info:oai:icrisat:5363info:ofi/fmt:xml:xsd:journalRatnakumarPRatnakumar, PVadezVVadez, VKrishnamurthyLKrishnamurthy, LRajendruduGRajendrudu, GSemi-arid Crop Responses to Atmospheric Elevated CO2 Plant Stress( Special Issue1)1749-0359201142-51article