Prospects for cotton self-sufficiency in China by closing yield gaps

2022 ◽  
Vol 133 ◽  
pp. 126437
Author(s):  
Yucheng Wang ◽  
Shaobing Peng ◽  
Jianliang Huang ◽  
Yali Zhang ◽  
Lu Feng ◽  
...  
Keyword(s):  
Self Sufficiency ◽  
Yield Gaps

scholarly journals Para-organic intensification of future farming as alternative concept to reactor-based staple food production in Africa

2021 ◽  
Author(s):  
Daniel Neuhoff ◽  
Julius Kwesiga
Keyword(s):  
Organic Farming ◽  
Food Production ◽  
Farming Systems ◽  
Mineral Fertilizers ◽  
Staple Food ◽  
Research Activities ◽  
Self Sufficiency ◽  
Yield Gaps ◽  
Organic Farming Systems ◽  
Reasonable Use

AbstractCurrently, staple food self-sufficiency in Africa is just above 80%, and the population is expected to more than double until 2050. To cope with this challenge, technological solutions such as reactor food seem seductive. Western pilot projects have shown considerable production potentials, e.g., 7 t ha−1 of starch within 150 days by algae in reactors that may also be used in Africa. Are these approaches suitable for Africa justifying extensive research activities? Here, we argue that both physical availability of substrates and missing profitability substantially limit the development of reactor food in SSA, also in a mid-term perspective. It is rather suggested to close the considerable existing yield gaps by implementing para-organic farming systems, which combine basic principles of organic farming such as crop diversification, legume growing, and manuring, with a reasonable use of inputs, in particular mineral fertilizers. In combination with irrigation, staple food production in SSA has the potential to keep pace with growing demand.

scholarly journals Can Southeast Asia continue to be a major rice bowl?

2021 ◽  
Author(s):  
Shen Yuan ◽  
Alexander Stuart ◽  
Alice Laborte ◽  
Juan Rattalino Edreira ◽  
Achim Dobermann ◽  
...  
Keyword(s):  
Southeast Asia ◽  
Yield Potential ◽  
Land Resources ◽  
Yield Gap ◽  
Self Sufficiency ◽  
Potential Estimate ◽  
Yield Gaps ◽  
Yield Trends ◽  
High Level ◽  
Modelling Approach

Abstract Southeast Asia is a major rice-producing region, with high level of internal consumption and accounting for 40% of global rice exports. Limited land resources, climate change, and yield stagnation during recent years have once again raised concerns about the capacity of the region to meet the growing demand for rice and remain as a large net exporter. Here we use a modelling approach to map rice yield gaps and assess production potential and net exports by 2040. We find that the average yield gap represents 48% of the yield potential estimate for the region. Exploitable yield gaps are relatively large in Cambodia, Myanmar, Philippines, and Thailand, but comparably smaller in Indonesia and Vietnam. Continuation of current yield trends will not allow Indonesia and Philippines to meet their domestic rice demand. In contrast, closing the exploitable yield gap would allow all countries to achieve rice self-sufficiency, with an aggregated annual rice surplus of 100 million tons available for export. Our study provides insights for increasing regional production on existing cropland by narrowing existing yield gaps.

scholarly journals Small farms and development in sub-Saharan Africa: Farming for food, for income or for lack of better options?

Food Security ◽  
2021 ◽  
Author(s):  
Ken E. Giller ◽  
Thomas Delaune ◽  
João Vasco Silva ◽  
Mark van Wijk ◽  
James Hammond ◽  
...  
Keyword(s):  
Food Security ◽  
Food Insecurity ◽  
Farming Systems ◽  
Sub Saharan Africa ◽  
Farm Size ◽  
Small Farms ◽  
Self Sufficiency ◽  
Yield Gaps ◽  
Sub Saharan ◽  
Household Incomes

