DETERMINATION OF DRIS REFERENCE NORMS FOR POMEGRANATE IN YAZD PROVINCE

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DARYASHENAS A.M.; DEHGHANI FARHAD

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Journal: Iranian Journal of Soil Research Year:2006 | Volume:20 | Issue:1 Page(s): 1-10

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Title

DETERMINATION OF DRIS REFERENCE NORMS FOR POMEGRANATE IN YAZD PROVINCE

Author(s)

DARYASHENAS A.M. | DEHGHANI FARHAD | Issue Writer Certificate

Keywords

DRISQ2

POMEGRANATEQ3

REFERENCE NORMSQ3

NUTRITIONAL STATUSQ3

FERTILIZERQ2

Abstract

Plant analysis is a useful tool in monitoring NUTRITIONAL STATUS, recommending FERTILIZER rates and types, and maximizing FERTILIZER efficiency, if the chemical analysis results are correctly interpreted. Diagnosis and recommendation integrated system (DRIS) approach is a comprehensive system which does not have limitations of the critical value approach (CVA) and sufficiency range approach (SRA). POMEGRANATE (Punica granatum L.) is one of Iran's commercial tree crops for which there is no sufficient data available for making FERTILIZER recommendations. In this investigation the amount of nutrients in leaf samples and yield from 151 POMEGRANATE orchards Throughout Yazd province were determined for two years (1996-98). According to the DRIS technique, the whole population was divided into two groups based on yield performance as high and low yielding sub-population with dividing line of 14 t ha-1 yields. The mean of each sub-population was calculated for various forms of expression. Variance ratios between yield of sub-population for all forms of expressions were calculated along with the coefficient of variation (CV). In order to select the best REFERENCE NORMS two factors were taken into account involving the largest of variance ratio (SB/SA) and the concentration of elements during growth stage. 45 REFERENCE NORMS were selected. DRIS indices for N, P, K, Ca, Mg, Fe, Mn, Zn and Cu were calculated using Quick Basic and Excel software. These REFERENCE NORMS as well as the DRIS indices are useful in determining nutritional problems of POMEGRANATE trees.

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APA: Copy

DARYASHENAS, A.M., & DEHGHANI, FARHAD. (2006). DETERMINATION OF DRIS REFERENCE NORMS FOR POMEGRANATE IN YAZD PROVINCE. IRANIAN JOURNAL OF SOIL AND WATERS SCIENCES, 20(1), 1-10. SID. https://sid.ir/paper/15930/en

Vancouver: Copy

DARYASHENAS A.M., DEHGHANI FARHAD. DETERMINATION OF DRIS REFERENCE NORMS FOR POMEGRANATE IN YAZD PROVINCE. IRANIAN JOURNAL OF SOIL AND WATERS SCIENCES[Internet]. 2006;20(1):1-10. Available from: https://sid.ir/paper/15930/en

IEEE: Copy

A.M. DARYASHENAS, and FARHAD DEHGHANI, “DETERMINATION OF DRIS REFERENCE NORMS FOR POMEGRANATE IN YAZD PROVINCE,” IRANIAN JOURNAL OF SOIL AND WATERS SCIENCES, vol. 20, no. 1, pp. 1–10, 2006, [Online]. Available: https://sid.ir/paper/15930/en

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