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The coefficients indicate that all three inputs impacted knowledge production positively

Expenditures on salaries act as an incentive system to make the current advisor FTE more productive, which enhances productivity, as is indicated by our results. Expenditures on infrastructure have a positive impact on knowledge production before the threshold level is reached, beyond which the impact becomes negative. In this respect, our findings for the extension system in California suggest that the research and dissemination by agricultural extension is similar to that of a research only system. The quadratic behavior of the expenditures on infrastructure was found significant, with a negative sign for the quadratic term. This finding is similar to the results in Roper and Hewitt-Dundas , Jordan and O’Leary , and Charlot et al. . Such results suggest an inverse U-shaped relationship between knowledge production and fixed infrastructure investment. The support in findings on the inverse U-shaped impact of research infrastructure on knowledge production we get from literature on non-agricultural research, is very helpful for validating the results in our analysis with focus on agricultural research and extension in California.We found that expenditures on infrastructure per-unit FTE as a research input has diminishing marginal effects on knowledge production. Marginal product of advisor FTE calculated at the mean value of the input and knowledge index equals 106.33; this implied that one unit increase in county FTE led to nearly 106 additional counts of knowledge production. Marginal products of expenditures on salaries per FTE and infrastructure per FTE are 0.003and −0.0003,respectively. Marginal products values calculated at the mean emphasized the importance of advisor FTE as a research input.

hey also brought forward the issue of diminishing returns on investments in incentives and infrastructures. We conducted several robustness checks by running regression for models using each of the three broad categories of knowledge production and dissemination instead of the calculated knowledge index. The three broad categories are: direct contacts, indirect contact, and publications and research projects as dependent variables. The results of the robustness checks are reported in Appendix Tables A2, A3, and A4. The results suggest similar range of coefficients for each of the variables,hydroponic bucket similar signs and significance levels across the various estimated models. Thus, these results suggest that the empirical knowledge function we use is robust. Endogeneity, if exists, could be found in the sphere of budget allocation for extension work at the county level. It could be argued that level of budget allocation is a function of the agricultural performance of the county, and thus introducing endogeneity biases in our estimates. However, following interviews with county directors, decisions on budget allocations among the counties in California are made based on political negotiations between the county directors and the UCCE system. Furthermore, as suggested by Guttman , Rose-Ackerman and Evenson , Pardey and Pardey and Craig , political rather than just economics efficiency criteria influence the allocation of public agricultural research and extension resources.We have estimated the contemporaneous impact of UC Cooperative Extension on the production of knowledge through research and extension work that is conducted in all California counties. Available data on R&D expenditures and knowledge products was used to construct a unique data set for seven years, spanning from 2007 to 2013. The data contained information on extension advisor FTE, expenditures on advisor FTE salaries, and on advisor FTE infrastructure. We obtained data on a number of knowledge production and dissemination methods. They are categorized into 11 subcategories, and three broad categories.

We computed a weighted average knowledge index variable with the weights provided by UCCE county directors via an electronic survey. The contribution of this work is the quantification of extension research input and in the fact that the trends and relative importance of research variables found in an extension research and dissemination system in California are similar to previous results of the agricultural research system in the USA, and previous results from several industrial research and development activities around the world. Both these similarities suggest that a research and dissemination agricultural extension behaves similarly to industrial research systems. One limitation of the study is that we were able to capture only the contemporaneous impact of research inputs on the production and dissemination of knowledge, due to data constraints. With further availability of data, analysis of long-run impact will enable policymakers to make informed decisions on investments in research inputs. This will enable sustained knowledge production and dissemination. Another limitation of the study is the lack of information on components of the research inputs, such as attributing research outcomes and extension impact to advisors, rather than distinguishing among advisors, based on seniority and experience. Such a distinction related to university research was performed in a study by Gurmu et al. . Some potential issues with the variable specifications deserve a mention. The variable FTE includes UCCE county advisors. Incorporation of detailed data on knowledge produced and disseminated by UCCE specialists at the county level would provide a more complete picture of the knowledge production mechanism. Data on FTE experience and expertise could also refine our results and understanding of the input-output relationship. Research-based agricultural knowledge is one of the most important inputs in the enhancement of agricultural productivity , and evidence suggests significant impacts on current productivity from the past 35 years of research-based knowledge . Therefore, better understanding of relevant research inputs, environments in which substitution between inputs is viable, and long-term impact of shifts in investments in research inputs have a great deal of importance for policy purposes.

