Increase In Vegetable Production Research Articles

Less than 4% of dryland areas are projected to desertify despite increased aridity under climate change

Drylands have low biological productivity compared to non-drylands, making many human activities within them sensitive to long-term trends. Trends in the Aridity Index over several decades indicate increasing aridity in the drylands, which has been linked to increasing occurrence of desertification. Future projections show continued increases in aridity due to climate change, suggesting that drylands will expand. In contrast, satellite observations indicate an increase in vegetation productivity. Given the past inconsistency between the Aridity Index changes and observed vegetation changes, the future evolution of vegetation productivity within the drylands remains an open question. Here we used a data driven approach to show that increasing aridity in drylands won’t lead to a general loss of vegetation productivity. Most of the global drylands are projected to see an increase in vegetation productivity due to climate change through 2050. The aridity index will not be a good indicator of drylands in future climates. We found a broad boost to dryland vegetation productivity due to the carbon dioxide (CO2) fertilization effect that is negated by climate changes in at most 4% of global drylands to produce desertification. These regions include parts of north-east Brazil, Namibia, western Sahel, Horn of Africa and central Asia.

Анализ тенденций развития традиционных промыслов коренных народов в условиях климатических изменений (на примере Новосибирских островов и прибрежных арк­тических районов Якутии)

The article considers the possible positive impact of climate change in the Arctic zone of Russia on the traditional trades of indigenous peoples. The authors have carried out an analysis of trends in the development of fossil mammoth bone and wild reindeer extraction against the background of climatic changes occurring in the region. They have revealed that climate changes in the area of the Novosibirsk Islands archipelago and coastal Arctic regions contribute to an increase in vegetation productivity, thus creating new conditions for the development of reindeer husbandry and an increase in the number of wild reindeer. Based on the MODIS satellite image-processing model, the researchers have estimated the changes in the food supply of wild reindeer on the Novosibirsk Islands for the period 2000-2021. The results show that the degradation of permafrost rocks under conditions of climate change contributes to the development of traditional activity of indigenous peoples in the field of collecting fossil animal derivatives. The authors have confirmed the hypothesis about the positive impact of climate change on these areas of traditional activity by data on the dynamics of allocated quotas for the production of wild reindeer in 2010-2023, as well as data on issued and current licenses for the collection of fossil mammoth bones in the Republic of Sakha (Yakutia) for 2016-2024. Basing on the results, the authors suggest developing traditional trades of indigenous peoples in the Arctic zone of the country and elaborating adaptation measures for the local population to the climate change processes.

ПРОИЗВОДСТВО ОВОЩЕЙ: СОСТОЯНИЕ ОТРАСЛИ И ПЕРСПЕКТИВЫ РАЗВИТИЯ

The scientific article conducted a theoretical study on the issues of ensuring the efficiency of vegetable production, the development of the vegetable growing industry, and providing the population with vegetable growing products. The dynamics of sown areas over the past 25 years is presented. It was revealed that the largest share in the structure of sown areas is occupied by potato plantings, while in dynamics over 25 years, plantings have decreased by almost half. The smallest share in the structure of sown areas is occupied by the cultivation of industrial crops. Their share in the structure of sown areas has almost doubled over the past 25 years. From 10 to 20 percent of the sown area is used for planting vegetables; in the period under study, their area almost doubled. An analysis of the dynamics of the yield of open-ground vegetables showed that over the past 25 years it has almost doubled (from 143 c/ha to 242 c/ha). It is shown that the gross harvest of open-ground vegetables has been trending upward over the past 25 years, with an increase of about 15 percent. It was revealed that in the period from 2007 to 2019, there was an increase in vegetable production per capita by 21.5 percent. Consumption of vegetables exceeds its production within the country; during the study period it increased by 17.4 percent. It was noted that vegetable import indicators are ahead of export indicators. In 2019, vegetable exports were almost 15 times higher than in 1996.

