Question 1: 'What is the slope of the land?'
   Why 'This is a key factor in detemining how much erosion occurs on the land'
   Answers  1 '0 - 3%'
            2 '3 - 8%'
            3 '8 - 15%'
            4 '15 - 25%'
            5 '25% and up'.

Question 2: 'What is the texture of the soil?'
   Why 'This is a key factor in determining water holding capacity, drainage, and natural fertility'
   Answers 1 'Clay'
           2 'Loam'
           3 'Sandy'.

Question 3: 'What is the drainage capacity of the soil?'
   Why 'Drainage effects the ability to sustain certain crops'
   Answers 1 'Well drained'
           2 'Moderately well drained'
           3 'Poorly drained'.

Question 4: 'What is the depth to bedrock?'
    Why ' '
    Answers 1 '0 - 20cm'
            2 '20 - 60cm'
            3 '60cm and up'.

Question 5: 'What percentage of the soil is rocky?'
    Why ' '
    Answers 1 '0 - 20%'
            2 '20 - 50%'
            3 '50% and up'.

Question 6: 'What is the degree of erosion?'
    Why 'This determines the current erosion status'
    Answers 1 'Light'
            2 'Moderate'
            3 'Severe'.

Question 7: 'Is there a fragipan present?'
    Why 'This tells about erosion, age of soil, and the amount of viable planting soil for the land'
    Answers 1 'Yes'
            2 'No'.

Question 8: 'What is the depth of the A horizon?'
    Why 'Gives information about the age of the soil and the amount of top soil'
    Answers 1 '0 - 3cm'
            2 '4 - 10cm'
            3 '11cm and up'.

Question 9: 'What is the average amount of railfall?'
     Why 'Gives an indication of the amount of runoff the site will experience'
     Answers 1 '0 - 30cm'
             2 '30 - 60cm'
             3 '60cm and up'.

Question 10: 'What is the ph of the soil?'
     Why 'Is an important factor relating to plant growth'
     Answers 1 '<5'
             2 '5 - 8'
             3 '>8'.

Question 11: 'What percentage of the land experiences rock outcrops?'
     Why 'To determine farming limitations'
     Answers 1 '0%'
             2 '0 - 20%'
             3 '20% and up'.

Question 12: 'What is the tilth of the soil?'
     Why 'It is a qualitative way to determine the workability of the soil'
     Answers 1 'Good'
             2 'Bad'.

Question 13: 'What is the annual corn yield per acre?'
     Why 'Describes the general productivity of the land'
     Answers 1 '<100 bushels per year'
             2 '>100 bushels per year'.


RULE 1: IF Q1A1 THEN D1.
RULE 2: IF Q1A2 THEN D2.
RULE 3: IF Q1A3 THEN D3.
RULE 4: IF Q1A4 THEN D4.
RULE 5: IF Q1A5 THEN D5.

RULE 6: IF D1 AND (Q2A1 OR Q2A3) THEN D2.
RULE 7: IF D2 AND (Q2A1 OR Q2A3) THEN D3.
RULE 8: IF D3 AND (Q2A1 OR Q2A3) THEN D4.
RULE 9: IF D4 AND (Q2A1 OR Q2A3) THEN D5.

RULE 10: IF D1 AND Q3A2 THEN D2.
RULE 11: IF D2 AND Q3A2 THEN D3.
RULE 12: IF D3 AND Q3A2 THEN D4.
RULE 13: IF D4 AND Q3A2 THEN D5.

RULE 14: IF D1 AND Q4A2 THEN D2.
RULE 15: IF D2 AND Q4A2 THEN D3.
RULE 16: IF D3 AND Q4A2 THEN D4.
RULE 17: IF D4 AND Q4A2 THEN D5.

RULE 18: IF D1 AND Q5A2 THEN D2.
RULE 19: IF D2 AND Q5A2 THEN D3.
RULE 20: IF D3 AND Q5A2 THEN D4.
RULE 21: IF D4 AND Q5A2 THEN D5.

RULE 22: IF D1 AND Q6A2 THEN D2.
RULE 23: IF D2 AND Q6A2 THEN D3.
RULE 24: IF D3 AND Q6A2 THEN D4.
RULE 25: IF D4 AND Q6A2 THEN D5.

