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: 1950-1960
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: Crop Rotation
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Clip Search: 1950-1960, Crop Rotation

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NIU Collection, Segment 5

SEGMENT: CHANGES IN FARMING METHODS, ACTIVITIES, & ORGANIZATIONS: Audio duration 08:19
Diversification to Specialization & Increased Use of Fertilizers: duration 01:43



NIU Collection, Segment 18

Agro-Chemicals, Crop Rotation, Cover Crops, & Wildlife: duration 00:46