Pairing remote sensing and clustering in landscape hydrology for large-scale change identification: an application to the subarctic watershed of the George River (Nunavik, Canada)

Abstract. For remote and vast northern watersheds, hydrological data are often sparse and incomplete. Landscape hydrology provides useful approaches for the indirect assessment of the hydrological characteristics of watersheds through analysis of landscape properties. In this study, we used unsupervised geographic object-based image analysis (GeOBIA) paired with the fuzzy c-means (FCM) clustering algorithm to produce seven high-resolution territorial classifications of key remotely sensed hydro-geomorphic metrics for the 1985–2019 time period, each with a frequency of 5 years. Our study site is the George River watershed (GRW), a 42 000 km2 watershed located in Nunavik, northern Quebec (Canada). The subwatersheds within the GRW, used as the objects of the GeOBIA, were classified as a function of their hydrological similarities. Classification results for the period 2015–2019 showed that the GRW is composed of two main types of subwatersheds distributed along a latitudinal gradient, which indicates broad-scale differences in hydrological regimes and water balances across the GRW. Six classifications were computed for the period 1985–2014 to investigate past changes in hydrological regime. The time series of seven classifications showed a homogenization of subwatershed types associated with increases in vegetation productivity and in water contents in soil and vegetation, mostly concentrated in the northern half of the GRW, which were the major changes occurring in the land cover metrics of the GRW. An increase in vegetation productivity likely contributed to an augmentation in evaporation and may be a primary driver of fundamental shifts in the GRW water balance, potentially explaining a measured decline of about 1 % (∼ 0.16 km3 yr−1) in the George River’s discharge since the mid-1970s. Permafrost degradation over the study period also likely affected the hydrological regime and water balance of the GRW. However, the shifts in permafrost extent and active layer thickness remain difficult to detect using remote-sensing-based approaches, particularly in areas of discontinuous and sporadic permafrost.

Increased Vegetation Productivity of Altitudinal Vegetation Belts in the Chinese Tianshan Mountains despite Warming and Drying since the Early 21st Century

Gaining a deep understanding of how climate change affects the carbon cycle in dryland vegetation is of utmost importance, as it plays a pivotal role in shaping the overall carbon cycle in global ecosystems. It is currently not clear how plant communities at varying elevations in arid mountainous regions will respond to climate change in terms of their productivity. The aim of this study was to investigate the effect of climate change on vegetation productivity in different altitudinal vegetation belts of the Tianshan Mountains between 2000 and 2021, utilizing satellite-derived vegetation productivity and climate data. The findings suggest a notable increase in vegetation productivity across diverse altitudinal vegetation belts. The productivity of vegetation in the coniferous forest and alpine meadow belts displayed a notably higher interannual trend compared to other vegetation belts. Notably, an increase in vegetation productivity was accompanied by warming and drying. The productivity of altitudinal vegetation belts, however, appears to be resilient to current climate trends and was not significantly impacted by the severity of atmospheric drought. The trend of increased vegetation productivity was primarily driven by CO2 fertilization. Our results highlight that the extent of climate change may need to reach a threshold to noticeably affect variations in vegetation productivity in arid mountainous.

Drivers of soil nitrogen availability and carbon exchange processes in a High Arctic wetland

Increased soil nutrient availability, and associated increases in vegetation productivity, could create a negative feedback between Arctic ecosystems and the climate system, thereby reducing the contribution of Arctic ecosystems to future climate change. To predict whether this feedback will develop, it is important to understand the environmental controls over nutrient cycling in High Arctic ecosystems and their impact on carbon cycling processes. Here, we examined the environmental controls over soil nitrogen availability in a High Arctic wet sedge meadow and how abiotic factors and soil nitrogen influenced carbon dioxide exchange processes. The importance of environmental variables was consistent over the 3 years, but the magnitudes of their effect varied depending on climate conditions. Ammonium availability was higher in warmer years and wetter conditions, while drier areas within the wetland had higher nitrate availability. Carbon uptake was driven by soil moisture, active layer depth, and variability between sampling sites and years ( R2 = 0.753), while ecosystem respiration was influenced by nitrogen availability, soil temperature, active layer depth, and sampling year ( R2 = 0.848). Considered together, the future carbon dioxide source or sink potential of high latitude wetlands will largely depend on climate-induced changes in moisture and subsequent impacts on nutrient availability.

