Results 11 to 20 of about 117,131 (254)

A química orgânica na consolidação dos conceitos de átomo e molécula Organic chemistry in the consolidation of the concepts of atom and molecule

open access: yesQuímica Nova, 2009
The present work discusses the appearance of the concepts of valence and molecular structure, and describes the appropriation and evolution of the concept of molecule in the period following the publication of Avogadro's Hypothesis.
Tânia de Oliveira Camel   +2 more
doaj   +1 more source

Identifying major factors controlling groundwater chemistry in predominantly agricultural area of Kattumannarkoil taluk, India, using the hydrochemical processes and GIS

open access: yesGeology, Ecology, and Landscapes, 2021
Hydrochemical investigation was carried out in predominantly agricultural area of Cuddalore district, South East India. The objective was to determine the potential factors controlling groundwater chemistry and their seasonal variation.
Remy Rumuri, Manivannan R.
doaj   +1 more source

MANUAL OF AGRICULTURAL CHEMISTRY. [PDF]

open access: yesJournal of the American Chemical Society, 1904
n ...
openaire   +1 more source

Effects of a chain of reservoirs on temporal and spatial variation in water chemistry within an endorheic basin

open access: yesEcological Indicators, 2021
Reservoirs provide more than 90% of water for agricultural, municipal, and environmental flows in arid regions. Yet, these resources may be compromised if the effects of reservoirs on water chemistry are not considered.
Guofeng Zhu   +7 more
doaj   +1 more source

Chemistry and soil resource protection in the training of Media Technicians in Agronomy

open access: yesRevista MENDIVE, 2022
In the training of middle technicians in Agronomy, chemistry plays a decisive role, since for agricultural production much use is made of chemicals that are used as fertilizers and pesticides, and to regulate plant growth, in search of high agricultural ...
Nelson Núñez Coba   +1 more
doaj  

Biochars Derived from Gasified Feedstocks Increase the Growth and Improve Nutrient Acquisition of Triticum aestivum (L.) Grown in Agricultural Alfisols

open access: yesAgriculture, 2015
Biochars are produced by low-oxygen gasification or pyrolysis of organic waste products, and can be co-produced with energy, achieving waste diversion and delivering a soil amendment that can improve agricultural yields.
Kristin M. Trippe   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy