Different crops have unlike nutrient requirements and different
soil types vary in their capacity to provide nutrients. Therefore,
we need to study the optimum requirement of nutrients for
particular crops on different soil types and in different agro
climatic conditions. Several methods of fertility management have
been proposed from time to time to maintain the soil fertility and
improve the crop productivity. Of late, the close association
between the nutrient status of leaves and yield of crop is
considered as one of the most important factor. Nutrient indices
are worked out in many crops to monitor the adequate and balanced
fertilization. DRIS not only helps to identify the nutrient(s) that
are deficient but also the order of their severity and requirement
is prioritized. This helps the farmer to know which nutrient should
be corrected first before attempting to correct the next deficient
nutrient through its application. Such an identification of
multiple nutrient deficiencies or imbalances is not possible
through the conventional methods. The present work will help to
understand and identify the nutritional imbalances in sunflower
through DRIS and work out the schedule.
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