Vegetation as the catalyst for water circulation on global terrestrial ecosystem

Global climate change is expected to further intensify the global water cycle, leading to more rapid evaporation and more intense precipitation. At the same time, the growth and expansion of natural vegetation caused by climate change and human activities create potential conflicts between ecosystems and humans over available water resources. Clarifying how terrestrial ecosystem evapotranspiration responds to global precipitation and vegetation facilitates a better understanding of and prediction for the responses of global ecosystem energy, water, and carbon budgets under climate change. Relying on the spatial and temporal distribution of evapotranspiration, precipitation, and solar-induced chlorophyll fluorescence (SIF) from remote sensing platforms, we decouple the interaction mechanism of evapotranspiration, precipitation, and vegetation in linear and nonlinear scenarios using correlation and partial correlation analysis, multiple linear regression analysis, and binning. Major conclusions are as follows: (1) As a natural catalyst of the global water cycle, vegetation plays a crucial role in regulating the relationship between climate change and the water‑carbon-energy cycle. (2) Vegetation, a key parameter affecting the water cycle, participates in the entire water cycle process. (3) The increase in vegetation productivity and photosynthesis plays a dominant role in promoting evapotranspiration in vegetated areas, while the increase in precipitation dominates the promotion of evapotranspiration in non-vegetated areas.

Permafrost thaw induces short-term increase in vegetation productivity in northwestern Canada.

Over the past several decades, various trends in vegetation productivity, from increases to decreases, have been observed throughout Arctic-Boreal ecosystems. While some of this variation can be explained by recent climate warming and increased disturbance, very little is known about the impacts of permafrost thaw on productivity across diverse vegetation communities. Active layer thickness data from 135 permafrost monitoring sites along a 10° latitudinal transect of the Northwest Territories, Canada, paired with a Landsat time series of normalized difference vegetation index from 1984 to 2019, were used to quantify the impacts of changing permafrost conditions on vegetation productivity. We found that active layer thickness contributed to the observed variation in vegetation productivity in recent decades in the northwestern Arctic-Boreal, with the highest rates of greening occurring at sites where the near-surface permafrost recently had thawed. However, the greening associated with permafrost thaw was not sustained after prolonged periods of thaw and appeared to diminish after the thaw front extended outside the plants' rooting zone. Highest rates of greening were found at the mid-transect sites, between 62.4° N and 65.2° N, suggesting that more southernly sites may have already surpassed the period of beneficial permafrost thaw, while more northern sites may have yet to reach a level of thaw that supports enhanced vegetation productivity. These results indicate that the response of vegetation productivity to permafrost thaw is highly dependent on the extent of active layer thickening and that increases in productivity may not continue in the coming decades.

THE SEEDLING GROWTH RESPONSE OF PISUM SATIVUM L. TO DIFFERENT TYPES OF COMPOST

The constant increase in the high number of population, anthropogenic and industrial activities are alarming issues and raise food security issues around the world. The treatment of compost acts as an effective and environmentally friendly tool for an increase in vegetable production. This research article records the effects of three soil compost treatments (1) dry leaves (Ficus bengalensis L.), (2) solid waste (mustard oil cake) and (3) chicken manure, alone and in combination, with seedling growth performances of pea in pot culture experiments with five replications. The results showed that soil compost treatments showed a significant (p < 0.05) impact on the physicochemical features of soil and the physiological characteristics of pea (Pisum sativum L.). Soil compost analysis revealed a difference in soil porosity and pH, electrical conductivity, organic matter, total organic carbon, CaCO3, Na+, K+, phosphorous and nitrogen. Plant tissue analysis of pea seedlings also showed different levels of sodium, potassium and phosphorous values. The findings of the present research work concludes that the treatment of F. bengalensis dry leaves (25%) + garden loam (75%) treatment produced maximum growth performance, and the mustard oil cake solid waste (25%) + garden loam (75%) treatment showed the lowest seedling growth performance. The F. bengalensis dry leaves (25%) + garden loam (75%), soil compost application treatment showed the maximum seedling height of pea. The solid waste (SW) mixed with garden loam (GL) (SW 25% + GL 75%) and mustard oil cake solid waste alone treatment showed the lowest seedling growth of pea. The F. bengalensis dry leaves 25% + garden loam 75% compost treatment also influenced on the soil properties.

