Download or read book F rmula para estimar la influencia de la humedad del suelo en la productividad de los cultivos written by Aldo Norero Sch. and published by . This book was released on 1974 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Moisture Regime Model Based on Climate Soil and Vegetation Factors for a Soil Catena Venezuelan Examples written by Pablo R. Marvez-Machado and published by . This book was released on 1982 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optimizacion de la Humedad Del Suelo Para la Produccion Vegetal written by Francis Shaxson and published by Food & Agriculture Org.. This book was released on 1995-07-30 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Esta publicacion analiza los procesos que ocurren sobre, dentro y debajo del suelo, y que permiten el movimiento del agua y el crecimiento de los cultivos. La publicacion esta dirigida a los usuarios de la tierra, y les proporcionara informacion para que hagan un mejor uso de los recursos basicos. Se espera contribuir con esta obra a fomentar el interes por utilizar mas racionalmente el agua de lluvia y poner en practica un manejo mas adecuado de los suelos. La publicacion podra ser util a todas aquellas personas que intervienen en el mantenimiento y aumento de la productividad, calidad y salud de la tierra -agricultores, personal tecnico, asesores, capacitadores, estudiantes y encargados de la toma de decisiones tecnicas- al favorecer los enfoques multidisciplinarios y el dialogo entre partes interesadas que disponen de conocimientos diferentes."
Download or read book Program of Regional Development written by Organization of American States. General Secretariat and published by . This book was released on 1977 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Respuesta en el rendimiento de los cultivos e diferentes niveles de humedad del suelo written by E. Palacios Valez and published by . This book was released on 1978 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: Las funciones de produccion. Los optimos economicos. El precio del agua. Un ejemplo ilustrativo. El uso de las funciones de produccion en la agricultura de temporal. Sobre la metodologia para obtener las funciones. Respuesta en el rendimiento de los cultivos a la tension de la humedad en el suelo en diferentes etapas de crecimiento. Los niveles de humedad del suelo en el analisis experimental. Los rangos de variacion de los niveles de humedad del suelo en el analisis experimental. Patrones de consumo de agua por las raices de las plantas y profundidad de control. Metodo para estimar el costo de oportunidad del agua en los distritos de riego. Tecnica de la experimentacion factorial. Disenos para estimar superficies de respusta. Analisis estadistico.
Download or read book Procedimiento para estimar la influencia de la napa fre tica en la productividad de los cultivos written by Aldo Norero and published by . This book was released on 1975* with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Efecto de la tension de la humedad del suelo en tres etapas fenologicas del cultivo del trigo durante el invierno de 1979 1980 written by A. Salinas Rodrigues and published by . This book was released on 1981 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: Con la finalidad de analizar el efecto de la humedad del suelo, para produccion de grano (Ton/ha), ademas de observar el efecto en cuanto a: Numero de hojas por tallo, altura de planta, numero de espigas por planta, tamano de espigas por planta, numero de amacolle por planta, numero de granos por planta y peso de grano de 10 plantas, analizando este efecto en las 3 etapas que fueram E (Embuche), A (Antesis) y M (Formacion de grano en estado maduro), incluyendo ademas en este trabajo la aplicacion de la formula para la estimacion de la evaporatranspiracion del trigo, la cual fue el metodo de Blaney-Criddle. Se realizo um experimento en terrenos pertenecientes a la Facultad de Agronomia de la U.A.N.L. en Marin, N.L. El suelo del area experimental es de textura arcillosa, sinproblemas de sales, pobre en materia organica con velocidad de infiltracion media. Se utilizo agua que segun un trabajo realizado por (Leal C.J. 1980), de la calidad de aguas en el campo agricola experimental de Marin, N.L. nos dice que el agua es de la clase C3, condicionada para ciertos cultivos. La variedad de semilla de trigo utilizada en el experimento fue la Anahuac-F-75, con una densidad de 150 kg/ha a la que se fertilizo con una dosis de 100-50-00, empleando como fuente para la aplicacion de nitrogeno Urea (46%N), y para la aplicacion del fosforo super fosfato de calcio triple (46% P2 O5). Para la aplicacion de los riegos se utilizaron sifones previamente calibrados. Para la medicion de la humedad aprovechable del suelo se uso el metodo de la resistencia electrica por medio de los blocks de yeso colocados en cada una de las parcelas experimentales. Se empleo el diseno experimental blocks al azar. El numero total de tratamientos fue de 9, siendo tres diferentes niveles de humedad del suelo en tres diferentes etapas de crescimento del trigo y el numero de repeticiones fue de 4 lo que dio como resultado tener 36 unidades experimetales. Al realizar loa analisis de varianza no se encontro significancia para ninguna de las variables analizadas con excepcion de la variable rendimiento de grano (Ton/Ha.). Los resultados indicaron que la etapa critica del cultivo de trigo es la compreendida entre la Antesis y formacion del grano en estado lechoso. En funcion de la produccion de grano y de los objetivos perseguidos por este trabajo se desprende que los niveles optimos de humedad aprovechable del suelo para obtener mayor rendimiento son (50-50-50), y ademas de obtener buenos rendimentos se economizara considerablemente agua. Se concluye que para que los datos obtenidos sean de verdadera utilidad es necessario la continuacion de estos trabajos. Al recomendar la realizacion de otro trabajo, se hace con el fin de que se controlen las fallas que se presentaron en este trabajo y que se amplien los rangos de humedad de cada uno de los tratamientos, ademas de esperar que las temperaturas sean mas favorables que ayudaran a obtener mayores rendimientos y de esta manera los resultados seran de mayor utilidad y mas confiables.
