The soil is very rocky, making planting of paddy rice difficult, so the land must be cleared to a depth of at least 20 centimeters. Though large stones can be dug up with heavy machinery, small stones have to be removed by hand as they are uncovered during plowing.
沈團長解釋，墾區中有些土質不好，而且地裡有許多大小石頭，會影響水稻的種植。為除去「石患」，大石用機械挖除、小石則在犁田時，靠人工揀除，至少要清到地表下二十公分。