Hardpan can be a problem in farming and gardening by impeding drainage of water and restricting the growth of plant roots. In these situations, the hardpan can be broken up by either mechanical means such as digging or plowing, [3] or through the use of soil amendments.

A plow pan is a subsurface horizon or soil layer having a high bulk density and a lower total porosity than the soil directly above or below it as a result of pressure applied by normal tillage operations, such as plows, discs, and other tillage implements. Plow pans may also be called pressure pans, tillage pans, or traffic pans.

2022年6月15日 · Plowpans restrict root penetration and nutrient uptake, increase erosion by reduction of water percolation, and are both poorly drained and more susceptible to drought. The plowpan is a physical feature within a soil that took years to slowly create and will take years to remove. Surface compaction vs subsoil compaction

2011年11月30日 · The morphology, water-physical properties, and spatial distribution of plowpans were studied. The presence of a plowpan in the root layer is most reliably detected from the macro- and micromorphometric indices and a reliable decrease in the interaggregate porosity and in the range of active moisture.

A relatively thin, but highly compressed soil layer at the depth of tillage (e.g., 8-25 cm), largely the result of driving tractor wheels in a furrow while plowing. A plowpan can dramatically reduce vertical root penetration, water percolation, internal gas exchange and subsequent crop growth; sandy loam soil textures are particularly susceptible.

Abstract—The morphology, waterphysical properties, and spatial distribution of plowpans were studied. The presence of a plowpan in the root layer is most reliably detected from the macro and micromorphomet ric indices and a reliable decrease in the interaggregate porosity and in the range of active moisture.

Plough pans are more likely to form on the heavier types of soil. They can be broken up by using a subsoiler or by deeper ploughing. Pans may also be formed by the deposition of iron compounds, and sometimes humus, in layers in the soil or subsoil. These are often called chemical or iron pans and may be destroyed in the same way as plough pans.

2010年10月27日 · Results suggest that soils under the CT system developed a plough pan layer at about 20 cm depth that had 44% less total porosity as compared to surface conditions. It is shown that soils under the CT system tended to stay saturated for longer periods of time after each rainfall event.

2023年5月16日 · 位于耕作层（Ap1）以下较为紧实的土层。耕作表层（Ap）的一个亚层次。用符号Ap2表示。

plowpan 是什么意思，释义 -生物医药大词典