The field experiments were carried out at College of Agriculture Farm Rewa and Regional Agricultural Research Station, Kuthulia on Vertic haplurtalfs Soils, during rabi 1981-82, to study the influence of planting dates on Phenology and heat unit relationships under late sown conditions. The wheat cultivar sonalika was planted on 15 Dec., 23 Dec, 31 Dec. 1981 and 7th Jan. 82 at R.A.R.S., Kuthulia and on 16 Dec, 23 Dec, 30 Dec. 1981 and 6 Jan. 82 at College of Agriculture Farm. The results indicated that the requirement of accumulated heat units decreased with delayed planting. Besides growing degree days a unit incorporated the bright sunshine hours is also utilized (H.T.U.). A phenothermal index was also introduced (the AHU per growth day). It was nearly constant irrespective of planting dates and sites. The heat use efficiency decreased from 16.29 to 12.56 X 10"-* q/ha/GDD in case of D, to D4 respectively. A regression for predicting the maturity date for wheat crop using heat units accumulated upto flowering initiation for the Vindhyan region of Central India is developed.
: The present investigation was carried out to determine the suitable and optimum concentration of boron and plant growth regulators for maximum productivity and quality of guava cv. during Kharif season. From the present study it can be concluded that the treatment T 10 (0.2% boron + GA 3 60 ppm+ NAA 150 ppm + ethrel 750 ppm) was found best for physical parameters and treatment T 5 (0.2% boron + NAA 150 ppm) for yield point of view, while for quality point of view the treatment T 9 (0.2% boron + ethrel 1000 ppm) was found best. As far as the relative economics of the treatment is concerned, the maximum net realization of Rs. 1,72,807 per hectare with highest 1:6.6 cost benefit ratio (CBR) was obtained by the treatment T 5 (0.2% boron + NAA 150 ppm) as compared to other treatments. Therefore, the treatment T 5 (0.2% boron + NAA 150 ppm) is best among all treatment for higher production.
SUMMARY :The present investigation was carried out to study the response of different chemical treatment on shelf-life and quality of tomato fruits. The fruit samples were drawn and analysed periodically for various physical and bio-chemical changes. In summer results revealed that tomato fruits treated with post harvest treatments of KMnO 4 + BLE reduce ripening and gave maximum marketable fruits with increased shelf-life of tomato fruits. The minimum loss in weight was noted when tomato fruits treated with 2 per cent bael leaf extract. The fruits treated with KMnO 4 3000 ppm + 2 per cent BLE increased the per cent marketable fruits with increase in storage period. Maximum shelf-life (10 days) was observed in fruits treated with KMnO 4 2000 ppm + 2 per cent BLE and KMnO 4 2000 ppm alone. Maximum acidity was recorded in T 1 with 2 per cent bael leaf extract. Ascorbic acid content was highest with the post harvest application of GA 3 400 ppm in combination with 2 per cent bael leaf extract. The fruits treated with GA 3 increases TSS, reducing sugar and total sugar at initial and later stage of storage, but acidity was increased at later stage of storage. Maximum percentage of reducing and total sugar was recorded in control condition.
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