Best Soil for Gardening in Northern Mariana Islands

In Northern Mariana Islands, the most good growing ground is in Islands of Aguijan, Rota, Saipan and Tinian, Commonwealth of the Northern Mariana Islands, where 15% of the land rates Class I–II. Islands of Agrigan, Alamagan, Anatahan, Pagan, and Sarigan, Commonwealth of the Northern Mariana Islands is at the other end with 1%.

USDA grades every mapped soil into a land capability class from I to VIII, for growing crops without irrigation. Class I and II soils have few or moderate limitations: deep, workable, enough water. Classes III and IV can be farmed with care. Classes V through VIII are steep, stony, wet, shallow, or too dry, and are usually left to grass, range or woods.

We rank by the share of land in Class I–II. One thing to know: the grade includes rainfall. In dry states much of the land rates Class VI or VII simply because crops need watering there, so a watered garden on that ground can still do well. Look up your address for the pH, texture and water-holding that matter for a backyard bed.