;NA&gt; &lt;NA&gt; &lt;NA&gt;    2
## 6   SlopeD  3.0    2    1 &lt;NA&gt; &lt;NA&gt; &lt;NA&gt;    1</code></pre>
<p>If an input land unit has terrain with slope of 1 degree, then according to <code>BANANATerrain</code> crop requirement, the land unit is <em>highly suitable</em> (S1) for farming banana. In this example, the suitability score is the 1 degree slope, since this is the statistics of the land unit directly compared to the intervals of the suitability classes provided in <code>BANANATerrain</cod