A. If this is for an active and ongoing vegetable plot, I would suggest a soil test first, which will tell you what the pH is, what your plot requires to grow most vegetables, and how to bring the soil in balance (mainly whether to add lime or sulphur). It will also suggest which (and how much) fertilizer you should apply. Those familiar "N/P/K" letters you see on all fertilizer bags stand for nitrogen, which fuels leafy growth; phosphorus, for root and flower development to achieve a high yield of crop; and potassium (the "K"), necessary for healthy plants.
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机译：答：如果这是针对活跃且持续进行的蔬菜田，我建议先进行土壤测试，该测试将告诉您pH值，您的田地种植大多数蔬菜所需的条件以及如何使土壤保持平衡（主要是添加石灰或硫磺）。它还会建议您应使用哪种（以及多少）肥料。您在所有肥料袋上看到的熟悉的“ N / P / K”字母代表氮，氮可助长叶茂盛;磷，用于根和花发育，以实现高产;和钾（“ K”），是健康植物必需的。
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