AbstractMost food in sub-Saharan Africa is produced on small farms. Using large datasets from household surveys conducted across many countries, we find that the majority of farms are less than 1 ha, much smaller than previous estimates. Farms are larger in farming systems in drier climates. Through a detailed analysis of food self-sufficiency, food and nutrition security, and income among households from divergent farming systems in Ethiopia, Ghana, Mali, Malawi, Tanzania and Uganda, we reveal marked contrasts in food security and household incomes. In the south of Mali, where cotton is an important cash crop, almost all households are food secure, and almost half earn a living income. Yet, in a similar agroecological environment in northern Ghana, only 10% of households are food secure and none earn a living income. Surprisingly, the extent of food insecurity and poverty is almost as great in densely-populated locations in the Ethiopian and Tanzanian highlands that are characterised by much better soils and two cropping seasons a year. Where populations are less dense, such as in South-west Uganda, a larger proportion of the households are food self-sufficient and poverty is less prevalent. In densely-populated Central Malawi, a combination of a single cropping season a year and small farms results in a strong incidence of food insecurity and poverty. These examples reveal a strong interplay between population density, farm size, market access, and agroecological potential on food security and household incomes. Within each location, farm size is a major determinant of food self-sufficiency and a household’s ability to rise above the living income threshold. Closing yield gaps strongly increases the proportion of households that are food self-sufficient. Yet in four of the locations (Ethiopia, Tanzania, Ghana and Malawi), land is so constraining that only 42–53% of households achieve food self-sufficiency, and even when yield gaps are closed only a small proportion of households can achieve a living income. While farming remains of central importance to household food security and income, our results help to explain why off-farm employment is a must for many. We discuss these results in relation to sub-Saharan Africa’s increasing population, likely agricultural expansion, and agriculture’s role in future economic development.

scholarly journals Closing yield gaps for rice self-sufficiency in China

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Nanyan Deng ◽  
Patricio Grassini ◽  
Haishun Yang ◽  
Jianliang Huang ◽  
Kenneth G. Cassman ◽  
...  
Keyword(s):  
Self Sufficiency ◽  
Yield Gaps

CONCEPTUAL POSITIONS OF MODERNIZATION OF EXISTING INEFFICIENT DISTRICT HEATING SYSTEMS

2017 ◽  
pp. 11-21
Author(s):  
Ye.Ye. Nikitin
Keyword(s):  
Energy Efficient ◽  
Mutual Influence ◽  
District Heating ◽  
Current Status ◽  
Cognitive Approach ◽  
Heating Systems ◽  
Energy Management Systems ◽  
Current State ◽  
Self Sufficiency ◽  
District Heating Systems

The current situation in the sphere of district heating is analysed on the basis of use of the cognitive approach. The presence of closed chains of cause-effect relationships of negative factors and conflicts of target settings of the subjects in the field of district heating is shown. The conceptual model of energy efficient modernization of district heating systems is proposed. This model includes indicators of the current status of heat sources, networks and heat consumers, energetic and economic models, restrictions, procedure of forming and analysis of the mutual influence of the recommended projects. The quantitative data on indicators of the current state of district heating systems of the cities of Ukraine are presented. The interrelation between indicators of the current state and projects of energy efficient modernization of district heating systems is shown. Assessment of energy self-sufficiency of municipal district heating systems on condition of thermal modernization of buildings is carried out. The creation of energy management systems at the district heating enterprises is proposed. Bib. 6, Fig. 7, Tab. 5.

Otherness in More’s Utopia

Moreana ◽  
2016 ◽  
Vol 53 (Number 205- (3-4) ◽  
pp. 73-94
Author(s):  
Guillaume Navaud
Keyword(s):  
Foreign Policy ◽  
Major Part ◽  
Point Of View ◽  
Way Of Life ◽  
Old World ◽  
Self Sufficiency

Utopia as a concept points towards a world essentially alien to us. Utopia as a work describes this otherness and confronts us with a world whose strangeness might seem disturbing. Utopia and Europe differ in their relationship to what is other (Latin alienus) – that is, that which belongs to someone else, that which is foreign, that which is strange. These two worlds are at odds in regards to their foreign policy and way of life: Utopia aspires to self-sufficiency but remains open to whatever good may arrive from beyond its borders, while the Old World appears alienated by exteriority yet refuses to welcome any kind of otherness. This issue also plays a major part in the reception of More’s work. Book I invites the reader to distance himself from a European point of view in order to consider what is culturally strange not as logically absurd but merely as geographically remote. Utopia still makes room for some exoticism, but mostly in its paratexts, and this exoticism needs to be deciphered. All in all, Utopia may invite us to transcend the horizontal dialectics of worldly alterity in order to open our eyes to a more radical, metaphysical otherness.

