Soils and General Agronomy

Sorption, degradation and leaching of pesticides in soils amended with organic matter: A review

The use of pesticides in modern agriculture is unavoidable because they are required to control weeds. Pesticides are poisonous; hence, they are dangerous if misused. Understanding the fate of pesticides will be useful to use them safely. Therefore, contaminations of water and soil resources could be avoided. The fates of pesticides in soils are influenced by their sorption, decomposition and m...

University of Puerto Rico – Mayagüez Campus College of Agricultural Sciences Department of Agronomy and Soils Department of Agricultural and Biosystems Engineering Nutrient Discharges from Mayagüez Bay Watershed FINAL PROGRESS REPORT

The Role of Silicon in Suppressing Rice Diseases

Some of these soil orders such as Ultisols and Oxisol account for 34% of the area of major soil orders in the tropics. These orders occupy great amounts of land (approximately 1,666 million hectares) in Africa and South and Central America (Fig. 2). Histosols and sandy Entisols also contain low levels of Si (57). As a result of Si leaching, the soluble Si content of tropical soils, such as Ulti...

DIVISION S -3—SOIL MICROBIOLOGY AND BIOCHEMISTRY The Role of Nitrate Diffusion in Determining the Order and Rate of Denitrification in Flooded Soil: I. Experimental Results

presence and activity of denitrifiers. These factors have The effect of NO3--N diffusion on the order and rate of debeen studied bv several workers, for example, Bremner and nitrification reaction was studied in IS soils from various locations in Shaw (1958a, 1958b), Nommik (1956), Patrick (1960), the U.S. The soils were amended with 0.5% rice straw and incubated Broadbent and Clark (1965), and...

Dr Stephen Baker, Head of Soils and Sports Surface Science at the STRI , looks at the current and future research on golf course agronomy wi th part icular emphasis on the problem of winter wear

The parties are over, the hangovers have receded and, yes, we are into the year 2000. In the December 1999 issue of Greenkeeper International, I considered aspects of research on golf course agronomy through the last century. As we move into the new millennium it is appropriate to review the implications of current research projects and to identify some of the many areas where future work is ne...