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J. Harold Clark has written:

'Growth and composition of the strawberry plant as affected by source of nitrogen and pH value of the nutrient medium' -- subject(s): Strawberries, Nutrition, Composition, Growth

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9y ago
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9y ago

J. Harold Clarke has written:

'Getting started with rhododendrons and azaleas' -- subject(s): Azaleas, Rhododendrons, Varieties

'Growing berries and grapes at home' -- subject(s): Berries, Viticulture

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Q: What has the author J Harold Clark written?
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