PENGARUH SARANA BELAJAR DAN MOTIVASI BELAJAR TERHADAP KEMANDIRIAN BELAJAR MAHASISWA (Studi Empirical Pada Mahasiswa Beasiswa Bidikmisi UPBJJ-UT Ternate)

2018 ◽  
Vol 19 (2) ◽  
pp. 68
Author(s):  
Raden Sudarwo ◽  
Yusuf Yusuf ◽  
Anfas Anfas
Keyword(s):  
Student Learning ◽  
Significant Influence ◽  
Sense Of Self ◽  
Regression Equation ◽  
Learning Motivation ◽  
Coefficient Of Determination ◽  
Learning Tools ◽  
Constant Number ◽  
Self Sufficiency ◽  
Student Independence

This study aims to determine the influence of learning facilities and student learning motivation towards the independence of student learning. The result of the research shows that there is positive and significant influence of learning tool (X1) on learning independence (Y). It is obtained by tvalue (2,159) with p = 0,034 <0,05 and ttable at 5% significant level with df = 78 equal to 1,991. There is a positive and significant influence of learning motivation (X2) on learning independence (Y). It is obtained tvalue (7,858) with p = 0,000 <0,05 and ttable at 5% significant level with df = 78 equal to 1,991. There is a positive and significant influence of learning facilities (X1) and learning motivation (X2) simultaneously to the independence of learning (Y). This shows the coefficient of double correlation RY (1,2) = 0,746 and R² = 0,557 and price Fvalue equal to 48,980 with p = 0,000 <0,05 and Ftable = 3,11 at 5% significant level. Coefficient value X1 = 0,186 and X2 = 0,647, constant number equal to 8,650 so that can be made regression equation Y = 8,650 + 0,186X1 + 0,647X2. The higher the learning means (X1) and the learning motivation (X2), the higher the learning independence (Y). Coefficient of Determination is R² of 0,557. Means 55,7% learning independence is explained by learning tools and learning motivation. Meanwhile, 44,3% is explained by other factors not discussed in this study. The study concludes that partially, learning facilities and student learning motivation has a positive and significant effect on student independence (self-sufficiency) in learning.  In addition, both learning facility and motivation have a positive and significant effect on student learning independence or sense of self-sufficiency. Penelitian ini bertujuan untuk mengetahui pengaruh fasilitas belajar dan motivasi belajar siswa terhadap kemandirian belajar siswa. Hasil penelitian menunjukkan bahwa ada pengaruh yang positif dan signifikan sanara belajar (X1) terhadap kemandirian belajar (Y). Hal ini diperoleh dengan nilai thitung (2,159) dengan p = 0,034 <0,05 dan ttabel pada 5% tingkat signifikan dengan df = 78 sama dengan 1,991. Ada pengaruh positif dan signifikan motivasi belajar (X2) pada kemandirian belajar (Y). Diperoleh nilai thitung (7,858) dengan p = 0,000 <0,05 dan ttabel pada taraf signifikan 5% dengan df = 78 sebesar 1,991. Ada pengaruh yang positif dan signifikan dari fasilitas belajar (X1) dan motivasi belajar (X2) secara bersamaan terhadap kemandirian belajar (Y). Hal ini menunjukkan koefisien korelasi ganda RY (1,2) = 0,746 dan R² = 0,557 dan harga Fhitung sebesar 48,980 dengan p = 0,000 <0,05 dan Ftabel = 3,11 pada taraf signifikan 5%. Nilai koefisien X1 = 0,186 dan X2 = 0,647, bilangan konstan sebesar 8,650 sehingga dapat dibuat persamaan regresi Y = 8,650 + 0,186X1 + 0,647X2. Semakin tinggi nilai sarana belajar (X1) dan motivasi belajar (X2), semakin tinggi kemandirian belajar (Y). Koefisien Determinasi adalah R² 0,557. Berarti 55,7% kemandirian belajar dijelaskan oleh alat belajar dan motivasi belajar. Sementara itu, 44,3% dijelaskan oleh faktor-faktor lain yang tidak dibahas dalam penelitian ini. Penelitian ini menyimpulkan bahwa secara parsial, baik ketersediaan sarana prasaran belajar dan motivasi berpengaruh positif dan signifikan pada kemandirian mahasiswa, dari dari kedua variable tersebut motivasi mempunyai pengaruh lebih besar. Secara simultan ketersediaan sarana prasarana dalam belajar dan pembelajaran, serta motivasi berpengaruh positif terhadap kemandirian belajar.

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