Wild grains

Wild grains would be a (2 block height) new plant found in plains, sparse jungles, savannas, swamps and sometimes near rivers or lakes.

When broken, they would give “grain seeds” and if planted on farmland they would turn into corn, but if you place them in mud bellow water (1 block height), they would grow into rice.

Both corn and rice would be 2 block height too, but since the rice is placed inside a block of water, only one block is visible above water.