Correct Option: D

Dapog method of rice nursery was developed in Philippines. The dapog method of raising seedling originated in the Philippines and is now, fairly common in South and Southeast. The dapog nursery is constructed for the raising of seedlings without any soil whatsoever. Rice seeds contain sufficient food in the endosperm to permit the young seedling to grow for up to 14 days without receiving any outside nutrients except air, water, and sunlight. Consequently, it is possible to nurse seedlings without actually sowing them in soil.