CO2 fertilization enhances vegetation productivity and reduces ecological drought in India

Higher warming will affect more regions globally with intensified agricultural and ecological droughts. Higher CO2 concentration improves vegetation’s water use efficiency (WUE), but its potential to alleviate extreme agricultural and ecological droughts is unclear. India is the second-highest contributor to global greening, having two of the eight global hottest biodiversity hotspots. Here, for the first time, using the CMIP6 earth system models (ESMs), we found an increase in the net vegetation productivity in India at the rate of 10.552 TgC year−1 with 1% per year increase in atmospheric CO2 concentration from 285 ppm to 1140 ppm, contrary to global trends. The improved WUE resulting from carbon fertilization and higher rain under warming will supersede the increased evapotranspiration water loss due to radiative effects. We found that the substantial increase in vegetation productivity in India attributes to plant physiology, and such factor needs to be considered in the drought projections.

Overestimated global dryland expansion with substantial increases in vegetation productivity under climate warming

Drylands are serviced as an essential component of the earth’s ecosystem. The potential changes in dryland areas are of great importance to the environment, but various debates remain as to whether and to what extent drylands are expected to expand. Here we employ a physically-based potential evapotranspiration (E P) model accounting for vegetation response to climate change to quantify potential changes in dryland areas, on the basis of a commonly used indicator, aridity index (multiyear mean E P over precipitation). Results show that by the end of this century, drylands will expand slightly by ∼5%, while vegetation productivity will increase by ∼50%. Elevated CO2 slows down the increase rate of E P that impedes the expansion of drylands, but greatly promotes vegetation growth with increases in both leaf assimilation and canopy foliage. These findings improve our understanding of the potential changes in dryland and their ecological impacts in a warmer climate.

Can reintroduction of beavers improve insect biodiversity?

Ecosystem engineering species, such as beavers, may help the restoration of biodiversity. Through the building of dams and lodges and altering the natural hydrology, beavers change the habitat structure and create multiple habitats that facilitate a wide variety of other organisms including terrestrial invertebrate communities. Here we study the effect of beaver reintroduction in Klosterheden in Denmark on biomass of flying invertebrates and diversity of moths. Further, aerial photos were used to assess riparian structure and productivity using the normalized difference vegetation index (NDVI). Our findings show that the presence of beavers affected flying invertebrate biomass, but that this was dependent on time of the year. Further, a strong effect of presence of beavers was found on diversity of moths. The results also show an increase in vegetation productivity and structural heterogeneity at sites with presence of beavers. Overall, our results demonstrate the importance of beavers as important ecosystem engineers that affect invertebrate species composition and abundance, as well as riparian structure and productivity.

Analysis of cabbage production in Russia

Relevance. The article analyzes the indicators of white cabbage production in Russia (by districts, subjects of the federation and categories of farms).Methodology. The object of research is the market for the production of white cabbage. The subject of the study is the current state of white cabbage production. The information base of the study was made up of data from FAO, official state statistics, the Federal Customs Service, the Ministry of Agriculture of the Russian Federation, the Ministry of Finance of the Russian Federation, Parliamentary hearings of the State Duma Committee on Agrarian Issues, the Eurasian Economic Union, the Eurasian Economic Commission, operational online messages of federal and regional levels, materials of periodicals, scientific seminars, conferences, symposiums, reflecting various aspects of the problem under study.Results. In the industrial sector of vegetable growing, the acreage of cabbage of all types in 2021, in relation to 2020, decreased by 15.8%. Over the past ten years, there has been a decrease in acreage and gross cabbage harvest in farms of all categories. There are a number of systemic problems in Russian vegetable growing that limit the increase in vegetable production and negatively affect its effectiveness: weak technical and material equipment of a significant part of farms engaged in vegetable production, outdated technical base, insufficient provision of crops with seeds of domestic production. One of the leading roles in the implementation of the policy of food security and national independence is played by the selection and seed production of white cabbage. Sanctions make it possible to carry out import substitution of varieties and hybrids of white cabbage. To date, the main task is to abandon the import of seeds of foreign selection, and therefore it is important to focus on creating new hybrids that will be of high quality, good yield, as well as resistance to diseases and pests. Modern hybrids of breeding FGBNU FNTSO and Agrofirm "Poisk" according to the results of testing in leading agricultural organizations fully meet the requirements of the market and can take a worthy place in the fields in the Russian Federation.

