Plant Science: An Introduction to World Crops
W. H. Freeman, 1969 - Science - 629 pages
Blends the twin themes of plant science and crop agriculture into a single narrative. His broad reference use through its spectrum of pertinent data and principles derived from numerous principles.
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Crop Plants and World Affairs
Energy and Crop Production
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acid agricultural America amount animals annual areas become buds called cause cells chemical climates combination complete compounds contain continuous corn crop cultivated depends disease early effect energy essential example factors fertilizer fiber field FIGURE flower forest fruit function genetic germination grain growing grown growth harvested heat important increase industry involved irrigation Italy known land leaves less light living materials matter mature method minerals moisture natural nitrogen occur organic original percent period PLANT SCIENCE plants population possible practices present production protein radiation reduce referred regions relatively removed result root season seed selection soil species stem structure substances sugar supply surface temperature term tion tissue trees tropical United usually variety various vegetation weeds wild winter wood yield