To harvest a grain crop using a cutting, threshing, and cleaning machine

用聯(lián)合收割機(jī)收割：用切割wwwA片网站国产、脫粒网络视频偷拍网、打場機(jī)收割莊稼

"There are two types of oyster farming: suspension culture, in which oysters are grown off bottom, in floating trays, is a labor-intensive form of cultivation that requires continuous tending and cleaning of both gear and shellfish, and bottom culture, which is similar to conventional crop farming on land; it involves selecting areas of the sea floor that provide a natural food supply, necessary currents, minimum exposure to predators, and proper temperature and then ""seeding" the bottom with shellfish stock that are left to grow to market size.

中文解釋=有兩種典型的牡蠣養(yǎng)殖場︰懸浮養(yǎng)殖，牡蠣不接觸海水底部而在懸浮的箱架中生長2012在线中文字幕，屬於勞動(dòng)力密集型式的養(yǎng)殖方式你懂的网页，工具和貝都需要經(jīng)常照顧和清洗。底部養(yǎng)殖18禁又污又黄又爽的网站，類似於傳統(tǒng)的在土地上種植農(nóng)作物最新超碰在线免费观看，需要選擇能提供營養(yǎng)物、必須的水流、被捕食者接觸的機(jī)會(huì)最小90后久久综合九色综合、和適宜的溫度的海底地午夜黄色网a，然后將貝類&種植&在海底国产黄页在线观看黄A∨，讓它生長到市場所需的大小免费裸体黄网站在线观看。

cleaning crop：抑草作物

除此之外,蕪菁和三葉草還直接地作用于土壤,蕪菁和中耕結(jié)合在一起可以取得抑草作物(cleaning crop)的作用,三葉草做為一種固氮的豆科作物,增加了糧食作物所必需的營養(yǎng)供應(yīng),對(duì)于提高谷物的產(chǎn)量取到重要的作用.