✦ LIBER ✦

Effect of Long-Term Potassium Fertilization on Crop Yield and Potassium Efficiency and Balance Under Wheat-Maize Rotation in China

✍ Scribed by Hui-Min ZHANG; Xue-Yun YANG; Xin-Hua HE; Ming-Gang XU; Shao-Min HUANG; Hua LIU; Bo-Ren WANG

No coin nor oath required. For personal study only.

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