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Dryland agriculture is entirely reliant on the monsoonal rainfall for its crop sensation. Pearl millet crop cultivation in a rainfed region like Madurai district Tamil Nadu became remunerative task, where the major rainfall contribution is from North-East monsoon. The influence of seasonal rainfall variability on pearl millet was quantified through correlating the inter-seasonal rainfall deviation with pearl millet productivity using the 30 years (1990-2019) rainfall and simulated pearl millet productivity data. Results indicated that pearl millet productivity had the relationship with seasonal rainfall by 46 percent. The research revealed that pearl millet crop yield dropped in nine out of 12 dry rainfall years and excess rainfall years also reduced the yield of pearl millet crop. It may well be implicit from the results that low and high rainfall years adversely affect the yield of pearl millet crop.

A field experiment was conducted during kharif-2017 at Agricultural College and Research Institute, Madurai in a factorial randomized block design. The present research was designed by nine treatment combinations considering three dates of sowing D1: II fortnight of June, D2 : I fortnight of July and D3 : II fortnight of July and three nitrogen levels N1: RDN (80 kg ha-1), N2 : 75% RDN (60 kg ha-1) and N3 : 125% RDN (100 kg ha-1) to study the growth and yield components of pearlmillet grown with variety CO (Cu) 10. The crop sown on I fortnight of July with 125 % RDN recorded maximum growth parameters, yield components and recorded significantly highest grain yield. The lowest was recorded in crop sown on II fortnight of July with application of 75% RDN.

Field experiments were conducted to study the effect of intercropping and integrated weed management practices on weeds experiment was conducted at Agricultural College and Research Institute, Madurai (Tamil Nadu) during winter 2013. The experiment was laid out in a split plot design and replicated thrice. The main plots were assigned with three cropping systems, viz. maize, maize + blackgram, maize + cowpea and six weed management practices, Application of pendimethalin at 0.75 kg/ha followed by one rotary hoeing on 35 DAS recorded the highest weed control efficiency (85.9) and reduced weed populations and weed dry matter production at 60 DAS. The maize + cowpea system resulted increased plant height, LAI and dry matter production of maize at 30, 60 and 90 DAS respectively. Application of pendimethalin at 0.75 kg/ha followed by one rotary hoeing on 35 DAS resulted in the highest grain and straw yield of maize 6.05 and 18.15 t/ha, respectively.

Induction and wave drag due to Alfven waves on long cylindrical satellite in ionosphere, investigating radiated power integral