Four Endemic Andean Tuber Crops: Promising Food Resources for Agricultural Diversification

1987 ◽  
Vol 7 (1) ◽  
pp. 43 ◽  
Author(s):  
Steven R. King
Keyword(s):  
Food Resources ◽  
Agricultural Diversification ◽  
Andean Tuber Crops ◽  
Tuber Crops

Metagenomic survey of the bacterial communities in the rhizosphere of three Andean tuber crops

Symbiosis ◽  
2019 ◽  
Vol 79 (2) ◽  
pp. 141-150 ◽  
Author(s):  
Eduardo Chica ◽  
Lenys Buela ◽  
Adrián Valdez ◽  
Paulina Villena ◽  
Denisse Peña ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Andean Tuber Crops ◽  
Tuber Crops

scholarly journals Cultivation of minor tuber crops in Peru and Bolivia

1988 ◽  
Vol 60 (2) ◽  
pp. 87-92
Author(s):  
Leena Pietilä ◽  
Paula Jokela
Keyword(s):  
Climatic Variation ◽  
Mountainous Area ◽  
Chemical Fertilizers ◽  
Oxalis Tuberosa ◽  
The Andes ◽  
Animal Dung ◽  
Ullucus Tuberosus ◽  
Andean Tuber Crops ◽  
Full Utilization ◽  
Tuber Crops

A collection mission of three Andean tuber crops, oca (Oxalis tuberosa, Oxalidaceae), ulluco (Ullucus tuberosus, Basellaceae) and añu (Tropaeolum tuberosum, Tropaeolaceae), was carried out in southern Peru, Bolivia and northern Argentina. This article deals with the observations made during this mission. 55 ulluco fields were visited. In general, the fields are small, 240m2 on average, and they are mostly situated on mountain slopes. The fields are fertilized with animal dung; chemical fertilizers are quite rare. In the fields, people work with hoes ang ploughs as they did hundreds of years ago. Mechanization of agriculture would prevent full utilization of the mountainous area of the Andes. Ulluco is usually interplanted with other crops, usually, many forms of ulluco in one field. Because of crop rotation description of the fields is partly valid for the cultivation of other crops, too. Due to drastic climatic variation, cultivation of mixed varieties maybe the best way to guarantee some yield. When results of the investigations are wished to benefit developing countries, knowledge of social, agricultural and environmental factors is of great value.

Feeding strategy of wild herbivores in habitats of limited food resources

2011 ◽  
Vol 7 (1) ◽  
Author(s):  
Jiří Kamler
Keyword(s):  
Feeding Strategy ◽  
Food Resources ◽  
Limited Food

Brown Bear (Ursus arctos) Habitat Use and Food Resources on Elmendorf Air Force Base, Alaska

2007 ◽  
Author(s):  
Sean D. Farley ◽  
Herman Griese ◽  
Rick Sinnott ◽  
Jessica Coltrane ◽  
Chris Garner ◽  
...  
Keyword(s):  
Habitat Use ◽  
Air Force ◽  
Ursus Arctos ◽  
Brown Bear ◽  
Food Resources ◽  
Air Force Base

Agrarian Change and Structural Transformation: Drivers and Distributional Outcomes

2018 ◽  
Author(s):  
Agnes Andersson Djurfeldt ◽  
Göran Djurfeldt ◽  
Ola Hall ◽  
Maria Archila Bustos
Keyword(s):  
Structural Transformation ◽  
Domestic Demand ◽  
Agrarian Change ◽  
Institutional Changes ◽  
Crop Diversification ◽  
Market Participation ◽  
Farm Diversification ◽  
Agricultural Diversification ◽  
Multi Level ◽  
Gender Profile

This chapter examines agrarian changes triggered by the structural transformation of the overall economy, focusing on their drivers and distributional outcomes. By means of multi-level modelling of three processes—intensification of grain yields, diversification of cropping, and non-farm diversification (pluriactivity)—it concludes that intensification has moderately accelerated and is getting more important than its twin process. Similarly, crop diversification has accelerated, while non-farm diversification seems to be more pull- than push-driven. The most important drivers of the two first-mentioned processes are commercial ones: increasing local and domestic demand for grains and for other crops and institutional changes promoting market participation of smallholders. The chapter concludes that these processes are not pro-poor, but neither are they pro-rich; middling smallholder households tend to be more involved. The gender profile of agricultural diversification seems to involve and benefit male-managed farms, whereas non-farm diversification is gender neutral.