Increased Global Vegetation Productivity Despite Rising Atmospheric Dryness Over the Last Two Decades

AbstractRising atmospheric dryness [vapor pressure deficit (VPD)] can limit photosynthesis and thus reduce vegetation productivity. Meanwhile, plants can benefit from global warming and the fertilization effect of carbon dioxide (CO2). There are growing interests to study climate change impacts on terrestrial vegetation. However, global vegetation productivity responses to recent climate and CO2 trends remain to be fully understood. Here, we provide a comprehensive evaluation of the relative impacts of VPD, temperature, and atmospheric CO2 concentration on global vegetation productivity over the last two decades using a robust ensemble of solar‐induced chlorophyll fluorescence (SIF) and gross primary productivity (GPP) data. We document a significant increase in global vegetation productivity with rising VPD, temperature, and atmospheric CO2 concentration over this period. For global SIF (or GPP), the decrease due to rising VPD was comparable to the increase due to warming but far less than the increase due to elevated CO2 concentration. We found that rising VPD counteracted only a small proportion (approximately 8.1%–15.0%) of the warming and CO2‐induced increase in global SIF (or GPP). Despite the sharp rise in atmospheric dryness imposing a negative impact on plants, the warming and CO2 fertilization effects contributed to a persistent and widespread increase in vegetation productivity over the majority (approximately 66.5%–72.2%) of the globally vegetated areas. Overall, our findings provide a quantitative and comprehensive attribution of rising atmospheric dryness on global vegetation productivity under concurrent climate warming and CO2 increasing.

Biophysical Determinants of Shifting Tundra Vegetation Productivity in the Beaufort Delta Region of Canada

Temperature increases across the circumpolar north have driven rapid increases in vegetation productivity, often described as ‘greening’. These changes have been widespread, but spatial variation in their pattern and magnitude suggests that biophysical factors also influence the response of tundra vegetation to climate warming. In this study, we used field sampling of soils and vegetation and random forests modeling to identify the determinants of trends in Landsat-derived Enhanced Vegetation Index, a surrogate for productivity, in the Beaufort Delta region of Canada between 1984 and 2016. This region has experienced notable change, with over 71% of the Tuktoyaktuk Coastlands and over 66% of the Yukon North Slope exhibiting statistically significant greening. Using both classification and regression random forests analyses, we show that increases in productivity have been more widespread and rapid at low-to-moderate elevations and in areas dominated by till blanket and glaciofluvial deposits, suggesting that nutrient and moisture availability mediate the impact of climate warming on tundra vegetation. Rapid greening in shrub-dominated vegetation types and observed increases in the cover of low and tall shrub cover (4.8% and 6.0%) also indicate that regional changes have been driven by shifts in the abundance of these functional groups. Our findings demonstrate the utility of random forests models for identifying regional drivers of tundra vegetation change. To obtain additional fine-grained insights on drivers of increased tundra productivity, we recommend future research combine spatially comprehensive time series satellite data (as used herein) with samples of high spatial resolution imagery and integrated field investigations.

