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Indian Journal of Agricultural Research, volume 34 issue 1 (march 2000) : 17-22

STUDIES ON APPLE YIELD FORECASTING ON THE BASIS OF BUD EXAMINATION

Shashi Kumar, R.P. Awasthi

Affiliations

¹Department of Pornology Dr. Y.S. Parmar University of Horticulture & Forestry, Nauni-173 230, India

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Cite article:- Kumar Shashi, Awasthi R.P. (2024). STUDIES ON APPLE YIELD FORECASTING ON THE BASIS OF BUD EXAMINATION. Indian Journal of Agricultural Research. 34(1): 17-22. doi: .

ABSTRACT

Studies were conducted on yield forecasting of apple, grown at 2000 (L3) m amsl in Himachal Pradesh during 1994 to 1996. Yield was found to increase with increase in elevation. The proportion of reproductive buds was studies on five different categories viz., on short terminals (S1), branched spurs (S2), spurs having fruit in previous seasons (S3), solitary swollen spurs (S4) and pointed buds (S5). The floral bud proportion increased with increasing altitude. S4 was found to be the potential fruiting category irrespective of location. Yield predicting models were selected through Principal Component (PC) and Ordinary least square (OL5) regression analysis. PC regression gave better estimates. Reproductive bud proportions (R2 and R4) on branched (S2) and solitary swollen spurs (S4) were found to be significant explanatory variables for yield at L1 and L2. At L3, R3 i.e. reproductive bud proportion on S3 was also important. The forecasting performance of the selected regression lines was ranked ‘good’.

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STUDIES ON APPLE YIELD FORECASTING ON THE BASIS OF BUD EXAMINATION

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