DRIS Norms for Identifying Yield-Limiting Nutrients in Sapota (Manilkara achras (Mill). Fosberg) Cv. Cricketball

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....

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Autor principal:	K Anjaneyulu
Formato:	article
Lenguaje:	EN
Publicado:	Society for Promotion of Horticulture - Indian Institute of Horticultural Research 2007
Materias:	sapota index tissue nutrient norms dris nutritional balance index Plant culture SB1-1110
Acceso en línea:	https://doaj.org/article/aa28a4faddec45f09e530b92dd7f9bff
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spelling	oai:doaj.org-article:aa28a4faddec45f09e530b92dd7f9bff2021-12-02T15:17:43ZDRIS Norms for Identifying Yield-Limiting Nutrients in Sapota (Manilkara achras (Mill). Fosberg) Cv. Cricketball0973-354X2582-4899https://doaj.org/article/aa28a4faddec45f09e530b92dd7f9bff2007-12-01T00:00:00Zhttps://jhs.iihr.res.in/index.php/jhs/article/view/617https://doaj.org/toc/0973-354Xhttps://doaj.org/toc/2582-4899Diagnosis 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.K AnjaneyuluSociety for Promotion of Horticulture - Indian Institute of Horticultural Researcharticlesapotaindex tissuenutrient normsdrisnutritional balance indexPlant cultureSB1-1110ENJournal of Horticultural Sciences, Vol 2, Iss 2, Pp 115-118 (2007)
institution	DOAJ
collection	DOAJ
language	EN
topic	sapota index tissue nutrient norms dris nutritional balance index Plant culture SB1-1110
spellingShingle	sapota index tissue nutrient norms dris nutritional balance index Plant culture SB1-1110 K Anjaneyulu DRIS Norms for Identifying Yield-Limiting Nutrients in Sapota (Manilkara achras (Mill). Fosberg) Cv. Cricketball
description	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.
format	article
author	K Anjaneyulu
author_facet	K Anjaneyulu
author_sort	K Anjaneyulu
title	DRIS Norms for Identifying Yield-Limiting Nutrients in Sapota (Manilkara achras (Mill). Fosberg) Cv. Cricketball
title_short	DRIS Norms for Identifying Yield-Limiting Nutrients in Sapota (Manilkara achras (Mill). Fosberg) Cv. Cricketball
title_full	DRIS Norms for Identifying Yield-Limiting Nutrients in Sapota (Manilkara achras (Mill). Fosberg) Cv. Cricketball
title_fullStr	DRIS Norms for Identifying Yield-Limiting Nutrients in Sapota (Manilkara achras (Mill). Fosberg) Cv. Cricketball
title_full_unstemmed	DRIS Norms for Identifying Yield-Limiting Nutrients in Sapota (Manilkara achras (Mill). Fosberg) Cv. Cricketball
title_sort	dris norms for identifying yield-limiting nutrients in sapota (manilkara achras (mill). fosberg) cv. cricketball
publisher	Society for Promotion of Horticulture - Indian Institute of Horticultural Research
publishDate	2007
url	https://doaj.org/article/aa28a4faddec45f09e530b92dd7f9bff
work_keys_str_mv	AT kanjaneyulu drisnormsforidentifyingyieldlimitingnutrientsinsapotamanilkaraachrasmillfosbergcvcricketball
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DRIS Norms for Identifying Yield-Limiting Nutrients in Sapota (Manilkara achras (Mill). Fosberg) Cv. Cricketball

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