What components comprise the potato suitability index formula?

The correct answer is based on the components that accurately reflect the factors influencing potato cultivation suitability. The potato suitability index formula incorporates WET (water availability or wetness), AHOR (a measure of soil horizon), TEX (texture, which includes the proportions of sand, silt, and clay), along with organic matter content (OM) and pH levels.

These elements are critical in assessing soil conditions for potato growth. WET indicates how moisture retention affects plant growth, while AHOR represents the specific soil characteristics relevant to potato roots. Soil texture (TEX) determines drainage and aeration capabilities, which are essential for root health. Organic matter (OM) contributes vital nutrients and improves soil structure, and pH levels determine nutrient availability as well.

Collectively, these components provide a comprehensive evaluation of soil conditions vital for successful potato production. The other options lack one or more of these essential components, making them less suitable for accurately determining soil suitability for potatoes.