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The present investigation was undertaken on the effect of certain nutrients on fruit setting, fruit retention, physical characters and yield of ber fruit (Zizyphus mauritiana Lamk). c.v. Banarasi Karaka at main experiment station, Department of Horticulture, Narendra Deva University of Agriculture and Technology Kumarganj, Faizabad (U.P.) during the years 2008-2009. Plants received uniform cultural operations throughout the experimental period. Treatments included control, Ferrous sulphate (FeSO4) @ 0.3%, Ferrous sulphate @ 0.6%, Potassium sulphate (K2SO4) @ 1.0%, Potassium sulphate @ 2.0%, borax (Na2B4O7 10H2O ) @ 0.5%, borax @ 1.0%, (FeSO4 @ 0.3%+K2SO4 @ 1.0%+borax @ 0.5%, (FeSO4 @ 0.6%+K2SO4 @ 2.0%+borax @ 1.0%. The nutrients were sprayed as aqueous solutions using Tween-20 as a surfactant. First spray was done in month of September just before flowering and second spray was done after fruit setting. The results were found that the foliar spray of FeSO4 @ 0.6%, along with K2SO4 @ 2%, and borax @ 1.0%, proved most effective in recording maximum initial fruit setting, fruit retention, minimum fruit drop, and maximum length and breath, stone weight of fruit, pulp stone ratio and weight of fruit which contributed to maximum yield. The better fruit quality parameters viz. % of TSS, sugar, ascorbic acid, lowest acidity was also recorded with the application of the same treatment. [ABSTRACT FROM AUTHOR]

A field experiment was conducted to find out the effect of micronutrient on ber fruit quality during storage in cv. Banarasi Karaka under ambient condition, laid out at main experiment station department of horticulture, Narendra Deva University of Agriculture and Technology Kumarganj, Faizabad (U.P.) during the years 2008-2009. Plants received uniform cultural operations throughout the experimental period. Treatments included control, ferrous sulphate (FeSO4) @ 0.3%, ferrous sulphate @ 0.6%, potassium sulphate (K2SO4) @ 1.0%, potassium sulphate @ 2.0%, borax (Na2B4O7 10H2O) @ 0.5%, borax @ 1.0%, FeSO4 @ 0.3%+K2SO4 @ 1.0%+borax @ 0.5%, FeSO4 @ 0.6%)+K2SO4 @ 2.0%)+Borax @ 1.0%. The nutrients were sprayed as aqueous solutions using Tween-20 as a surfactant. First spray was done in month of September just before flowering and second spray was done after fruit setting. The result were found that the fruit quality with respect of highest TSS. sugar, ascorbic acid, lowest acidity was obtained with spray of FeSO4 @ 0.6%+K2SO4 @ 2.0%+borax @ 1.0% followed by treatment and consisting 0.3% ferrous sulphate+1.0% potassium sulphate+0.5% borax and FeSO4 @ 0.6%. While minimum physiological weigh loss was recorded (6.53%) with the treatment FeSO4 @ 2.0%+borax 1.0%+K2SO4 @ 2.0% followed by treatment borax @ 1.0%, minimum decay loss recorded 8.83% with the treatment borax @ 0.5% followed by treatment, FeSO4 @ 0.3%+K2SO4 @ 1.0%+borax @ 0.5%. [ABSTRACT FROM AUTHOR]