A CONTEMPORARY SITUATION OF THE VEGETABLE GROWING AND ITS LOCATION ON ALTITUDE ZONES IN THE GANJA-GAZAKH ECONOMIC-GEOGRAPHICAL REGION

Purpose. One of the main issues disturbing all the countries in recent years is to ensure food security. İn this regard the development of the country's agriculture is very important. Depending on natural and economic factors agriculture has different development properties in the regions. Different programs have been realised to support the development of this sector nationwide. The main purpose of the research is territorial organisation, to determine the level of the development in vegetable growing and development properties according to height zones, to investigate the root of the problems, to find solutions to them. Research method. The analysis is based on the data of the Institute of Geography of the National Academy of Sciences of Azerbaijan and the State Statistics Committee and the works of the scientists having held research on economic and social fields. The situation of the vegetable growing in the last 10 years and its location according to the height zones, the effect of the economic reforms to the development of this sector in the region, existing problems and their solutions have been analysed in this research. Results. The development of the vegetable growing plays an important role in meeting daily demands for food and in providing the population with fresh vegetables all the year round. It is also of highly importance in population employment and in the increase of their income in the height zones. Though natural conditions in the height zones are available for cultivation of different vegetables, the development of plant cultivation also depends on the application of the innovative methods. Alongside with the increase in vegetable production, it will also lead to the absolute elimination of the imported goods and will ensure the increase in exporting potential. The application of intensive methods,the appropriate usage of highly productive vegetable sorts and local conditions will lead to the development of the vegetable growing and to the meeting of demands of the population in the country at the expense of local production. Scientific innovations. The organisation of the vegetable growing according to the height zones in the Ganja-Gazakh economic region have been investigated in the article for the first time. The situation of vegetable cultivation in this region in recent years has been investigated according to the statistical analysis and the survey in the region. The level of development in the vegetable growing and its location according to the height zones in the region has been analysed according to the statistical data. The analysis shows that there is a great potential for the development of the vegetable growing in this economic region and it affects positively the meeting of the demands in vegetable growing and the increase in exporting potential. However, there are factors negatively affecting the development of the vegetable cultivation and the high quality production. The inappropriate choice of vegetable types,seed choice, not paying attention to the sorts and sowing quality, agrochemical service, not struggling with illnesses and pests in time and other reasons have led to serious problems. In this regard purposeful measures must be taken to eliminate the problems mentioned and to achieve the highest development of vegetable cultivation in the Ganja-Gazakh economic region. Practical importance. The results of the resarch can be used in territorial organisation and the support of the development of the vegetable cultivation in the Ganja-Gazakh economic region.

Global quantification of the bidirectional dependency between soil moisture and vegetation productivity

Changes in soil moisture strongly affect vegetation growth, which may in turn feed back on soil moisture by directly affecting evapotranspiration and indirectly regulating precipitation. Previous studies often focused on the unidirectional effects of soil moisture on temporal vegetation dynamics, yet bidirectional dependencies have rarely been studied. Here we analyzed the bidirectional dependency between soil moisture and vegetation productivity during 2001–2020 at a global scale using the Granger causality, and revealed strong concurrent and lagged correlations between both variables in large areas globally. Bidirectional causality between soil moisture and vegetation productivity was identified over 66% of the vegetated land areas, while considering lagged effects and controlling for temperature and solar radiation. Unidirectional effects of vegetation productivity on soil moisture, and soil moisture on vegetation productivity, were observed for 22% and 12% of vegetated land areas, respectively. For areas characterized by uni- and bidirectional dependencies, 74% of the vegetation productivity and 48% of soil moisture could be explained by optimum lag models. Finally, we observed increases in both vegetation productivity and soil moisture in 44% of the vegetated land areas, yet 36% showed an increase in vegetation productivity but a decrease in soil moisture, indicating divergent responses between greening and water availability. Identification of areas showing Granger causality between soil moisture and vegetation productivity is important for our understanding of carbon-water interactions for terrestrial ecosystems under climate change and for improving sustainable management of ecosystem services linked to the carbon-water cycle.

