驳船
发表于 2025-3-23 10:02:24
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山间窄路
发表于 2025-3-23 17:33:08
Vincent S. L. Cheung,Howard C. Luongion with the International Fertilizer Development Center (IFDC). Results show that crop needs for N, P, and S depend on the plant characteristics, climatic and edaphic factors. In Saria, at the northern tip of the Sudan zone, application of 30 kgN/ha, 13.2 kg P/ha and 25 kg K/ha produced the highest
友好
发表于 2025-3-23 18:45:39
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悠然
发表于 2025-3-23 22:22:55
Design and Power Considerations,agricultural production in the Gambia. A lot of the early work on soil fertility and fertilizers was on cash crops. Recent studies by the Ministry of Agriculture and by such agencies as the FAO have emphasized on-farm research on food crops. Collaborative research with the International Fertilizer D
Conquest
发表于 2025-3-24 02:41:29
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装勇敢地做
发表于 2025-3-24 06:35:33
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嘴唇可修剪
发表于 2025-3-24 13:49:46
B. Milner,V. Rapoport,L. Yevenkols in Liberia are highly leached and acidic Ultisols. Nitrogen and phosphorus, in that order, are the two most limiting nutrients in these soils which are dominated by 1.1 lattice clays. Many of the earliest trials showed that crops responded positively to the use of fertilizers. However, little or
巨头
发表于 2025-3-24 16:48:31
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Aspirin
发表于 2025-3-24 22:09:04
B. Milner,V. Rapoport,L. Yevenkothese nutrients are needed in the soils. While confirming the widespread deficiencies of N and P, the trials also showed that only moderate amounts of N and P are required to overcome these deficiencies and satisfy crop needs. Nitrogen fertilizers applied at rates of 80 kg/ha should be split applied
PANEL
发表于 2025-3-25 01:31:56
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