This paper poses and provides answers to some of these questions and indicates possible directions for future study on this issue. Another point to address is the international and national relevance of this work to the literature and to policy practitioners. California is a leader in agricultural production. California extension system is a leader in extension knowledge that feeds into the agricultural production in the state. Therefore, understanding the process of knowledge creation by agricultural extension in California is of interest to researchers and practitioners in other states and countries. The finding in this study suggests that data collection and analysis for public extension activities are essential for proper policy consideration of a public knowledge system, which faces budget pressure world-wide. While the coefficients estimated for the case of California represent California situation, the trends of the coefficients are general and relevant to other states and countries around the world. With the data challenges we faced in this study, our results indicate the importance of the policymaker to be able to quantify the process of knowledge production in the agricultural extension systems. California ranks first among the top five national agricultural producers,stackable planters according to the California Statistical Review 2014–15 , with crop cash receipts amounting $53.5 billion . Irrigated agriculture in California consumes on average about 85% of the available renewable water resources in the state . Agricultural extension plays a major role in keeping agriculture sustainable and profitable . Therefore, the need for a reliable system of data collection on agricultural extension activities and knowledge produced at the state and county levels would enhance the ability to identify the determinants of knowledge production by the extension system. Finally, we observed, as Pardey and Alston et al. also did, that the public budget allocated to agricultural and extension has declined over time. The lesser funding allocated to UCCE over time is not because knowledge has decreased; in fact, we claim that it is the opposite, knowledge production has declined because there was less funding due to recession or/and budgetary constraints in the University of California system as a result of financial difficulties faced by the state of California during the years we analyze.Human-altered landscapes are expanding globally and are often associated with declining natural habitat, non-native species, fragmentation, and transformations in structure, inputs, climate, and connectivity. These changes collectively have resulted in shifts in both spatial distributions and species diversity across many taxa including birds, mammals, reptiles, amphibians, invertebrates, and plants.

