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Planters
Sowing crops on a farm would be backbreaking working without the machines called planters. These tractor-pulled tools can look quite different. Some are small, sowing just one row, and some can plant as many as 48 rows at a time. Readers will find out how these machines work and see their parts in motion in labeled photographs. Theyll also discover how technology is changing this farm machine as well as some other seeding devices.
Book
Crop pests and predators exhibit inconsistent responses to surrounding landscape composition
The idea that noncrop habitat enhances pest control and represents a win–win opportunity to conserve biodiversity and bolster yields has emerged as an agroecological paradigm. However, while noncrop habitat in landscapes surrounding farms sometimes benefits pest predators, natural enemy responses remain heterogeneous across studies and effects on pests are inconclusive. The observed heterogeneity in species responses to noncrop habitat may be biological in origin or could result from variation in how habitat and biocontrol are measured. Here, we use a pest-control database encompassing 132 studies and 6,759 sites worldwide to model natural enemy and pest abundances, predation rates, and crop damage as a function of landscape composition. Our results showed that although landscape composition explained significant variation within studies, pest and enemy abundances, predation rates, crop damage, and yields each exhibited different responses across studies, sometimes increasing and sometimes decreasing in landscapes with more noncrop habitat but overall showing no consistent trend. Thus, models that used landscape-composition variables to predict pest-control dynamics demonstrated little potential to explain variation across studies, though prediction did improve when comparing studies with similar crop and landscape features. Overall, our work shows that surrounding noncrop habitat does not consistently improve pest management, meaning habitat conservation may bolster production in some systems and depress yields in others. Future efforts to develop tools that inform farmers when habitat conservation truly represents a win–win would benefit from increased understanding of how landscape effects are modulated by local farm management and the biology of pests and their enemies.
Journal Article
Green Revolution research saved an estimated 18 to 27 million hectares from being brought into agricultural production
New estimates of the impacts of germplasm improvement in the major staple crops between 1965 and 2004 on global land-cover change are presented, based on simulations carried out using a global economic model (Global Trade Analysis Project Agro-Ecological Zone), a multicommodity, multiregional computable general equilibrium model linked to a global spatially explicit database on land use. We estimate the impact of removing the gains in cereal productivity attributed to the widespread adoption of improved varieties in developing countries. Here, several different effects—higher yields, lower prices, higher land rents, and trade effects—have been incorporated in a single model of the impact of Green Revolution research (and subsequent advances in yields from crop germplasm improvement) on land-cover change. Our results generally support the Borlaug hypothesis that increases in cereal yields as a result of widespread adoption of improved crop germplasm have saved natural ecosystems from being converted to agriculture. However, this relationship is complex, and the net effect is of a much smaller magnitude than Borlaug proposed. We estimate that the total crop area in 2004 would have been between 17.9 and 26.7 million hectares larger in a world that had not benefited from crop germplasm improvement since 1965. Of these hectares, 12.0-17.7 million would have been in developing countries, displacing pastures and resulting in an estimated 2 million hectares of additional deforestation. However, the negative impacts of higher food prices on poverty and hunger under this scenario would likely have dwarfed the welfare effects of agricultural expansion.
Journal Article
Agricultural productivity and producer behavior
\"Agriculture plays a key role in economic growth and development. As recently as 1800, more than half the population in most European countries worked on farms and in fields, though this shifted with the industrial revolution. Agricultural efficiencies were not immediately apparent until the middle of the 20th century when yields began to increase and they have continued to grow at a steady pace since. At the same time, inflation-adjusted agricultural commodity prices have been trending downward as increases in supply outpaced increases in demand. Food is an essential good, and while its price is currently low due to its abundance, it is responsible for a large consumer surplus given the highly inelastic demand. Understanding the factors that contribute to the upward trend in yields is of first-order importance for food security and human welfare. This book contains eight chapters that examine the factors behind the remarkably steady increase in yields around the globe, in order to better understand whether this trend can continue into the future and whether it will impose significant environmental externalities. The volume provides fresh and original analyses using methodological innovations to analyze recently available micro-level data sets\"-- Provided by publisher.
Book
Awakening Africa's sleeping giant : prospects for commercial agriculture in the Guinea Savannah zone and beyond
Awakening Africa's Sleeping Giant' explores the feasibility of restoring international competitiveness and growth in African agriculture through the identification of products and production systems that can underpin rapid development of a competitive commercial agriculture. Based on a careful examination of the factors that contributed to the successes achieved in Brazil and Thailand, as well as comparative analysis of evidence obtained through detailed case studies of three African countriesMozambique, Nigeria, and Zambiathe authors argue that opportunities abound for farmers in Africa to regain international competitiveness, especially in light of projected stronger world markets for agricultural commodities over the long term. This provides reasons for optimism regarding the future prospects for agriculture as a major source of inclusive growth in many parts of Africa.
eBook
Enhancing agricultural innovation : how to go beyond the strengthening of research systems
An innovation system can be defined as a network of organizations, enterprises, and individuals demanding and supplying knowledge and bringing it into a social and economic use. This book's primary aim is to focus on the largely unexplored operational aspects of the innvoation systems concept and to explore its potential for agriculture.
eBook
Solving real world problems with agricultural engineering
This book introduces readers to the importance of agricultural engineering, explaining the ways that agricultural engineers are making a difference in the world and emphasizing the variety of work available in this field.
Book
Agricultural Productivity and Structural Transformation: Evidence from Brazil
We study the effects of the adoption of new agricultural technologies on structural transformation. To guide empirical work, we present a simple model where the effect of agricultural productivity on industrial development depends on the factor-bias of technical change. We test the predictions of the model by studying the introduction of genetically engineered soybean seeds in Brazil, which had heterogeneous effects on agricultural productivity across areas with different soil and weather characteristics. We find that technical change in soy production was strongly labor-saving and led to industrial growth, as predicted by the model.
Journal Article