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By Donald L. Sparks

Quantity fifty nine includes seven reports overlaying key modern themes on crop and soil sciences. As regularly, the subjects are various and exemplary of the array of subject material lined by way of this long-running serial. Crop technology is represented by way of chapters on quantitative genetics and plant breeding, wheat, perennial forages, and cotton. those chapters are balanced through man made stories of organoclays in pollutants abatement, the purposes of micromorphology, and the significance of long term box examine. With this newest quantity, Advances in Agronomy is still famous as a number one reference and as a chief resource of the newest examine in agronomy, crop technology, and soil technological know-how. Key good points* Quantitative genetics* Organoclays and pollutants* Phenology, improvement, and development* Micromorphology and agronomy* Physiological and morphological responses to emphasize* Crop modeling* the worth of long term experiments

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Regardless of clay type, the extent of desorption of HDTMA will be highest in pure water and will decrease with increasing ionic strength (Xu and Boyd, 1995a). C. ABIOTIC DECOMPOSITION OF THEADSORBED ORGANIC MODIFIERS Clay minerals are heterogeneous catalysts for many degradation reactions involving organic compounds (Mortland, 1970). Under certain conditions, organic modifiers, such as QACs in montmorillonite and vermiculite interlayers, can un- 36 S. XU ET AL. , 1972; Chou and McAtee, 1969). , alcohols).

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