Agricultural Land In Areas Research Articles

Implications of current soil phosphorus levels for manureshed analysis in North Carolina

AbstractManure relocation strategies are needed to mitigate excessive phosphorus (P) application to agricultural land in areas of intensive animal agricultural production. This requires conceptual frameworks such as the manureshed, which categorizes agricultural areas according to the potential to export or receive manure for P fertilization. To further understand how the manureshed concept could be utilized, assessments of the potential implementation and necessity of the manureshed model are needed. With North Carolina at the center of the largest manureshed in the United States, North Carolina is an ideal test case to identify areas of concern for manure relocation under the manureshed framework. Swine and poultry dominate North Carolina's agricultural production, and because the vast majority of North Carolina producers are not required to limit manure applications to a P‐based rate, P accumulates. Therefore, soil test data from samples submitted to the North Carolina Department of Agriculture and Consumer Services (NCDA&CS) from 2017 to 2019 were used to determine how manureshed classes defined by Spiegal et al. correspond to current soil test P levels. It was determined that 36% of counties experience very high (>100 mg P kg−1; N = 36) median P concentrations in soil. Furthermore, fields cultivated with warm‐season forages had the highest mean P concentration (188 mg kg−1) and high median P trended toward counties with high animal production. Lastly, while mean soil P for all manureshed classifications fell into the very high category, manure source counties had the highest mean soil P concentrations (188 mg kg−1), which was 39%–52% higher than the other classifications. This suggests that, in addition to manuresheds classification, soil test data are needed to design and promote manure redistribution strategies.

Alih Fungsi Lahan Persawahan Menjadi Perumahan di Kabupaten Jember Berdasarkan Peraturan Daerah Kabupaten Jember Nomor 1 Tahun 2015 Tentang Rencana Tata Ruang Wilayah Kabupaten Jember Tahun 2015-2035

Indonesia as an agricultural country is a country rich in agriculture. Land is a very important part of everyday life, the main function of land is as a place to live, apart from that land can be used for plantations, industry and many other uses such as social functions. As settlements become increasingly dense and more land is converted into housing and settlements, the amount of land is decreasing, the problems arising from land conversion activities are very worrying, so this case is very concerning. This research uses a statutory and conceptual approach with a normative juridical research type. The conversion of rice fields into housing in Jember Regency is based on Jember Regency Regional Regulation Number 1 of 2015 concerning Jember Regency Spatial Planning for 2015-2035. Jember Regency is one of the administrative regions of East Java Province. Most of the Jember Regency area is lowland, with an average land height of 83 meters above sea level and is an area that is quite fertile and very suitable for the development of agricultural commodities and plantations, so it is known as an area or food barn and a country's foreign exchange earner in the agricultural sector. East Java Province. However, agricultural land in Jember Regency has experienced many changes, characterized by increasingly narrow agricultural land. The narrowing of agricultural land in Jember Regency is due to housing construction which is increasing every year. The conversion of land in agricultural areas not only results in rice yields, but many other productions have to be sacrificed.

IMPORTANCE OF EROSION IN INFLUENCING SOIL FERTILITY IN CROP IRRIGATION

At present, research and development activities aimed at developing new scientific and technical solutions for the effective use of land resources, the organization of optimal use of agricultural land in areas affected by erosion and at risk of erosion in land development projects are being carried out. In this direction, among other things, reducing the harmful effects of the environment in areas with the risk of water and wind erosion, improving the methods of effective use of each plot of land, taking into account the natural and economic conditions and the requirements for the protection of land from erosion, geosystem complexes that allow to prevent erosion in land formation. development, efficient use of land, protection of soils from erosion, creation of technologies that allow to increase the productivity of land is considered urgent. In this regard, special attention is paid to studies aimed at improving the efficiency of work in determining the composition of land types attached to land users and methods aimed at their optimization. Based on this, the main task of today's region is the wide use of modern economical technologies and the possibilities of their application to production, analysis of problem solving, and elimination of excess costs.

Analisis Spasial Pengaruh Alokasi Ruang dan Pola Kepemilikan Lahan terhadap Konversi Lahan Sawah: Studi Kasus Kecamatan Rajeg

Tangerang Regency is one of the regencies in Banten Province, which has a fairly established agricultural system with fertile land potential for the agricultural sector. The central government has prioritized the regenciy’s rice field are as one of the food barns of Indonesia. Rajeg District is one of nine districts in Tangerang Regency that has been designated as a food barns. Land conversion has been a threat in implementing stable and sustainable food security. Significantly, conversion of paddy fields can affect the availability of food and inventory of rice fields. The purpose of this study is to analyze the spatial pattern of land use change conversion using the Landscape Metrics method. Data used in this research are secondary data, including land use maps of 2005, 2012, and 2018, spatial pattern maps of Tangerang Regency Spatial Plan (RTRW) 2011-2031, and maps of land ownership status in Rajeg District. Result of the analysis shows that the largest conversion of land use change occurs in paddy fields into developed land in agricultural areas with unregistered land ownership status (not registered and not certified). The characteristic of spatial pattern of this conversion type covers a wide conversion area with various forms of conversion geometry. Patch density tends to cluster (not fragmented). The built-up land formed in this type of conversion tends to be massive and in the form of clusters.

