hm2

Ai / hm2 and the suitable method is by spray .

ai/hm2，适宜的施药方法为喷雾法。

With nitrogen application amount between 75150 kg / hm2 ; grain had better milling quality ;

施氮量在75150kg/hm2范围内，稻谷具有较好的加工品质；

When applying pure nitrogen over 375 kg / hm2 , economic efficiency will drop .

施氮量超过450kg/hm2时，经济效益下降；

Theoretical sink capacity is 12821.7 kg / hm2 in average , similar to the control .

理论库容平均为12821.7kg／hm~2，与比对照平均12902.9kg／hm~2相近；

Above the nutrition control could get more than 16000 kg / hm2 with super-high yield .

上述养分调控技术可获得15000kg/hm2以上的超高产水平。

Forecasted per capita cultivated land will be 0.78 hm2 by 2030 ;

预计到2030年河北省的人均耕地将在0.78hm2左右；

Water use efficiency under the 9000 kg / hm2 straw mulching treatment was increased by 5.7 % .

作物水分利用效率秸秆9000kg/hm2覆盖较无覆盖处理的增加幅度为5.7%。

The stocked land 914.3 hm2 , account for 3.31 % ;

疏林地914.3hm2，占3.31%；

The optimum storage norm was 900 m3 / hm2 .

适宜的储水定额是900m3/hm2。

Wheat cultural techniques of 6000kg / hm2 in north Hubei highland

鄂北岗地小麦公顷产量6000kg栽培技术研究与应用

The variety has been extended for 427 000 hm2 , and a huge social economic effect has been achieved .

目前已累计推广42.7万hm~2，创造了巨大经济效益和社会效益。

25 October density of 120 million / hm2 was the lowest number of secondary roots .

晚播期10月25日密度为120万/hm2次生根数目为最低。

The result showed annual average soil erosion amount was 982.5 t / hm2 and it was light degree erosion .

结果表明，龙口市年均侵蚀模数为982.5t/（hm2.a），侵蚀强度属轻度；

The stands with high density ( 1650 strain / hm2 ) is favorable to papermaking .

高密度林分（1650株／hm2）中白桦木材材性最有利于造纸。

/ hm2 mixing with fomesafen can inhibit soybean growth .

／hm~2时与氟磺胺草醚混用对大豆生长有抑制作用。

This actually became the groundwork for HM2 indirectly .

这实际上成了万hm2间接基础。

Lower density ( less than 1,500 plants / hm2 ) is conducive to DBH growth . 4 .

较小密度（小于1500株/hm2）有利于胸径生长。

Under the experimental condition , the optimum rate of potassium sulphate was 100kg / hm2 .

试验条件下硫酸钾施用量以100kg/hm2为宜。

Normally , the dry mass yields for grazing is 2 - 5 t / hm2 ;

用作放牧人工草地年干物质产量一般为2～5t/hm2；

In this experiment , the best combination is 270 kg / hm2 in K application rate and 3:7 in BS ratio .

本试验以施K量270kg／hm2，基追肥比例3：7为最优组合。

The rice seed yield can be 6690 kg / hm2 , increased by 40 % over the regular breeding .

制种产量可达6690kg/hm2，比常规制种产量提高40%左右；

The main factors that influenced the stand species diversity were the basal area / hm2 and the density / hm2 .

林分物种多样性主要受到了公顷断面积和公顷株数的影响。

Therefore , in the experiment , the suitable dosage of K application in mulberry garden was 148.5 kg / hm2 .

本试验条件下，桑园钾肥适宜用量为148.5kg/hm2。

Agronomic character , economic character and quality character were considered comprehensively that the 270kg / hm2 nitrogen application was better .

农艺性状、经济性状、品质性状综合比较，在云南宾川白肋烟产区以施氮270kg/hm2为宜。

The lawn herds take the center herds the intensity ( 6 / hm2 ) as best .

草地放牧以中放牧强度（6只/hm2）为最佳。

The supplying amount of P and K in CK were 55.4 and 139.2 kg / hm2 , respectively .

不施肥处理的土壤供P、K量分别为55.4和139.2kg/hm2，NP配施土壤供K量比对照提高15.7%；

There are large areas and many kinds of acid soil in our country . The total areas amount to more than two hundred million hm2 .

我国土壤中酸性土面积大而种类多，酸性土总面积在2亿hm~2以上。

The reasonable sulfur dosage should be 31.5 ~ 60.0 kg / hm2 for most crops in Guizhou province .

贵州省主要农作物经济合理的施硫量为31.5～60.0kgS/hm~2。

The benefits of ecology , society , economy are remarkable , its economic value converts into 3.82 thousand Yuan / hm2 .

治理后的社会、生态、经济效益明显，综合经济价值可达3.82万元／hm2。

In this paper . based on the analysis of current exploitation patterns of 100 hm2 mound land in Ersheng Town .

在分析该市二圣乡100hm2岗坡地经营利用现状的基础上。