0.928), Mg/N (0.360), Fe/N (99.89), N/Cu (0.104), N/B (0.037), Mg/Ca (0.329), Ca/B (0.040), Mg/S (1.103), Fe/Mg (278.6), Mg/Zn (0.037), Mg/B (0.013), Fe/Zn (10.39) etc. The nutritional balance index (NBI) indicated an overall imbalance of nutrients based on sum of the indices, irrespective of sign. Diagnosis of nutrient imbalance through DRIS indices indicated that potassium, boron and zinc to be the most common yield-limiting nutrients in the orchards. In addition, five nutrient ranges/standards were derived using mean and standard deviation as deficient, low, optimum, high and excess for each nutrient, to serve as a guide for diagnostics. Optimum leaf N ranged from 1.51 to 2.09%, P from 0.06 to 0.15% and K from 0.83 to 1.44%. The optimum concentration ranged from 1.36 to 2.34% for Ca, 0.54 to 0.68% for Mg and 0.48 to 0.80 for S. Among the micronutrients, optimum Fe, Mn, Zn, Cu and B concentrations ranged from 109 to 206 mg kg-1, 49 to 99 mg kg-1, 13.3 to 21.9 mg kg-1, 3.76 to 9.10 mg kg-1 and 34.8 to 66.8 mg kg-1, respectively, for sapota cv. Kalipatti.Keywords
DRIS, Norms, Indices, Nutrients, Sapota, Kalipatti.- Development of Diagnostic Leaf Nutrient Norms and Identification of Yield Limiting Nutrients Using DRIS in Rose Grown under Protected Conditions
Abstract Views :198 |
PDF Views:114
Authors
Affiliations
1 Division of Soil Science and Agricultural Chemistry, Indian Institute of Horticultural Research, Hessaraghatta Lake Post, Bangalore-560 089, IN
1 Division of Soil Science and Agricultural Chemistry, Indian Institute of Horticultural Research, Hessaraghatta Lake Post, Bangalore-560 089, IN