Download or read book Variaciones de la Humedad Del Suelo Durante El Ciclo Del Trigo Y Su Influencia en El Rendimiento Y Otras Caracteristicas Del Cultivo written by Roberto Nunez Escobar and published by . This book was released on 1958 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuevo metodo para medir la humedad del suelo written by H. J. Marelli and published by . This book was released on 1995 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Quality for Crop Production and Ecosystem Health written by E.G. Gregorich and published by Elsevier. This book was released on 1997-11-10 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil is a complex body that exists as many types, each with diverse properties that may vary widely across time and space as a function of many factors. This complexity makes the evaluation of soil quality much more challenging than that of water or air quality. Evaluation of soil quality now considers environmental implications as well as economic productivity, seeking to be more holistic in its approach.Thus, soil quality research draws from a wide range of disciplines, blending the approaches of biologists, physicists, chemists, ecologists, economists and agronomists, among others.This book presents a broad perspective of soil quality that includes these various perspectives and gives a strong theoretical basis for the assessment of soil quality.A short glossary provides definitions for terms used throughout the book.
Download or read book Source book of flavors written by Gary Reineccius and published by Springer Science & Business Media. This book was released on 2013-12-14 with total page 942 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flavor is unquestionably one of the most extremely secretive one-reluctant to dis close anything that might be of value to a important attributes of the food we eat. competitor. Thus, little information about Man does not eat simply to live but even the activities of the flavor industry itself is more so lives to eat. Take away the pleasure offood and life becomes relatively mundane. available to the public. There now is a substantial body of liter The goal of the original Source Book of ature dealing with food flavor. The "golden Flavors, written by Henry Heath, was to years" of flavor research in the United States bring together in one volume as much of the were the 1960s and 70s. Numerous academic worldwide data and facts and as many flavor and government institutions had strong related subjects (e. g. , food colors) as was flavor programs and money was readily possible. Henry Heath added a wealth of available for flavor research. In the 1980s personal information on how the industry and 90s, research funding has become diffi accomplishes its various activities, which cult to obtain, particularly in an esthetic had never been published in any other liter area such as food flavor. The number of ature. It has been the intent of this author to research groups focusing on food flavor has update and build upon the original work of declined in the United States. Fortunately, Henry Heath.
Download or read book Neglected Crops written by J. Esteban Hernández Bermejo and published by Food & Agriculture Org.. This book was released on 1994 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: About neglected crops of the American continent. Published in collaboration with the Botanical Garden of Cord�ba (Spain) as part of the Etnobot�nica92 Programme (Andalusia, 1992)
Download or read book HVAC Systems Duct Design written by Smacna and published by . This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A New roadmap for the Man and the Biosphere MAB Programme and its World Network of Biosphere Reserves written by UNESCO and published by UNESCO Publishing. This book was released on 2017-03-20 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Isotope Techniques in Hydrology written by International Atomic Energy Agency and published by . This book was released on 1968 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coccolithophores written by Hans R. Thierstein and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 567 pages. Available in PDF, EPUB and Kindle. Book excerpt: This introduction to one of the most common phytoplankton types provides broad coverage from molecular and cellular biology all the way to its impact on the global carbon cycle and climate. Individual chapters focus on coccolithophore biology, ecology, evolutionary phylogeny and impact on current and past global changes. The book addresses fundamental questions about the interaction between the biota and the environment at various temporal and spatial scales.
Download or read book Diseases of Sugarcane written by C. Ricaud and published by Elsevier. This book was released on 2012-12-02 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: An extensive volume of Sugarcane Diseases and their World Distribution (Vol. I) was published by Elsevier under the auspices of the International Society of Sugar Cane Technologists in 1961. The present volume was intended to be a new edition of the book, but so many changes were required that a new book was needed. Only three chapters have been kept with slight amendments. The other chapters have been completely re-written. In fact with changes in importance of major diseases, four diseases previously treated have been left out; on the other hand, three new topics have been included in the new book, two new diseases and a chapter on sugarcane quarantine.The first chapter gives a brief account of the anatomy, morphology and physiology of the sugarcane plant to facilitate terminology and especially for a better appreciation of the effect of disease on the growth of the crop. Diseases are extensively treated as in Volume I, with a very good description of their symptoms and variation under different conditions and severity, all well illustrated by black and white figures and in a set of colour plates at the end of the book which will prove of valuable help for identification. The causal agents of the diseases are described giving synonyms, cultural characteristics, isolation methods and present knowledge on race variation, an aspect on which there has been quite an advance in knowledge since Volume I was published. New techniques of diagnosis are also given. Advances in research on the diseases over the last 25 years are well covered and supported by an extensive bibliography at the end of each chapter.The book has been edited by people having first hand experience in the field and in research on these diseases. Authors have been selected from among the most knowledgeable all over the sugar cane world, especially with due regard to the importance of the different diseases in their countries.The book should prove of immense value to those concerned with practical aspects of plant disease control in the field: pathologists, agronomists and crop specialists, including consultants, to those concerned with quarantine of the crop, for university lectures and students, and research scientists.In a pre-publication review D.J. Heinz and S.A. Ferreira of the Hawaiian Sugar Planters' Association stated: ``Much has changed and new information generated since the original version of this book was published in 1961. This new edition incorporates most of it, providing both the laboratory and field sugarcane pathologist a complete and authoritative guide to the major sugarcane diseases of the world. It is the best single book available on sugarcane diseases.''