The Challenges of Managing Legacy Phosphorus Losses from Manure-Impacted Agricultural Soils

Historical application of manure to agricultural land in areas of intensive animal production, like the Delmarva Peninsula, has led to soil test phosphorus (STP) concentrations that far exceed agronomic optimum. While natural soils would typically serve as a sink for newly applied P sources, soils with P accumulation from long-term manure applications often serve as a source of P via a gradual release of dissolved P in runoff or leaching events. These losses of “legacy P” from manure-impacted soils are difficult to control and are linked to water-quality degradation in sensitive water bodies, like the Chesapeake Bay. In this review, we examine how long-term application of manure impacts soil P dynamics under P-buildup and -drawdown scenarios to better understand the behavior of legacy P in soils. We also examine the reasons that traditional best management practices (BMPs) fail to control legacy P losses from soils and discuss potential promising management strategies using the Delmarva Peninsula as a case study.

Dinâmica de Ocupação do Cerrado Nordestino pela Agricultura: 1990 e 2012

Resumo: O setor agropecuário tem sido um importante vetor do desenvolvimento regional e da própria economia brasileira. Neste sentido, o uso de indicadores e métodos para a identificação das fontes de crescimento da produção agrícola pode subsidiar a concepção de políticas mais adequadas para a gestão do uso das terras em fronteiras agrícolas, assim como orientar os investimentos em infraestrutura. A partir dos anos 1990 uma nova fronteira agrícola, apoiada em modernas bases de produção, está sendo aberta no País, no território conhecido como Cerrado Nordestino. Neste contexto, o objetivo principal é analisar a dinâmica de ocupação do Cerrado Nordestino pelas culturas temporárias entre 1990 e 2012. A análise foi realizada com auxílio do Modelo Shift-share, mas na escala municipal, o que permitiu a espacialização dos resultados e a identificação de áreas mais dinâmicas. A soja e o milho têm comandado a ocupação da fronteira agrícola.

Past and future carbon fluxes from land use change, shifting cultivation and wood harvest

Carbon emissions from anthropogenic land use (LU) and land use change (LUC) are quantified with a Dynamic Global Vegetation Model for the past and the 21st century following Representative Concentration Pathways (RCPs). Wood harvesting and parallel abandonment and expansion of agricultural land in areas of shifting cultivation are explicitly simulated (gross LUC) based on the Land Use Harmonization (LUH) dataset and a proposed alternative method that relies on minimum input data and generically accounts for gross LUC. Cumulative global LUC emissions are 72 GtC by 1850 and 243 GtC by 2004 and 27–151 GtC for the next 95 yr following the different RCP scenarios. The alternative method reproduces results based on LUH data with full transition information within <0.1 GtC/yr over the last decades and bears potential for applications in combination with other LU scenarios. In the last decade, shifting cultivation and wood harvest within remaining forests including slash each contributed 19% to the mean annual emissions of 1.2 GtC/yr. These factors, in combination with amplification effects under elevated CO2, contribute substantially to future emissions from LUC in all RCPs.

Ageing of atrazine in manure amended soils assessed by bioavailability to Pseudomonas sp. strain ADP

Animal manure is applied to agricultural land in areas of high livestock production. In the present study, we evaluated ageing of atrazine in two topsoils with and without addition of manure and in one subsoil. Ageing was assessed as the bioavailability of atrazine to the atrazine mineralizing bacteria Pseudomonas sp. strain ADP. Throughout an ageing period of 90days bioavailability was investigated at days 1, 10, 32, 60 and 90, where ~10(8) cells g(-1) of the ADP strain was inoculated to the (14)C-atrazine exposed soil and (14)CO2 was collected over 7days as a measure of mineralized atrazine. Even though the bioavailable residue decreased in all of the three soils as time proceeded, we found that ageing occurred faster in the topsoils rich in organic carbon than in subsoil. For one topsoil rich in organic carbon content, Simmelkær, we observed a higher degree of ageing when treated with manure. Contrarily, sorption experiments showed less sorption to Simmelkær treated with manure than the untreated soil indicating that sorption processes are not the only mechanisms of ageing. The other topsoil low in organic carbon content, Ringe, showed no significant difference in ageing between the manure-treated and untreated soil. The present study illustrates that not simply the organic carbon content influences adsorption and ageing of atrazine in soil but the origin and composition of organic matter plays an important role.

Populus genus for the biomass production for energy use: a review

Much attention is currently focused on biomass production as one possible alternative energy source because of the need to increase the amount of energy produced in Spain from renewable energy sources. Amongst the different types of biomass available, those crops which are specifically designed for the purpose, the so-called «energy crops», allow us not only to plan the production of this resource but also to provide a viable alternative for agricultural land in areas where traditional crops are gradually being abandoned. The objective of this study is to revise the current knowledge base in relation to Populus spp.; a woody crop with great potential for this purpose which can be grown at high densities in short rotation coppices. Its suitability for the production of energy producing biomass will be assessed, focusing in particular on the base material to be employed, the plantation design and the cultural treatments to be applied.

Drainage by wells — an investigation in the Patterson Water District

A ground-water study was undertaken to investigate the feasibility of controlling water levels and draining agricultural land in areas of the west side of the San Joaquin Valley, California. The region selected for the field study was south of the town of Patterson, in Stanislaus County. Ground-water levels in the area had been rising due to intensive irrigation coupled with increased underground flow from new irrigated land which had been developed with water from the Delta-Mendota Canal. A test well, 10 shallow observation wells, and 21 deep piezometer holes were drilled. Well logs were recorded and correlated with general geologic information. The water quality in the te t well was determined periodically from 1959 to 1961. Shallow watertable level and deep piezometric-table levels were recorded continuously from October 1959 to July 1961. Several pumping and recovery tests were run and conventional as well as new methods of well hydraulic analysis were applied to the test data. An optimum pattern and spacing were computed for the proposed drainage wells.