Biophysical controls of increased tundra productivity in the western Canadian Arctic

Rapid climate warming has widely been considered as the main driver of recent increases in Arctic tundra productivity. Field observations and remote sensing both show that tundra “greening” has been widespread, but heterogeneity in regional and landscape-scale trends suggest that additional controls are mediating the response of tundra vegetation to warming. In this study, we examined the relationship between changes in vegetation productivity in the western Canadian Arctic and biophysical variables by analyzing trends in the Enhanced Vegetation Index (EVI) obtained from nonparametric regression of annual Landsat surface reflectance composites. We used Random Forests classification and regression tree modelling to predict the trajectory and magnitude of greening from 1984 to 2016 and identify biophysical controls. More than two-thirds of our study area showed statistically significant increases in vegetation productivity, but observed changes were heterogeneous, occurring most rapidly within areas of the Southern Arctic that were: (1) dominated by dwarf and upright shrub cover types, (2) moderately sloping, and (3) located at lower elevation. These findings suggest that the response of tundra vegetation to warming is mediated by regional- and landscape-scale variation in microclimate, topography and soil moisture, and physiological differences among plant functional groups. Our work highlights the potential of the joint analysis of annual remotely sensed vegetation indices and broad-scale biophysical data to understand spatial variation in tundra vegetation change.

Spatiotemporal variations of global terrestrial vegetation climate potential productivity under climate change

Evaluating the climate potential productivity (CPP) of terrestrial vegetation is crucial to ascertain the threshold of vegetation productivity, to maximize the utilization of regional climate resources, and to fully display the productivity application level. In this study, the maximum net primary productivity (NPPmax) representing the highest possible productivity of vegetation was calculated using the FLUXNET maximum gross primary productivity (GPPmax) from 177 flux towers. The relationships between NPPmax and a set of climate variables were established using the classification and regression tree (CART) modeling framework. The CART algorithm was used to upscale the CPP to the global scale under the current climate baseline (1980–2018) and future climate scenarios. The spatiotemporal variations in CPP over the globe were analyzed and the impacts of climate factors on it were assessed. The results indicate that global CPPs range from 0 to 2000 g C/m2. The tropical rainforest area is the region with the highest CPP, whereas the lowest CPP occurs in arid/semiarid areas. These two regions were identified as the areas with the largest CPP reductions in the future. The findings reveal that CPP shows signs of productivity saturation and that future climate is not conducive to the increases in vegetation productivity in these regions. The increases in average annual temperature, minimum temperature, and solar radiation are beneficial to CPP increase in most parts of the globe under climate change. However, the negative contribution of maximum temperature increase and precipitation reduction to CPP is higher than the positive contribution of the above three rising factors to CPP in tropical and arid/semiarid areas. Our study is important to aid in creating targeted policies for future sustainable development, resource allocation, and vegetation management.

Potential for Vegetable Production Towards Food Security in Arabian Peninsula: A Case Study of Oman

Introduction: In Oman, the weather is not conducive to year-round cultivation of vegetables. However, these are dual-purpose commodities because they can be grown to achieve food security goals as well as serve as cash crops that generate employment and income. Increasing vegetable production in Oman has the potential to contribute to the government’s economic diversification efforts. Technical efficiency analysis for selected crops indicated the ability to improve crops’ production with the present state of technology in-line with regional food security objectives. Materials and Methods: Relevant documents about cultivating vegetables in terms of area, production, price structure, and other factors were extensively researched, analyzed, and presented in tables and figures to show their present and future trends. Researchers surveyed about 118 randomly selected farms across Oman. They also evaluated Technical Efficiency (TE) using a Trans-Logarithmic function (TL) and Cobb Douglas (CD) function with SHAZAM comprehensive economics and statistics package to achieve meaningful results. Results: The results include retrospective analysis of area and production of different vegetables cultivated in Oman and their import and export, their price, and its potential increase in vegetable production in Oman for economic diversification in domestic consumption and export markets. They also identified trends in organic vegetable cultivation, and sales showed the potential to increase production levels and assist government efforts to increase agriculture’s contribution to the gross domestic product of Oman. Technical efficiency for tomato in selected samples indicated the ability to improve production beyond 20% with the present state of technology. Conclusion: Analysis of data on ordinary vegetable cultivation established that the outlook for global vegetable supply and demand is attractive. The global demand for vegetables, is increasing and will continue to do so. Moreover, growth is especially strong in demand for organic vegetables in wealthier countries such as Switzerland, Sweden, and the United Arab Emirates. Technical efficiency analysis indicated a potential increase in the production of vegetables with the present state of technology.