通过方差分析和回归性分析表明，不同林地之间有机碳、速效磷和速效钾质量分数差异性显著（P<0.05）且与土层厚度有明显相关性，并随土层深度的增加呈规律性变化。

And there is a significant correlation between the mass content of available P and soil depth (P<0.05) and the mass percentage of available P is verified regularly with the increasing of soil depth.

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对于当地居民，清理林地种植玉米或养牛短期就可见到效益，而墨西哥最富有的居民和50%生活在贫困中的居民之间贫富差距巨大。

For the locals, there is short-term gain in clearing forest land to grow corn or raise cattle, and there is a huge gap between Mexico's richest citizens and the 50 percent who live in poverty.

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黑腿蜱虫大多存活于浓密的树林区域（占全部抽样的67%）和群落交错区（22%）。 群落交错区是指林地与开阔地带之间的过渡区域。

The blacklegged tick is found mainly in densely wooded areas (67% of total sampled) and ecotone (22%), which is unmaintained transitional edge habitat between woodlands and open areas.

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