One common driver of global change is urbanization, which in the extreme is associated with a reduction in biodiversity compared to habitats in their more natural state. However, in moderately urbanized areas, the effects of urban impacts on species distribution and diversity can vary greatly and depends on region, type of change, and taxonomic group, among other factors. Documenting the effects of urbanization compared to natural communities has proven problematic, making predictions of community change associated with urbanization difficult. Human-altered landscapes are often associated with many non-native species which add to species diversity but also can obscure changes in community dynamics. Thus, to assess accurately the complex impacts of land use change on ecological communities, one must look beyond species richness to investigate ecological processes themselves. Ecological processes are the links between organisms in a functioning ecosystem, and are critical in understanding how altered biodiversity can lead to changes in ecosystem functioning. Global environmental change has been found to have a wide variety of impacts on ecological processes in different systems. Pollinator-plant relationships in particular are found to be particularly vulnerable to land use change, resulting in decreases in interaction strength and frequency. Pollination services are crucial ecosystem processes in natural systems, but also in agricultural and urban areas. Bees provide the majority of animal-mediated pollination services on which it is estimated 87.5% of flowering plants depend. The value of pollination in agriculture is estimated at $200 billion worldwide, largely due to many foods that are essential for food security and a healthy human diet, including numerous fruits, vegetables, and nuts that require bee pollination. As urban areas expand, there has been increasing interest in urban agriculture to ensure food security and access to healthy foods for growing populations, and these systems also depend on pollination. For example, Kollin estimated that the economic value of urban fruit trees to be worth $10 million annually in San Jose, California. Despite the important role of pollinators and concerns about bee declines, there remain many uncertainties regarding the impact of land use change on pollinators. Urbanization has resulted in more interfaces with both natural and agricultural landscapes, creating new transitional zones of peri-urbanization. While there has been extensive pollinator research in agricultural and natural systems, less attention has focused on pollination in neighboring urban areas and how the changing landscape has impacted pollination. In addition, very few studies of urban areas have looked beyond changes in bee diversity to understand explicitly the effect of urbanization on pollinator-plant interactions. Here, we investigate the effect of land use change on pollinator plant ecosystem processes. We make use of a ‘‘natural experimental design’’ in which urban, agricultural, and natural areas intersect. Bees visit flowers for both pollen and nectar resources, and floral visitation is a commonly used as an index of pollination services. However, depending on the flower, certain bee groups are much more effective pollinators than others. Thus, while visitation is important, it alone does not definitively indicate whether pollination services were received by the plant. When pollen is limited by other factors, consequences for plant fitness can include failure to set seed, production of smaller fruits, and even complete lack of reproduction. By looking at rates of bee visitation and comparing this with other measures of plant fitness, such as seed set, we can develop a more complete understanding of how shifts in bee distributions between areas that differ in land use are impacting pollination services. To study the impact of changing land use on pollinator-plant interactions, we focus on bee pollination of a widespread plant, yellow starthistle , a common weed found in natural, agricultural, and urban habitats. Using standardized observations of floral visitation and seed set measurements of yellow starthistle, we test the hypotheses that increasing urbanization decreases 1) rates of bee visitation, 2) viable seed set, and 3) the efficiency of pollination . In addition to contributing to a better understanding of how change in landscape use, particularly urbanization, affects pollination-plant interactions, the study illustrates the importance of use of neighboring lands for pollination services.We observed visits by all bee species to yellow starthistle at all sites 3 times for a 30 min period for a total of 90 min of total observation time per site within the same 2 wk period in August 2011.

Additional litigation is working its way through the court system

The periodic renewal votes conducted for most programs reveal their popularity, with positive votes typically above 90 percent. A number of marketing programs have, however, encountered problems. As a group, the programs using quantity controls to practice price discrimination have lost governmental and legislative support, due to perceived adverse impacts on U.S. consumers. The programs with the strongest potential for increasing producer prices, including hops, lemons, Navel oranges, and Valencia oranges, have been terminated by the Secretary of Agriculture. Those orders with quantity controls nowadays use them infrequently.Informed observers agree that it will be very difficult to gain approval for a new marketing order with strong quantity controls. Programs compelling producer and handler support of commodity advertising programs have faced withering legal challenges in recent years based upon the argument that they represent an undue restriction on commercial free speech under the First Amendment to the U.S. Constitution. Two recent rulings on the issue by the U.S. Supreme Court have done little to clarify matters.If the courts find ultimately that producers and handlers cannot be compelled to support an industry’s advertising program, it will likely fail due to free-rider problems. If the courts decide in favor of mandatory support, current programs will continue and new programs may emerge. There will, however, be increased monitoring of program costs and benefits to assure program supporters that their funds are being well-spent. Research funding pressures may require commodity groups to increase their support for research programs, if they want research to be done. The mandated programs provide a proven means for commodity-based research support,blueberry grow pot and they may take on an increased research role, as has been done by the California strawberry industry.

