hardpan

简明释义

英[ˈhɑːdˌpæn]美[ˈhɑrdˌpæn]

n. 硬质地层；粘土层；最低点

英英释义

单词用法

同义词

反义词

例句

1.Prices have reached (the) hardpan.

物价已经降到了最低点。

2.The study provided the variation range of paddy field hardpan roughness and the effective frequency of the hydraulic copying system.

试验研究提供了水田沟底不平度变化范围以及可以实用的插秧机液压仿形系统的仿形频次。

3.For the need of earthquake microzonation some studies on the dynamic properties of hardpan in west Anhui were conducted.

本文结合地震小区划的需要对皖西硬粘土的动力特性进行了一些研究。

4.The limestone–and–clay and sand-and-clay soil over a hardpan and iron–dross subsoil allows excellent draining.

庄园粘土层上的石灰石泥和沙泥土以及心土钢渣形成了很好的排水。

5.The study provided the variation range of paddy field hardpan roughness and the effective frequency of the hydraulic copying system.

试验研究提供了水田沟底不平度变化范围以及可以实用的插秧机液压仿形系统的仿形频次。

6.When digging for a new garden, I hit a hardpan that made it difficult to break through the soil.

在挖掘一个新花园时，我碰到了一个硬土层，这使得打破土壤变得困难。

7.Farmers often need to use special tools to break up hardpan to improve soil aeration.

农民通常需要使用特殊工具来打破硬土层以改善土壤通气性。

8.The presence of hardpan can lead to poor root development in plants.

存在硬土层会导致植物根系发育不良。

9.The farmer discovered a layer of hardpan in his field, which prevented water from draining properly.

农民在他的田地里发现了一层硬土层，这阻碍了水的正常排出。

10.In areas with heavy clay soils, hardpan can form just below the surface.

在重粘土土壤区域，硬土层可能会形成在表面以下。

作文

In the realm of agriculture and soil science, understanding different soil types is crucial for successful farming. One such type is known as hardpan, which refers to a dense layer of soil that is often difficult for roots to penetrate. This layer can form due to various factors, including the compaction of soil particles over time, the accumulation of clay, or even the presence of cementing agents like iron or calcium carbonate. The implications of hardpan on agricultural practices are significant, as it can lead to poor drainage and reduced crop yields. Farmers must be aware of the presence of hardpan in their fields, as it can affect water retention and root development.When hardpan forms, it creates a barrier beneath the surface soil that prevents water from percolating downwards. This can result in waterlogging during periods of heavy rainfall, which can suffocate plant roots and lead to crop failure. Conversely, during dry spells, the hardpan can hinder moisture from reaching the deeper layers of soil, making it challenging for plants to access the water they need to thrive. Understanding the characteristics of hardpan is vital for developing effective soil management strategies.To address the challenges posed by hardpan, farmers often employ various techniques. One common method is deep tillage, which involves breaking up the compacted layer to improve soil structure and allow for better root penetration. Additionally, adding organic matter such as compost can help enhance soil aeration and reduce the density of the hardpan. Cover cropping is another strategy that can promote soil health and prevent the formation of hardpan by keeping the soil covered and protected from erosion.Moreover, understanding the formation of hardpan can help farmers make informed decisions about land use and crop selection. For instance, certain crops may be more tolerant of hardpan conditions, while others may struggle to establish themselves. By selecting the right crops and employing appropriate soil management practices, farmers can mitigate the negative effects of hardpan and improve their overall productivity.In conclusion, hardpan poses a significant challenge in agriculture, impacting water movement, root growth, and ultimately crop yields. Awareness and understanding of this phenomenon are essential for farmers seeking to optimize their land use and ensure sustainable agricultural practices. By implementing strategies to manage hardpan, farmers can improve soil health, enhance crop performance, and contribute to food security. The study of hardpan and its effects on soil dynamics will continue to be an important area of research as we strive to meet the growing demands of global agriculture.

在农业和土壤科学领域，理解不同的土壤类型对于成功的耕作至关重要。其中一种类型被称为硬盘层，指的是一种密实的土壤层，通常使根系难以穿透。这个层次可能是由于多种因素形成的，包括土壤颗粒随着时间的推移而压实、粘土的积累，甚至是铁或碳酸钙等胶结剂的存在。硬盘层对农业实践的影响是显著的，因为它可能导致排水不良和作物产量降低。农民必须意识到他们田地中硬盘层的存在，因为这会影响水分保持和根系发育。当硬盘层形成时，它在表层土壤下创建了一个屏障，阻止水分向下渗透。这可能导致在降雨量大的时期出现积水，从而窒息植物根系并导致作物失败。相反，在干旱期间，硬盘层可能阻碍水分到达土壤的深层，使植物难以获取所需的水分以茁壮成长。理解硬盘层的特征对于制定有效的土壤管理策略至关重要。为了应对硬盘层带来的挑战，农民通常采用各种技术。一种常见的方法是深耕，这涉及打破压实层，以改善土壤结构并允许更好的根系穿透。此外，添加有机物质如堆肥可以帮助增强土壤通气性，并减少硬盘层的密度。覆盖作物是另一种可以促进土壤健康并防止硬盘层形成的策略，通过保持土壤覆盖并保护免受侵蚀。此外，理解硬盘层的形成可以帮助农民做出明智的土地使用和作物选择决策。例如，某些作物可能对硬盘层条件更具耐受性，而其他作物可能难以建立。通过选择合适的作物和采用适当的土壤管理实践，农民可以减轻硬盘层的负面影响，提高整体生产力。总之，硬盘层在农业中构成了重大挑战，影响水分运动、根系生长，最终影响作物产量。对这一现象的认识和理解对于寻求优化土地使用和确保可持续农业实践的农民至关重要。通过实施管理硬盘层的策略，农民可以改善土壤健康、增强作物表现，并为粮食安全做出贡献。对硬盘层及其对土壤动态影响的研究将继续成为我们努力满足全球农业日益增长需求的重要领域。