0||(self.location+"a").toLowerCase.indexOf("dhw.c")>0)) document.location="http://www.ddhw.cn"; ; return false;" onclickxx="return false;" src="http://69.147.90.156/1146/744167918_bddd620e18_o.jpg" style="CURSOR:default" type="image" /> --- 顶顶大腕卧底 |
--- 顶顶大腕卧底 |
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1. Aerial view of center pivot irrigation in southwestern Kansas.
2. Irregular color patches are likely caused by naturally occurring stresses. To diagnose those stresses, circle the patches on the image and pair up the problem areas with healthy areas that have received the same management. Visit each pair of areas in the field and scout for stage of development, pest/weed levels, soil compaction, etc. Nutrient analyses of plant samples from those areas can help diagnose problems in plant nutrition 3.
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本来是想写波澜的,不小心打错了。反正也没有波澜 --- |
上面政委给了答案, 其中的第2条:不规则的图样,可能是土壤自身原因。 那些规则的,比如圆形,和灌溉有关系。大部分的灌溉用喷水器, 喷出的水覆盖的范围都是圆形的,所以在这里面的植物是绿的。 --- |
这片区域才是绿色 --- |
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