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  1. No Access

    Chapter and Conference Paper

    The Status of Microelements in Relation to Crop Production in Paddy Soils of China: III. Zinc

    Zinc deficiency is the most common problem in paddy soils. Since the disorder was reported, it has become recognized as an important and widespread problem(l). In China, zinc deficiency is also found and it di...

    Zhu Qi-qing, Liu Zheng in Proceedings of Symposium on Paddy Soils (1981)

  2. No Access

    Chapter and Conference Paper

    The Status of Microelements in Relation to Crop Production in Paddy Soils of China: I. Boron

    The paddy soils are a kind special cultivated soils, Their chemical characteristics are radically different from those of normal upland soils. Some nutrients are moblized and translocated, while others remain ...

    Liu Zheng, Zhu Qi-qing in Proceedings of Symposium on Paddy Soils (1981)