Planting of summer-sown crops in India such as soybean, cotton, rice and corn has been delayed by at least two weeks because of the slow progress of monsoon rains in central and western parts of the country, raising concerns over lower production. Lower production of soybeans could force the country to raise imports of edible oils such as palm oil and soyoil, while a drop in cotton output could limit the world's biggest fibre producer's exports. Monsoon rains hit Kerala nearly a week later than normal earlier this month. Progress was slowed further last week because of Cyclone Vayu that drew moisture from the Arabian Sea.