Results indicate that:(1) by using HANTS, the researchers could get the EVI/NDVI harmonic curves, the mean VIs and the amplitude of the harmonics which then were utilized in the identification of the cultivated land, and EVI appeared to be more precise, with the overall accuracies of 97.17% and 95.99% and Kappa coefficients of 0.7938 and 0.6518, respectively.(2) Multiple cropping index was extracted by counting the number of the curve's peak; and when the threshold of the peak value of the NDVI and EVI curves were set as 0.25 and 0.20, respectively, the fallow land could be well figured out.(3) From harmonic curves, some eigenvalues, such as time of the maximum growth rate, time of peak and the value of peak can be extracted, based on which the crop types can be primarily distinguished. And EVI still performed better than NDVI in this section.

結(jié)果顯示：（1）利用傅立葉諧波變換得到的EVI和NDVI時(shí)間譜曲線的諧波余項(xiàng)及諧波振幅對(duì)耕地進(jìn)行識(shí)別亚洲国产欧洲日本综合，從識(shí)別精度來看无码18，EVI要優(yōu)于NDVI，識(shí)別精度分別為97.17%和 95.99%插的太舒服在线视频，Kappa系數(shù)分別達(dá)到0.7938和0.6518视频色色；（2）通過計(jì)算時(shí)間序列曲線的波峰數(shù)能夠提取耕地的復(fù)種指數(shù)，并且在EVI和NDVI曲線波峰閾值分別設(shè)為0.20和0.25時(shí)国产在线小视频欧美看大片，休耕地能較為準(zhǔn)確地被識(shí)別出來欧洲一级黄色视频；（3）通過提取作物生長期內(nèi)曲線的VI最大增長速率時(shí)間點(diǎn)以及峰值時(shí)間點(diǎn)等信息91性色在线观看www免费，作物種類能被初步識(shí)別，并且EVI較NDVI具有更強(qiáng)的識(shí)別能力国产精品一本二本在线。

That close-shaven turf, those pebbly paths, that chalk, those pools, those harsh monotonies of waste and fallow lands, the plants of early market-garden suddenly springing into sight in a bottom, that mixture of the savage and the citizen, those vast desert nooks where the garrison drums practise noisily, and produce a sort of lisping of battle, those hermits by day and cut-throats by night, that clumsy mill which turns in the wind, the hoisting-wheels of the quarries, the tea-gardens at the corners of the cemeteries; the mysterious charm of great, sombre walls squarely intersecting immense, vague stretches of land inundated with sunshine and full of butterflies,--all this attracted him.

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This forced many farmers, already saddled with debt, to leave their ponds fallow.

這強(qiáng)迫了許多農(nóng)民黄色三级片免费看视频，已經(jīng)負(fù)擔(dān)債務(wù)，留下他們的池塘休耕地涩涩网站视频。

But this year about 90 million acres of corn will be grown in the US, which is enough to meet current needs, and in the future there are substantial amounts of set-aside land that could take switchgrass and other crops.

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N2O flux was higher in soil containing wheat plants compared to unplanted treatments during the entire growth period. Maximum N2O flux occurred at the booting stage, and then decreased as root activity decreased in later growth stages. N2O emission in the main root-zone and the inter-mw was different.

結(jié)果表明，在實(shí)驗(yàn)的各個(gè)時(shí)期土壤N2O平均排放通量麥田均高于休耕地农村熟女乱子a，在孕穗期麥田N2O排放通量出現(xiàn)最大值久久青草国产免费频观日本；而隨根系質(zhì)量和活性下降，生殖后期N2O排放量減少亚洲人人看。

Open unseeded fallows, rich fields of clover and timothy

空曠的沒有下種的休耕地视频黄片在线，豐盛的三葉草和梯牧草田野

And forthwith their shrill little voices uprose on the air, singing one of the old-time carols that their forefathers composed in fields that were fallow and held by frost, or when snow-bound in chimney corners, and handed down to be sung in the miry street to lamp-lit windows at Yule-time.

跟著尖細(xì)的小嗓就一齊唱了起來，唱的是一首古老的圣誕歌欧美一级a爱片在线播放。這首歌成人av小姐网站图片大全，是他們的祖輩們在冰霜覆蓋的休耕地里，或者在大雪封門的爐邊創(chuàng)作的又又硬又粗又爽又黄又大的免费视频，一代又一代傳了下來亚洲免费视频一区二区。每逢圣誕節(jié)，田鼠們就站在泥濘的街道上国产人人综合，對(duì)著燈光明亮的窗子国产三级电影视频，唱這些圣詩。

The Black Death raised the price of labour and boosted trade, for English sheep grew longer fleeces as they grazed fields newly left fallow, and local cloth improved.

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A bare fallow can be used with a herbicide such as glyphosate or amitrole.

對(duì)荒禿的休耕地可以使用象鎮(zhèn)草寧或殺草強(qiáng)一類的混合除草劑看免费刺激欧美作爱大片。