平原灌溉在农业上，当水以每英亩每加仑计数时，使田地保持水面就显得十分重要。西部农业区很多农民必须大量灌溉庄稼，因为年降雨量不足以维持许多作物生存。当田地不是水平时，要适当浸泡植物，所用的水比需要的多得多。这除了造成浪费外，还导致把肥料冲进河里，盐溶入... Plain Irrigation In agriculture, when the water is counted per acre per gallon, it is important to keep the field level. Many farmers in the western agricultural zone have to irrigate crops heavily because annual rainfall is not sufficient to sustain many crops. When the fields are not level, soak the plants properly and use much more water than you need. In addition to causing waste, it also caused the fertilizer to burst into the river and into the salt ...