* Corn gains for fourth day as U.S. planting delays support
(Adds details Chinese demand, quote on paragraph 3)
* Wet weather in U.S. Midwest slows corn, soybean planting
* Soybeans gain 0.9%, market recovers from Friday's
* Wheat dips after 3 sessions of gains, set to close week
* Wheat hits highest since May 11 as Russia cuts crop
* Corn down 0.5% after three straight days of gains
(Adds comment in paragraph 3, updates prices)
MUMBAI/SINGAPORE Indian buyers have resumed purchases of Malaysian palm oil after a four-month gap following a diplomatic row, with buying spurred by a fall in domestic inventories and discounted prices, trade sources said.
* Strong Chinese demand, lower U.S. planting limit losses
(Recasts with soybean prices declining; adds details on
Brazilian exports, comment)
* China looks to build reserves via state-owned, private
SINGAPORE/BEIJING China has asked trading firms and food processors to boost inventories of grains and oilseeds as a possible second wave of coronavirus cases and worsening infection rates elsewhere raise concerns about global supply lines.