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: 1940-1950
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: Crop Rotation
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Clip Search: 1940-1950, Crop Rotation, Manure

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NIU Collection, Segment 5

Diversification to Specialization & Increased Use of Fertilizers: duration 01:43



LPL Interviews K-Z, Segment 8

SEGMENT: FARMING METHODS & HEALTH: Video duration 07:50
Crop Rotation & Compost: duration 00:38