Determination of suitable irrigation lengths and intervals using capacitance humidity sensors for a sandy soil

production, during the summer of 2010. This farm is integrated at the Spanish research network for the sugar beet development (AIMCRA) which regarding irrigation, focuses on maximizing water saving and cost reduction. According to AIMCRA 0 s perspective for promoting irrigation best practices, it is essential to understand soil response to irrigation i.e. maximum irrigation length for each soil infiltration capacity. The Use of Humidity Sensors provides foundations to address soil 0 s behavior at the irrigation events and, therefore, to establish the boundaries regarding irrigation length and irrigation interval. In order to understand to what extent farmer 0 s performance at Tordesillas farm could have been potentially improved, this study aims to address suitable irrigation length and intervals for the given soil properties and evapotranspiration rates. In this sense, several humidity sensors were installed: (1) A Frequency Domain Reflectometry (FDR) EnviroScan Probe taking readings at 10, 20, 40 and 60cm depth and (2) different Time Domain Reflectometry (TDR) Echo 2 and Cr200 probes buried in a 50cm x 30cm x 50cm pit and placed along the walls at 10, 20, 30 and 40 cm depth. Moreover, in order to define soil properties, a textural analysis at the Tordesillas Farm was conducted. Also, data from the Tordesillas meteorological station was utilized.

Psychrometric tables for obtaining the vapor pressure, relative humidity, and temperature of the dew-point : from readings of the wet and dry bulb thermometers /

At head of title: U.S. Dept. of Agriculture, Weather Bureau.

Niagara controlled humidity method of air conditioning using hygrol, hygienic liquid absorbent. Engineering data presenting a new, simplified method of calculating both the load conditions and the selection of equipment.

Mode of access: Internet.

The climate of Great Britain; or, Remarks on the change it has undergone, particularly within the last fifty years, accounting for the increasing humidity and consequent cloudiness and coldness of our springs and summers, with the effects such ungenial seasons have produced upon the vegetable and animal economy, including various experiments to ascertain the causes of such change ...

Mode of access: Internet.

Effect of temperature and humidity on development and potential distribution of the Mexican fruit fly in the United States /

Caption title.

Fundamental laws of humidity with charts and tables /

Mode of access: Internet.