RULE 26: IF D1 AND Q7A3 THEN D2.
RULE 27: IF D2 AND Q7A3 THEN D3.
RULE 28: IF D3 AND Q7A3 THEN D4.
RULE 29: IF D4 AND Q7A3 THEN D5.

RULE 30: IF D1 AND Q8A2 THEN D2.
RULE 31: IF (D2 AND Q8A2) OR (D1 AND Q8A1) THEN D3.
RULE 32: IF (D3 AND Q8A2) OR (D2 AND Q8A1) THEN D4.
RULE 33: IF (D4 AND Q8A2) OR (D3 AND Q8A1) THEN D5.

RULE 34: IF D1 AND Q9A3 THEN D2.
RULE 35: IF D2 AND Q9A3 THEN D3.
RULE 36: IF D3 AND Q9A3 THEN D4.
RULE 37: IF D4 AND Q9A3 THEN D5.

RULE 38: IF D1 AND (Q10A1 OR Q10A3) THEN D2.
RULE 39: IF D2 AND (Q10A1 OR Q10A3) THEN D3.
RULE 40: IF D3 AND (Q10A1 OR Q10A3) THEN D4.
RULE 41: IF D4 AND (Q10A1 OR Q10A3) THEN D5.

RULE 42: IF D1 AND Q11A2 THEN D2.
RULE 43: IF D2 AND Q11A2 THEN D3.
RULE 44: IF D3 AND Q11A2 THEN D4.
RULE 45: IF D4 AND Q11A2 THEN D5.

RULE 46: IF D3 AND Q13A3 THEN D28.
RULE 47: IF D4 AND Q13A3 THEN D38.

RULE 48: IF D3 AND Q12A1 THEN D28.
RULE 49: IF D4 AND Q12A1 THEN D38.

RULE 50: IF D1 AND Q12A1 THEN D11.

RULE 51: IF D2 AND (Q8A1 OR Q6A3) THEN D21.
RULE 52: IF D2 AND (Q5A2 OR Q5A3) THEN D22.
RULE 53: IF D2 AND (Q3A3 OR Q9A3) THEN D23.

RULE 54: IF D3 AND (Q8A1 OR Q6A3) THEN D31.
RULE 55: IF D3 AND (Q5A2 OR Q5A3) THEN D32.
RULE 56: IF D4 AND (Q3A3 OR Q9A3) THEN D33.

RULE 57: IF D4 AND (Q8A1 OR Q6A3) THEN D41.
RULE 58: IF D4 AND (Q5A2 OR Q5A3) THEN D42.
RULE 59: IF D4 AND (Q3A3 OR Q9A3) THEN D43.

RULE 60: IF (Q2A1 AND Q3A1) OR (Q2A3 AND Q3A3) THEN D99.

RULE 61: IF Q3A3 OR Q4A1 OR Q5A3 OR Q11A3 OR (Q4A2 AND Q7A1) OR Q9A1 THEN D5.


Dec 1: 'Possibly class I soil'.
Dec 11: 'Class I soil - Few limitations, wide latitude for use.  Very good land'.
Dec 2: 'Class II soil - Good land, moderate limitations'.
Dec 21: 'Class II soil - Moderate limitations due to erosion hazard'.
Dec 22: 'Class II soil - Moderate limitations due to rockiness'.
Dec 23: 'Class II soil - Moderate limitations due to wetness'.
Dec 28: 'Class II soil - Good land, moderate limitations'.
Dec 3: 'Class III soil - Severe limitations in use.  Regular cultivation possible if hazards are provided against'.
Dec 31: 'Class III soil - Severe limitations in use due to erosion hazard'.
Dec 32: 'Class III soil - Severe limitations in use due to rockiness'.
Dec 33: 'Class III soil - Severe limitations in use due to wetness'.
Dec 38: 'Class III soil - Severe limitations in use.  Regular cultivation possible if hazards are provided against'.
Dec 4: 'Class IV soil - Very severe limitations.  Suited for occasional cultivation or for some kind of limited cultivation'.
Dec 41: 'Class IV soil - Very severe limitations due to erosion'.
Dec 42: 'Class IV soil - Very severe limitations due to rockiness'.
Dec 43: 'Class IV soil - Very severe limitations due to wetness'.
Dec 5: 'This soil is not suited for agriculture'.
Dec 99: 'There is an inconsistency between soil texture and reported drainage, please recheck data'.