In 1923 a 20-year experiment was begun in an effort to gain information on the following points: (1) The factors that influence the longevity of Azotobacter when introduced into a soil from which it is normally absent; (2) the effect of introducing and maintaining an Azotobacter flora in such a soil upon the crop-producing abihty and the nitrogen balance of the soil. The recent comprehensive su...

-This paper describes preferences for attributes of ideal soil substitutes reported by industry demand segments, and relates those attributes to willingness to pay for soil substitutes. Regression results on principal components indicate that concern over product stability, safety and environmental protection induce higher willingness to pay for ideal soil products. -----KEY WORDS----compost, m...

Vegetative buffers may function better for filtering agricultural runoff in some locations than in others because of intrinsic characteristics of the land on which they are placed. The objective of this study was to develop a method based on soil survey attributes that can be used to compare soil map units for how effectively a buffer installed in them could remove pollutants from crop field ru...

The multilingual soil profile database (named SDBm Plus) is user-friendly software designed to store and retrieve in an efficient and systematic way the large amounts of geo-referenced soil attribute data collected in soil surveys and laboratories. The database has the following main characteristics: (i) running on Windows platforms; (ii) ‘assist menus’ facilitating data entry; (iii) automatic ...

Background. Soil-transmitted helminthic infection is a common public health challenge of primary school children in resource challenged and developing countries. Our aim was to determine the prevalence and pattern of soil-transmitted helminthic infection among primary school children in a rural community in Imo State, Nigeria. Method. The study involved a cross-sectional survey of 284 primary s...

River and the middle reaches of the Yellow River Z.C. Zhou*, Z.T. Gan, Z.P. Shangguan and Z.B Dong Department of Tourism and Environmental Sciences, Shaanxi Normal University, Xi’an, China; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling, China; Key Laboratory of Disaster Survey and Me...

struments have received the most attention for fieldscale agricultural applications, particularly the EM-38. Electromagnetic induction surveys are often used in practice to In 1992, Dı́az and Herrero discussed the monitoring estimate field-scale soil salinity patterns, and to infer changing salinity of soil salinity conditions with time in two fields using conditions with time. We developed a st...

Agricultural producers require knowledge of soil water at plant rooting depths,while many remote sensing studies have focused on surface soil water or mechanisticmodels that are not easily parameterized. We developed site-specific empirical models topredict spring soil water content for two Montana ranches. Calibration data sample sizeswere based on the estimated variability of soil water and t...