rightclick.json

{
	"block_pools" :
	[
		{
			"name": "Seeds from Dirt",
			"type":
			{
				"type": "block",
				"name": "minecraft:dirt"
			},
			"clicktype": "rightclick",
			"properties":
			[
				{
					"type": "require_sneak"
				},
				{
					"type": "per_block_limit",
					"id": "scavenge_seedfromdirt",
					"max": 16,
					"replacement": {
						"name": "minecraft:stone",
						"meta": 0
					}
				}
			],
			"drops":
			[
				{
					"name": "minecraft:wheat_seeds"
				}
			]
		}
	]
}