Yield and quality of grapes (cv. thompson seedless) in relation to soil fertility status of vineyards in Bijapur taluk of karnataka
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Date
2005
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Publisher
UAS, Dharwad
Abstract
Nutrient depletion has become more pronounced consequent to other exploitation of
natural resources to meet the food requirement in view of an ever-increasing population. It is
therefore important to examine the fertility status of soils from time to time. A systematic
investigation was conducted on soil fertility status of the low and high yielding vineyards in
Bijapur taluk. Sixty vineyards were surveyed during 2006-07. Out of 60, 30 vineyards were
selected based on previous year yield data for the purpose of collecting soil and petiole
samples. The vineyards which produced less than 10 tonnes per acre and those which
produced more than 10 tonnes per acre were categorised as low yielding and high yielding
vineyards, respectively.
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All the soils belong to clay in texture. The pH of soils was alkaline in reaction (8.19 –
8.50). The soils were non saline. The organic carbon content of the soils ranged from medium
to high. The CEC of the soil ranged from 49.45 to 59.48 cmol (p+) kg-1. The available
nitrogen content of the soils ranged from 164.20 to 231.71 kg ha-1. The available phosphorus
content in the soils ranged from 18.64 to 35.89 kg ha-1. The available potassium content of
the soil raged from 432.64 to 543.39 kg ha-1. The available sulphur content of the soils ranged
from 22.81 to 35.32 kg ha-1. The soils were optimum in available micronutrients. The
nutrients in the petiole were non-significant and positively correlated with yield except P and
K at 45 days after April pruning. The average cane girth after April pruning (vigour of vine)
was found more in case of high yielding vineyards than in low yielding vineyards. The
average girth of fruiting shoot was also more in high yielding vineyards. The better
management practices by the farmers ensure higher yields.
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Keywords
Plant Bio-Chemistry