scholarly journals An exploration of the relationship between recruitment communication and foraging in stingless bees

2021 ◽  
Author(s):  
Robbie I’Anson Price ◽  
Francisca Segers ◽  
Amelia Berger ◽  
Fabio S Nascimento ◽  
Christoph Grüter
Keyword(s):  
Stingless Bees ◽  
Sugar Content ◽  
Social Information ◽  
Food Resources ◽  
Food Sources ◽  
Foraging Strategies ◽  
High Quality ◽  
Recruitment Communication ◽  
Eusocial Bees ◽  
The Relationship

Abstract Social information is widely used in the animal kingdom and can be highly adaptive. In social insects, foragers can use social information to find food, avoid danger or choose a new nest site. Copying others allows individuals to obtain information without having to sample the environment. When foragers communicate information they will often only advertise high quality food sources, thereby filtering out less adaptive information. Stingless bees, a large pantropical group of highly eusocial bees, face intense inter- and intra-specific competition for limited resources, yet display disparate foraging strategies. Within the same environment there are species that communicate the location of food resources to nest-mates and species that do not. Our current understanding of why some species communicate foraging sites while others do not is limited. Studying freely foraging colonies of several co-existing stingless bee species in Brazil, we investigated if recruitment to specific food locations is linked to (1) the sugar content of forage, (2) the duration of foraging trips and (3) the variation in activity of a colony from one day to another and the variation in activity in a species over a day. We found that, contrary to our expectations, species with recruitment communication did not return with higher quality forage than species that do not recruit nestmates. Furthermore, foragers from recruiting species did not have shorter foraging trip durations than those from weakly-recruiting species. Given the intense inter- and intraspecific competition for resources in these environments, it may be that recruiting species favour food resources that can be monopolised by the colony rather than food sources that offer high-quality rewards.

Water-soluble non-starch polysaccharides of root and tuber crops: extraction, characteristics, properties, bioactivities, and applications

2020 ◽  
pp. 1-33
Author(s):  
Mylene Anwar ◽  
Edward John Birch ◽  
Yu Ding ◽  
Alaa El-Din Bekhit
Keyword(s):  
Water Soluble ◽  
Tuber Crops

scholarly journals Patterns of Agricultural Diversification in China and Its Policy Implications for Agricultural Modernization

2021 ◽  
Vol 18 (9) ◽  
pp. 4978
Author(s):  
Hongyun Han ◽  
Hui Lin
Keyword(s):  
Evolutionary Process ◽  
Policy Implications ◽  
Chinese Government ◽  
Agricultural Modernization ◽  
Agricultural Diversification ◽  
Leading Position ◽  
Chinese Agriculture ◽  
Reform And Opening Up ◽  
Central South ◽  
Opening Up

Based on the value of agricultural farm products produced by different subsectors in China, the foregoing analysis reveals the dynamic character of agricultural diversification by which, this study seeks to examine the evolutionary process of Chinese agriculture through a quantitative study of agricultural diversification at both national and provincial levels. In the initial stages of reform and opening up, the degree of agricultural diversification in the southwest was relatively high; then the center of agricultural diversification gradually moved to the southeast of China; finally, the degree of agricultural diversification in the economically developed eastern provinces was obviously higher than those in other regions in 2019. It was seen that some provinces in the eastern and central south regions moved toward increasing diversification in one direction, and other provinces changed direction, first moving toward diversification and later toward concentration or vice versa. These oscillations implied that there was a cyclic tendency of agricultural diversification along with an increase in per capita GDP. Generally speaking, the patterns of diversification differed across regions due to diversified agricultural subsectors resulting from different natural and socio-economic circumstances. In particular, in less developed regions with lower agricultural diversification levels, farming agriculture persistently dominated the leading position with relatively more resistance to modernizing trends in other aspects of agriculture. It is urgent for the Chinese government to figure out ways off reconciling agricultural productivity with environmental quality through the ecological intensification of agriculture.

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