by J. D. Helvey
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Input-output budgets of selected nutrien...
Grass seeding and soil erosion in a stee...
Flood frequency and culvert sizes needed...
Effects of defoliation by Douglas-fir tu...
Effects of a north central Washington wi...
Crop-water production functions and econ...
Leaf-mold for soil improvement in home g...
Growing winter wheat on poorly drained s...
Crop responses to water at different sta...
Proceedings of International Conference ...