Corn harvested in Luobei county, Heilongjiang province, last autumn has turned moldy as a result of excessive rain and snow in Northeast China, causing heavy losses for local farmers. Wang Kai / Xinhua

Excessive rain and snow in Northeast China - the country's main grain-growing area - has delayed spring plowing by about 10 days, with some doubting that the country will achieve yet another increase in its grain harvest this year.

By Wednesday, 66.323 million mu (4.4 million hectares) of farmland had been ploughed, accounting for only 40 percent of the planned acreage, Heilongjiang Daily reported on Thursday.

In the worst-case scenario, reduced grain production will drive up China's food prices, increase the inflation rate in the second half of the year, and cause food prices to surge in the global market, analysts said.

Provinces in Northeast China have been hit with excessive rain since last autumn. In Heilongjiang province alone, the rainfall volume from Sept 1 to Nov 1 reached 151 millimeters, 70 percent higher than the average amount in previous years.

By March 28, the average winter precipitation in Heilongjiang province stood at 53.2 millimeters, 109 percent higher than the historical average, a record in 50 years, according to the province's meteorological bureau.

Local government and media in Heilongjiang said that more than 5.3 million hectares of farmland was waterlogged, and conditions in 3.2 million hectares of land were "serious" in the province.

"We are two to three weeks behind the usual time to plow the land and plant the seeds," said Yu Zhiwen, a 59-year-old farmer in Suihua, Heilongjiang.

Yu runs a plot of farmland with less than 3 hectares. Water in his plot reaches his ankles, making it inaccessible to either machines or farmers.

"The pump does not work. All we can do is wait for the weather to warm up and for the water to evaporate," Yu said.

Yu has a family of five, and all of his household's income comes from the land. In previous years, the land could produce at least 7,500 kilograms of corn per hectare, but he only expects about half of that amount this year.