| 1. | Determination of lime requirement in forest soil
森林土壤石灰施用量的测定 |
| 2. | Effects of potassium on yield of cotton gossypium hirsutum l . and optimal quantity of potassium in huanghuaihai plain , china
钾肥对棉花产量的影响及最佳施用量研究 |
| 3. | 05 % in paddy field on desalting muddy polder , respectively ; 7 . 35 % , 6 . 01 % and 10
但是，随施用量的增加， ‘微生物生物量的增减趋势不一，并且不同施用量之间差异不显著。 |
| 4. | Despite the reduced oil content with increasing nitrogen rates , the highest oil production per hectare came from the highest nitrogen treatment
尽管随着氮肥施用量的增加含油率下降，但每公顷最高油产量仍得自于最高的施氮肥处理。 |
| 5. | One of the most important features of the data in table 1 and figure 1 is that rice yields become less responsive to the addition of fertilizer as fertilizer use increases
表1和图1中的数据所表现的一个重要特性是：随着肥料施用量的增加，追加的肥料所带来的水稻产量的增加量逐渐减小。 |
| 6. | In order to find out the variations of soil nutrient content in farmlands of guizhou , a survey of soil and fertilizer was conducted again in 1998 , based on the survey results of 1985
摘要为?解近年来化肥施用量倍增后，贵州农田土壤养分含量的变化，在1985年土壤调查的基础上， 1998年再次进行了土壤和肥料调查。 |
| 7. | Abstract : in order to find out the variations of soil nutrient content infarmlan ds of guizhou , a survey of soil and fertilizer was conducted again in 1998 , base d on the survey results of 1985
文摘:为了解近年来化肥施用量倍增后，贵州农田土壤养分含量的变化，在1985年土壤调查的基础上， 1998年再次进行了土壤和肥料调查。 |
| 8. | The ability to reduce application rates through use of crn enables producers to avoid the uneconomical practice of applying fertilizer in excess of soil and crop requirements as insurance against potentially large n losses
通过用控释氮肥可以减少施用量，使生产者避免使用超过土壤和作物需要过多的不经济施肥，避免氮素大量损失。 |
| 9. | Some results are as follows : the highest concentration of nh 4 + - n in leachate is closely related with urea quantity applied at 20cm depth , but not different significantly related at 60cm and 120cm depth
其试验结果如下：在不同尿素施用量情况下，各处理中20cm处渗漏液中nh _ 4 ~ + - n最高浓度值与施肥量密切相关，但60cm和120cm处渗漏液中nh _ 4 ~ + - n浓度与施肥量关系不大。 |
| 10. | The most important factors affected crop yield and economics in these experiments were : rape : population density ; early rice : interaction of p k ; late rice : rate of nitrogen application ; wheat : variety ; midrice . interaction of n k
这些试验中影响作物产量最重要的因素是：油菜：种植密度；早稻：磷钾交互作用；晚稻：氮肥施用量；小麦：品种；中稻：氮钾交互作用。 |
