However , the main constraint to this technology at present is the availability of a suitable drill for the farmer 然而，目前这种技术的主要限制是农民没有可用的条播机。
The latter can be overcome by either designing a zero - till seed drill that places fertilizer in the soil at planting time 后一个问题也可由设计新的免耕条播机、播种同时施肥来克服。
4 . the improved pixel lateral histogram algorithm was used to extract the centre of crop row . the infield adaptability of the pixel lateral histogram algorithm was enhanced by subsection computation of pixel lateral histogram 根据条播作物行距基本恒定、作物成行排列的位置特征，利用改进的象素位置直方图法识别作物中心行，通过分段统计象素位置直方图，有效地提高了算法的田间适应度。
Those served by the fibre - optic network get all 36 channels . the basic service includes several locally - produced channels , notably a 24 - hour cantonese news service , and channels devoted to sports , movies , music , children s programmes , finance and horse racing 基本服务包括数条播放本地制作节目的频道，例如全日24小时播放粤语新闻，以及报道财经、体育、赛马消息、播放电影、音乐、儿童节目等频道。
Precision seeder , grain drill seeder , hill - drop planter , seeding monomer , and seed sowing device for the first time are realize to be tested on one comprehensive test - bed , and at the same time , hard problem of evaluating seeding accuracy from seed kernel space interval is solved 该系统首次实现了对精密播种机、谷物条播机、穴播机，及排种器等多类型播种机具播种精度的检测，解决了通过直接获得种子粒间距而检测播种精度这一难点问题。
The comprehensive seeding accuracy testing method proposed in this dissertation to test performance of precision seeder , grain drill seeder , hill - drop planter , seeding monomer , and seed sowing device is an integrative one with technology of computer vision , patter recognition , and automatic control 本文提出的适用于精密播种机、谷物条播机、穴播机，及排种器等多类型播种机具的播种精度检测方法，是集计算机视觉、模式识别、自动控制为一体的综合技术。
3 . because of the severe occluding of drilling crop leaves , it was difficult to extract shape and texture feature , so a new approach to detect the between - rows weed was discussed on the basis of the position feature , where crop was regularly sown as a constant row space and most weed were distributed on the bare - soil between crop rows during 3 leaves to 5 leaves seedling stage 针对小麦等条播作物田间场景中叶片严重交叠致使形状和纹理特征提取困难的问题，利用条播作物3 5叶苗期田间场景中作物成行排列、杂草多数分布于作物行之间的裸土区的特点，研究了位置特征识别行间杂草的方法。
This series of seeders are hydraulic suspended type multi - functional machine integrating fertil - izing and intertillage management , working for deep side fertilizing and sowing in drill for the crops or wheat , cole , etc . , and deep side fertilizing , precision drilling , parallel sowing , ridge tillage , and intertillage management , etc . , for soybean , corn , beet , etc 该系列播种机为液压悬挂式，多功能播种机，施肥、中耕管理于一机，可以进行小麦、油菜等作物的侧深施肥条播作业；大豆、玉米、甜菜等作物侧深施肥、精量点播、平播、垄作、中耕管理等项工作。
Referring to the achievements of conservation tillage on dry land farming , there is a series of work to be done to develop new tillage techniques to adapt to double cropping system of wheat and maize in shandong province . such work includes controlling the combine traveling along the line , return the stalk to the field after chopped , subsoiling being done in maize ' s growing stage . the advantage of subsoiling is to make the soil inter placed with soft and hard strips , which is good for decreasing runoff and vaporizing , and retaining rain 1 、保护性耕作条件下，普通小麦条播机的播种质量较差，小麦的田间出苗率比传统耕作低9 . 3 ；保护性耕作小麦冬前地上部分的生长状况也较传统耕作小麦差；由于根系的生长条件较为优越，保护性耕作的小麦的根系生长旺盛、分布广，越冬后有利于小麦的地上部分生长，大量发生春季分蘖和次生根，幼穗强烈分化，表现出较传统耕作小麦强的生长优势，产量提高6左右。
Abstract : the climatic factors in different growth stages of late - seeded and filmed winter wheat were discussed with the application of the field test data . the agricultural climate cause of late - seeded and filmed winter wheat with high yield and water - saving was analysed . the species of late - seeded and filmed winter wheat corresponding to multi - cropping cotton was selected 文摘:根据田间试验资料，讨论了晚播膜下条播冬麦各生长发育时段气候条件的适宜程度，并分析了晚播地膜冬麦高产节水的农业气候原因，在此基础上确定了与复播棉花相配套的晚播地膜冬麦的品种选择。
