PROBLEM TO BE SOLVED: To provide a soil surface drying preventing material preventing soil from drying to enhance a water retaining function, easily usable only by being laid on the surface of soil without needing expertise, hardly scattering from the surface of soil, having a soil improving effect such as improving fertilizer holding ability, and excelling in environmental safety such as being returnable to soil as it is.SOLUTION: The soil surface drying preventing material includes: coarse organic matter that has water holding property fine grain organic matter that has water holding property a polymer gelling agent serving as an auxiliary water holding material and a clay mineral. The coarse organic matter with a longest diameter of 10-40 mm and the fine grain organic matter with a longest diameter of less than 4 mm are mixed to form voids that permit the internal flow and permeation of air and moisture (water vapor).COPYRIGHT: (C)2013,JPO&INPIT【課題】土の乾燥を防ぎ保水機能を高める土壌表面乾燥防止材であって、専門的な知識を必要とせず土表面に敷くだけで手軽に利用でき、また土表面から飛散しにくく、さらには保肥力を高めるなど土壌改良効果も有し、またそのまま土に返せる環境安全性にも優れる乾燥防止材を提供すること。【解決手段】保水性を有する粗大有機物と、保水性を有する細粒有機物と、補助保水材として高分子ゲル化剤と、粘土鉱物とを含む土壌表面乾燥防止材であって、最長径が10乃至40mmの粗大有機物と、最長径が4mm未満の細粒有機物との混合により、空気及び水分(水蒸気)の内部流通と透過を可能にする空隙が形成されていることを特徴とする、土壌表面乾燥防止材。【選択図】図1
