1. Impact of different levels of shade on yield and yield attributes of rice was studied at Ludhiana, which revealed that maximum reduction in yield (0.8 t ha-1) was observed when shade imposed during 30-60 DAT and nitrogen was 100% normally applied. Harvest index, biomass, 1000 grain weight and panicle weight (m-2) also showed similar response.
2. Weather based thumb rule models for potential yield of rice and wheat in Punjab were developed.
3. Assessment of the impact of elevated temperature regimes on phenology, growth and yield of cultivars of wheat, rice and mungbean was done at Ludhiana.
4. Effect of elevated temperature regimes on phenology, growth and yield of rice cultivars was studied at Ludhiana using temperature gradient tunnel. It was observed that high temperature shortened the crop duration over ambient temperature, which ultimately resulted in lesser crop yield. Under different elevated temperature regimes, viz., +4.5, +5.0, +5.3 and +5.8 °C, cv PR-122 was most tolerant and cv. PR-126 was most susceptible to increase in temperature, among the five cultivars studied.
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