论文部分内容阅读
一看土壤颜色。肥土土色较深,而瘦土土色浅。二看土层深浅。肥土土层一般都大于20厘米,瘦土相对较浅。三看土壤适耕性。肥土土层疏松,易于耕作。瘦土土质黏犁,耕作费力。四看土壤淀浆性及裂纹。肥土不易淀浆,土壤裂纹多而小;瘦土极易淀浆,易板结,土壤裂纹少而大。五看土壤保水能力。水分下渗慢,灌一次水可保持6-7天的为肥土地;不下渗或沿裂纹很快下渗的为瘦土。六看水质。水滑腻、黏脚,日照或脚踩时冒大气泡的为肥土;水质清淡无色,水田不起泡,或气泡小而易散的为瘦土
A look at soil color. Soil darker soil color, while the soil is light earth color. Second, see the depth of soil. Soil and soil are generally greater than 20 cm, relatively shallow soil. Third, see soil adaptability. Soil loose soil, easy to cultivate. Thin clay soil plow, farming laborious. Fourth, see soil slurry and cracks. Soil is not easy to slurry soil, soil cracks more small and small; very easy to cast leatland soil, easy to knot, small and large soil cracks. Five to see soil water retention capacity. Water infiltration slow, irrigation water can be maintained for 6-7 days for the fertile land; no infiltration or rapid infiltration along the crack for the lean soil. Six to see the water quality. Watery, sticky feet, sunshine or foot stool when the big bubble for the soil; light and colorless water, paddy fields are not blistering, or bubble small and easy to scattered for the lean soil