California agricultural producers rely on foreign markets for a significant portion of their revenues and export relatively more than producers in other states do. The value of California agricultural exports totaled about $6.5 billion in 2002, or about 20 percent of the value of agricultural commodities produced in California.While it is not surprising that California’s export earnings exceed those of every other state since its farm cash receipts are the highest in the country, exports are relatively more important to California than to other states. While California accounts for 12 percent of national farm cash receipts , it accounts for an estimated 15 percent of total U.S. agricultural export revenue. To put these figures in an international context, the state of California exports more agricultural products than some leading agricultural countries do, including such countries as Chile and China. The annual value of Mexico’s agricultural exports is only slightly larger than California’s estimated value . California exports a wide variety of high-value specialty crops. As shown in table 1, the top six food product exports from California in 2002 were almonds, cotton, wine, table grapes, dairy, and oranges. The state is not a significant producer or exporter of grain crops such as corn, wheat, or soybeans. In fact, the state is a net importer of feed grains. Figure 1 highlights the diversity of California’s exports. The top five products account for just over one-third of California’s agricultural exports by value. Even when exports are aggregated into commodity groups, as opposed to individual products, the range of products exported by California is striking . According to UC Agricultural Issues Center statistics, fruit exports comprise 25 percent of the state’s agricultural exports, followed by field crops , tree nuts , vegetables , animal products and wine . This diversity of exports reflects California’s production diversity and differentiates the state from other important agricultural states in the U.S., which tend to produce only a few commodities. For instance, the agricultural sector in Iowa and Illinois is concentrated in just three commodities: corn, soybeans and hogs, which account for 70-80 percent of those states’ farm cash receipts.

Nebraska’s production of corn and cattle generates over 70 percent of that state’s farm receipts. Texas depends on the cattle sector, which produces 50 percent of its farm cash receipts . Of any other state in the U.S., the profile of Florida’s agriculture is perhaps most similar to California’s. While the value of agricultural production in Florida is about 25 percent of that in California, Florida’s agriculture is quite diversified and the state produces fruits, vegetables, and dairy products. However, Florida is not as dependent on foreign markets as California is; many of the state’s fruits and vegetables are sold domestically. Not surprisingly, this means that Florida’s growers tend to be more protectionist than growers in California. As we explain a little later, California growers have a great deal to gain from breaking down foreign barriers to trade in fruits and vegetables; this is less true for Florida growers. California’s exports are destined for a diverse group of relatively high income countries, with the exception of the increasingly important Chinese market. The major foreign markets for almonds and wine are in Europe, while significant markets for the other top commodities are in Canada, Mexico, and Asia. Penetration of these desirable markets is all the more impressive because these countries remain quite protectionist with respect to agriculture, as discussed in the next section. It is estimated that about 40 percent of California agricultural exports is destined for Asia, 20 percent to Europe, and 30 percent to North America. California exports nearly twice as much of its agricultural output to the relatively wealthy European Union markets compared to the U.S. as a whole .California agriculture faces a complex international trading environment, characterized by import tariffs, non-tariff trade barriers, new competitors, and relatively little traditional federal assistance compared to other states. In this section, we review the market environment in which California’s agricultural producers compete. Increasing foreign competition and relatively closed markets have created demand within California for both increased government support for agriculture , and further trade liberalization in foreign markets .

The internal contradictions between these positions have not been resolved. We argue later that California receives little benefit from the taxpayer dollars spent on foreign marketing; consequently, the California agricultural industry may wish to concentrate on achieving global trade liberalization even if this necessitates funding reductions for foreign marketing activities. In the last decade, the nominal value of total U.S. agricultural exports grew by about 30 percent. Exports of some commodities important to California grew more rapidly and some less rapidly than the national average. Over this time period, U.S. dairy exports increased by 265 percent and fresh vegetable exports increased by 73 percent. Figure 3 shows how the nominal values of some major California exports changed over the period 1995-2002. According to UC AIC and the Foreign Agricultural Service ,hydroponic bucket the fortunes of California’s commodities have been mixed; almonds and wine have fared somewhat better than tomatoes and raisins. While the total nominal value of California’s agricultural exports has declined by about 5 percent since 1995, this figure masks widely divergent trends across commodities, so no general conclusions can be drawn.In the 1990s the most significant import growth in world markets was in high valued and processed food products like those grown in California. The share of high value and processed agricultural products in world agricultural trade has increased from less than 40 percent in the early 1980s to well over 50 percent by the end of the 1990s . At the same time, the share of fruits and vegetables in world agricultural trade remained at about 17 percent from 1990 to 2001, with a dollar value of $69.8 billion in 2001, up from $51 billion in 1990 . The fact that fruit and vegetable trade did not increase any faster than total agricultural trade is very surprising given the growing per capita demand in developed countries for fresh fruits and vegetables. The stagnant share of fruit and vegetable trade no doubt reflects the high level of protectionism around the world for these food categories. For instance, two-tiered tariffs known as tariff-rate quotas are commonly used to restrict imports of fruits and vegetables. Worldwide, there are more than 350 TRQs placed on trade in fruits and vegetables, and more than 25 percent of all agricultural TRQs are concentrated in the fruit and vegetable trade . This phenomenon critically affects California agriculture. As an exporter of high-value food commodities, California must contend with the fact that import tariffs in important markets such as in the EU are generally higher on processed agricultural products than on the primary commodities. This tariff wedge between a processed commodity and its corresponding primary commodity is referred to as tariff escalation, and this is a significant obstacle to California exports. Tariff escalation produces a trade bias against processed agricultural products and value added products. There is general evidence of tariff escalation in OECD countries , especially for fruits, vegetables, and nuts—major California exports. For many countries, bound tariffs tend to be higher for processed food products than for unprocessed products . Furthermore, recent tariff reductions on agricultural products exceeded tarrif reductions on processed food products in Australia, Canada, the European Union and Mexico . Government transfers to the agricultural industry have contributed to the sector’s profitability in California, particularly for those farmers not growing nuts, fruits and vegetables.

