低产田土是当前发展“两高一优”农业的主要障碍,也是各地普遍存在而又亟待解决的突出问题。低产田土的特点是酸、碱、粘、沙、冷、瘦、荒,由此导致上壤耕性差、作物生长慢、单位产最低、经济收益少。这种情况在老、少、边、穷的丘陵山区更为明显和严重。因此,推广应用其改造的实用技术,很有必要。酸性土:一是施朋石灰中和酸性,头年亩 Low-yielding land is the main obstacle to the development of “two highs and one superiority” agriculture at present and is also a prominent issue that is ubiquitous and urgent to be solved everywhere. Low-yielding soil is characterized by acid, alkali, sticky, sand, cold, thin, shortage, resulting in poor soil cultivation, slow crop growth, the lowest per unit output, less economic returns. This situation is more obvious and serious in the old, less, the edge of the poor hills and mountains. Therefore, it is necessary to popularize and apply practical techniques for its transformation. Acid soil: First Shi Shi lime and acidic, the first year of mu