Soil constraints limit crop water and nutrient extraction and lead to yield loss globally. In rainfed agriculture, the selection of crop species more likely to yield well under constrained conditions is an important management tool. However, information on the most appropriate crops is often difficult to access due to its publication in a wide range of disparate sources and the various measures of crop tolerance used. This study aimed to improve our ability to identify crops for constrained areas in rainfed subtropical cropping systems by compiling published information that had assessed the grain yield response to acidic, saline, or sodic conditions of 17 cereal, pulse, and oilseed crops. This information was used to develop a 'traffic light' system for salinity and acidity to provide guidance on when soil pH or the electrical conductivity of a saturated soil extract (EC_e) is likely to be 'good', 'potentially limiting', or 'poor' for grain yield. Crops were also ranked according to their likely ability to yield well under saline, acidic, or sodic conditions. For all crops, the point at which grain yield was affected by soil constraints was variable and there was often only a small amount of published information available to help guide the identification of tolerance limits and rankings, particularly for sodicity. Many studies were also conducted under experimental conditions that differed from rainfed farming, which can affect the transferability of results. Confidence in the tolerance limits and rankings is thus only moderate and further work is required to confirm their applicability.

中文翻译：

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审查针对雨养亚热带作物种植系统常见的十七种谷类，豆类和油料作物的特定于酸度，盐度和盐度的作物特定耐受极限

土壤的限制限制了作物水分和养分的提取，并导致全球单产下降。在雨养农业中，在受限条件下选择更有可能获得良好收成的农作物是一种重要的管理工具。但是，由于最合适的农作物的信息在各种不同的来源中广泛使用，并且使用了多种农作物耐受性的测量方法，因此通常很难获得这些信息。这项研究旨在通过汇总已发布的信息来评估我们对17种谷类，豆类和油料作物的酸性，盐分或钠盐条件下的谷物产量响应的信息，从而提高我们在雨养亚热带作物种植系统的受限区域中识别作物的能力。这些信息被用来开发“交通灯”_e）谷物产量可能是“好”，“潜在限制”或“差”。还根据农作物在盐水，酸性或苏打条件下的良好收成能力对农作物进行排名。对于所有农作物而言，谷物产量受土壤限制影响的时间点是可变的，通常只有很少的公开信息可用于指导确定耐受限度和等级，特别是对糖度。在与雨养农业不同的实验条件下也进行了许多研究，这可能会影响结果的可传递性。因此，对公差极限和等级的信心只是中等，需要进一步的工作来确认其适用性。