This paper presents an experimental lab designed for undergraduate students which focuses on soil science and chemistry. Students perform a series of tests to classify soil’s phosphate retaining characteristics, texture, pH, organic matter content, and permeability with the addition of a novel soil amendment, Al Mg biochar. This lab has minimal cost as most chemicals are inexpensive and a soil column is crafted from a used water bottle, filter paper, and masking tape. Students apply their measurements to understand how agriculture plays a role in ocean and watershed health and how soil-testing, soil amendments, and responsible farming practices can minimize agriculture’s footprint. It is important for agriculturally focused students to understand how soil chemistry relates to crop yields, and the importance of responsible agricultural practices. Learning outcomes and student attitudes from this experiment were assessed to evaluate the experiment.

中文翻译：

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土壤中的磷酸盐：对土壤质地，化学和修正的大学探索

本文介绍了一个针对本科生而设计的实验实验室，其重点是土壤科学和化学。学生们进行了一系列测试，对土壤的磷酸盐保持特性，质地，pH，有机物含量和渗透性进行了分类，并添加了新型土壤改良剂Al Mg生物炭。该实验室的成本最低，因为大多数化学药品价格便宜，并且土壤柱是由用过的水瓶，滤纸和胶带制成的。学生运用他们的测量结果来了解农业如何在海洋和流域健康中发挥作用，以及土壤测试，土壤改良剂和负责任的农业实践如何最大程度地减少农业的足迹。对于以农业为重点的学生来说，了解土壤化学与作物产量之间的关系以及负责任的农业实践的重要性非常重要。