The citrus trees are woody perennials, unlike annual crops. It has unique natural features, and its production changes as the tree get older.

Sand fixation effect of annual crops mixed with perennial ammodyte cross-line

一年生农作物与多年生沙生植物混播网格的固沙作用

Developing and rolling out new higher-yielding strains is much easier and quicker for annual crops like wheat than for perennials such as palm trees that take time to mature and will bear fruit for many years.

开发和种植新型高产品种对小麦这种一年生作物会有立竿见影的成效，而棕榈树这种多年生植物需要很长时间才能到达成熟期并且数年之内都可产出棕榈油。

Liming is a traditional and effective method to amend acid soil. Previous studies mostly focused on annual crops, but rarely on the perennial fruit trees.

施用石灰是一项传统而有效的酸性土壤改良措施，而以往的研究多集中在一年生作物上，对于多年生果树研究较少。

Effect and Mechanism of Corn ∥ Potato-Cotton/ Vegetable Cropping Pattern

玉米‖马铃薯-棉花/蔬菜种植模式的效益与机理

The research of agronomic measure for cropping pattern in wheat and maize

小麦和玉米（20+40）cm种植模式农艺措施的研究

Different cropping pattern influenced the yield of maize significantly.

不同种植模式对玉米的产量也有显著影响。

Studies on High Yield of Wheat/ Corn/ Corn Cropping Pattern

小麦/玉米/玉米种植模式的高产研究

A study on ecological and economic effects of zoning cropping pattern for tea

茶树宽窄行排列种植法的生态经济效应

Innovating cropping pattern, increasing the efficiency of resource utilization;

创新种植模式，提高资源利用效率；

Methane Emission From Single Cropping Rice Paddies Amended with Different Manures

不同施肥处理的一季稻田甲烷排放量研究

Problems of and Countermeasures to the Production of Single Cropping Rice in Ninghai, Zhejiang

宁海县单季稻生产中存在的问题及对策

Studies on reforms in cropping systems of single cropping rice in fujian's mountain regions

福建省山区单季稻田耕作制度改革的研究

The Phase ⅱ Target of the Chinese Single cropping Super Rice Realized One Year Ahead of Schedule

中国超级稻单季稻第2期目标提前一年实现

Potato Yields of Different Density Populations under Single Cropping Condition

净作条件下马铃薯不同密度群体产量初探

Moreover, the utilization ratios of climate resources, such as solar radiation, sunshine figure and so on, all lift over 71.6% compared with the single cropping of cotton.

且可利用日照时数、可利用太阳辐射量、可利用生理辐射量均比大田单作棉田提高71.6%以上；

The year-round light utilization ratio of the model attained 0.54%, which lifts 184.2% more than that of single cropping of cotton.

平均年光能利用率达0.54%，比大田单作棉花光能利用率提高了184.2%；

Characteristics of Weed Community of Mixed Cropping Annual Artificial Grassland

1年生人工混播草地杂草群落特性研究

Application of the biodiversity strategies in the control of rice blast by mixed cropping

水稻生物多样性混栽控制稻瘟病技术的应用

Effects of different nitrogen levels on iron nutrition and nitrogen fixation of peanut in maize-peanut mixed cropping system

玉米&花生混作体系中不同施氮水平对花生铁营养及固氮的影响

Effects of mixed cropping of maize and peanut on the N nutrition in cropping system

玉米-花生混作对系统内氮营养的影响研究