块茎作物

Those problems include Reduceing resistance ,reduceing the power expend,avoiding intertwist,advanceing the machine performance in glutinous soil,strengthening planting and machine standardization ,deveioping united harvest.

目前我国块茎类经济作物机械化收获面临的主要技术难题是：解决减阻、降耗、防堵问题；提高可见率，减少漏收损失和损伤率[1～2]；加强块茎类作物种植规范化，收获机具标准化。1减少机具阻力问题当前

Potato is a kind of potassium crop, which has great demand for nitrogen and potassium. The demand of phosphorus is little, yet it could promote the vegetative growth, tuberization and starch accumulation.

马铃薯是喜钾作物，对氮、钾需求量较大，对磷需求量虽然较少，但磷可促进营养生长和块茎形成以及淀粉积累。

Generally, tall-stemed crops had deeper root system, but some short-statured crops, such as sugarbeet、peanut、wheat etc.

根系深浅与作物类型无关，不论各类、纤维类、豆类、甚至块根块茎类都有深浅之差。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。