农业土壤的

The objectives of this study were to develop a wireless sensor network technologies for agrometeorological disaster early alarm system and processing system. In this study, the foehn with a high temperature and low humidity has been monitored. The wireless sensor acquisition module ZigBee has been used to monitor the climate conditions combined with a GPRS wireless transmission module to construct wireless disaster alarm sytem. Graphical programming computer software package LabVIEW 8.2 was used to develop the control and monitoring systems.

本论文研究目的旨在发展气象灾害预警及处理系统，以焚风灾害为研究对象，焚风为台湾农业气象灾害之ㄧ，每年发生次数频繁且不可预测，当焚风发生时，监控焚风产生的高温和低湿变化，透过ZigBee无线传输技术，可连结温湿度、光度及土壤含水率等感测器，并与GPRS模组结合，将资料即时传送至伺服平台，藉由LabVIEW程式监控环境变化，达到气象环境即时监测之目的。

GASKIN G J%MILLER J D Measurement of soil water content using a simplified impedance measuring technique 10.1006/jaer.1996.0017 Irriagric Engng Res , 1996,3

王一鸣%赵燕东基于驻波率原理的土壤水分测量方法研究北京：中国农业大学出版社， 1999，null

It is rich in humus and slightly acid, due to leaching of lime.

富含腐殖质，微酸性，是比较好的农业用土壤。

To inoculate beneficial microorganisms has been the topic of scientist to cope with it.

在生态农业中，通过向土壤中接种有益微生物部分替代化肥已是科学家研究的热点。

Nitrogen is often considered to be one of the most important limiting factors for plants.

土壤氮素在农业生产中占有重要地位，是植物生长所必需的营养元素之一。

The soil salinity is an important problem to agriculture production and ecological environment.

土壤盐渍化是影响农业生产与生态环境的一个重要因素。

Of planting a narrow slit trench without ploughing the soil. These systems.

免耕农业只需要挖一些窄的裂沟，而不需要对土壤进行耕作。

The best application method is that 60% of silicon is used as based fertilizers, 40% of silicon as topdressing used in the eighth leaf.

现在硅肥已被国际土壤界列为继氮、磷、钾之后的第四大元素肥料，为全球农业及化肥业所重视[2]。

Sunlight,air,water and soil are the main factors of agro-ecological environment.

阳光、大气、水、土壤是构成农业生态环境的主要因素。

In this paper some main geological hazerds in SanJiang plain region in the process of agri-caltrual development, such as soil erosion, seline-alkaline soil, flood and waterlog hazard, en- vironmental pollution, wind erosion to soil are discussed.

本文着重阐述了我国三江平原地区在农业开发过程中出现的水土流失、土壤风蚀砂化、盐碱土，洪涝灾害、环境污染等主要环境地质问题，并以实例说明了其危害

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。