Zech, Arthur Conrad Cold Resistance in Three Varieties of Winter Wheat as Related to Nitrogen Fractions, Total Sugar and Optical Density of Diluted Cell Sap
![Zech, Arthur Conrad Cold Resistance in Three Varieties of Winter Wheat as Related to Nitrogen Fractions, Total Sugar and Optical Density of Diluted Cell Sap](https://r.kelkoo.com/resize.php?country=se&merchantId=100565793&categoryId=5101&trackingId=96964074&width=300&height=300&image=https%3A%2F%2Fm.media-amazon.com%2Fimages%2FI%2F41y9SeCOU4L._SL500_.jpg&sign=RYREnXS7q1lmhWT5OdCYf5dFWt.OxGleMc7HL6mPzQk-)
Cold Resistance in Three Varieties of Winter Wheat as Related to Nitrogen Fractions, Total Sugar and Optical Density of Diluted Cell Sap