Agricultural producers in California received $586 million in federal assistance in 2001; Of this about $242 million came as production flexibility contracts and loan deficiency payments. Supplemental funding of $258 million was paid directly to California farmers. The remainder of government payments to farmers came in the form of marketing support and conservation payments, which we discuss later in this chapter. While these federal government support payments are low in total compared to those states where the major agricultural products are grains or oil seeds, this does not imply that some agricultural producers in California do not benefit greatly from subsidies and protectionist measures.2 Over 100 farms in California received more than $425,000 each in subsidies in 2001 . Dairy, sugar and cattle producers receive significant protection from import barriers, and many producers receive subsidized inputs, particularly irrigation water. Sumner and Hart estimated the Producer Subsidy Equivalent paid to California agriculture in 1995 , where the PSE is defined as all government transfers to the industry including but not limited to production subsidies. They calculate that the California agricultural sector receives annual PSE transfers of $2.3 billion per year or about 11 percent of total commodity receipts. This is about one-half of the percentage PSE for all U.S. agriculture at the time, mainly because fruits and vegetables receive fewer transfers than the average commodity. However, California’s PSE is higher than the percentage PSE received by producers in liberalized markets like Australia and New Zealand where the 1995 PSE was about 3 percent. While the specific estimates of PSE vary over time, the general pattern identified by Sumner and Hart, that California producers have a lower PSE than the U.S. national average but higher than that for other agricultural exporters, holds today.The formation of the Canada-United States Free Trade Agreement in 1989 and the North American Free Trade Agreement in 1994, has led to greatly expanded agricultural trade between Canada, California’s top market, and the U.S. NAFTA was designed to integrate economic activity among three nations: Canada, the U.S. and Mexico. It serves as a free trade agreement rather than a customs union or common market. Since 1989, U.S. agricultural exports to Canada have expanded by about 3 and one-half times, from $2.24 billion to $7.65 billion. Over the same period, agricultural imports from Canada have risen almost three-fold, from $2.93 billion to $8.66 billion. Fruits and vegetables account for more than one-third of Canada’s agricultural imports from the U.S., so California plays an important role in this north south trade. However, in spite of the CUSTA and NAFTA, Canada continues to intervene in agricultural trade flows. The country uses non-tariff barriers such as licenses that restrict imports of bulk produce, fresh fruits, vegetables, and wine. For instance, Canadian regulations on fresh fruit and vegetable imports prohibit consignment sales of fresh fruit and vegetables without a prearranged buyer . Canada also severely limits imports of dairy products, eggs, and poultry. According to the WTO Appellate Body, Canada’s supply management system for dairy provides implicit export subsidies for these products . Producer groups in the U.S. have called for the greater use of non-tariff barriers to limit agricultural imports from Canada. This has often been accomplished by the use of U.S. trade remedy laws.