Response of four andean crops to rotation and fertilization
Agricultural practice ; Agriculture ; Andes ; Croprotation ; Ecuador ; Fertilizer ; Mountain ; Sustainable development ; Years 1990-99
Agriculture ; Andes ; Années 1990 ; Développement durable ; Engrais ; Equateur ; Montagne ; Pratique culturale ; Rotation culturale
Five-year study at the Santa Catalina experimental station of the National Institute for Agricultural Research, INIAP-Ecuador evaluates the effects of monocropping and croprotation on yield, above-ground biomass, and weeds associated with four
andean crops planted with and without fertilizer. Best sequences for yield and biomass production were lupine (NF)-quinoa, lupine (NF)-melloco, potato (F)-quinoa (NF), melloco-quinoa, and lupine (NF)-potato. weeds were not affected by previous crop
Applications of manure and inorganic fertilizer together (integrated nutrient management) may allow sustained higher crop yields and greater economic benefits than does either applied alone. This concept is being tested in three of the major crop
rotations in the mid-hills region of Nepal - rice-wheat on irrigated khet land, millet-maize on rain-fed bari land, and upland rice-blackgram on ancient river terraces known as tar land. Using a partial cost-benefit analysis, authors find that applications
Contribution of cropping systems program research and extension to the rural poor : a case study of Ratnanagar cropping systems site.
Agriculture ; Céréale ; Géographie de l'Asie ; Népal ; Rendement agricole ; Rotation culturale ; Stratégie de développement ; Technique agricole ; Terai
Pratiques d'agriculture à plusieurs récoltes par an dans le Terai népalais : rotation traditionnelle| impact des programmes d'augmentation de la production céréalière sur les pratiques des paysans les plus pauvres, souvent peu bénéficiaires des
Agriculture ; Aptitude culturale ; Chitawan ; Fertilité du sol ; Géographie de l'Asie ; Himalaya ; Montagne ; Népal ; Productivité agricole ; Préférence ; Rotation culturale ; Sol ; Système de culture ; Utilisation du sol
Eight croprotation options, derived from 100 field interviews and 70 soil analyses in Chitawan district of Narayani zone (Nepal), were evaluated in terms of crop preferences, productivity, profitability, resource requirements, soil quality
Effects of croprotation and rainfall on water erosion on a gentle slope in the hilly loess area, China
Agropedology ; China ; Croprotation ; Erosion control ; Gansu ; Precipitation ; Semi-arid area ; Slope gradient ; Soil erosion ; Water erosion
Agropédologie ; Chine ; Dingxi ; Domaine semi-aride ; Erosion des sols ; Erosion hydrique ; Gansu ; Lutte contre l'érosion ; Pente de versant ; Précipitation ; Rotation culturale
In this study, 21 plots including 7 crop-rotation types (CRTs) under 3 different slight gradients (10°, 15°, 20°), were established in Dingxi, a typical semiarid hilly loess area in China. Eight consecutive years of erosion data under different
treatments were implemented. It is highlighted that : Potato cultivation results in higher erosion rates than other crops on sloping land; Potato farming using additional measures should be conducted on terraces; Crop-shrub intercropping and farmland
Rotation des cultures fourragères sur les sables pour lutter contre la déflation
Arid land ; Asian part of USSR ; Desert ; Farming system ; Karakum ; Primary production ; Quantitative ecology ; Rotationcropping ; Sand ; Turkmenistan ; Wind erosion deflation
De 1986 à 1990 on a étudié la productivité de deux rotations de cultures fourragères (sorgho, luzerne, tournesol...). Technique utilisée pour la fixation des sables au Karakum central. - (MMB)
Agricultural land use ; Agricultural practice ; Agriculture ; Conflict ; Croprotation ; Land use ; Population pressure ; Rural landscape ; Shifting cultivation ; Third World ; Tropical rain forest ; Wasteland ; Wilderness
Agriculture ; Conflit ; Culture itinérante ; Forêt tropicale ; Friche ; Nature sauvage ; Paysage rural ; Pratique culturale ; Pression démographique ; Rotation culturale ; Tiers-Monde ; Utilisation agricole du sol ; Utilisation du sol
théories relatives à ce type de culture qui prennent en compte la théorie de la production des ménages et le concept de rotation optimale. Le modèle explique le fait que les agents utilisent des âges de rotation multiples.
Climate change impacts on soil erosion in Midwest United States with changes in crop management
In this study, changes in management were assigned based on previous studies of crop yield, optimal planting date, and most profitable rotations under climate change in the Midwestern United States. The soil erosion model appeared to underestimate
the impact of change in crop type, particularly to soybeans. This research shows that future crop management changes due to climate and economics can affect the magnitude of erosional impacts beyond that which would be predicted from direct climate change
Agricultural technique ; Angola ; Croprotation ; Erosion budget ; Erosion control ; Farming system ; Ferralsol ; Land development ; Slope ; Soil erosion ; Tropical zone ; Water erosion
Angola ; Bilan d'érosion ; Erosion des sols ; Erosion hydrique ; Lutte contre l'érosion ; Mise en valeur ; Rotation culturale ; Sol ferrallitique ; Système de culture ; Technique agricole ; Versant ; Zone intertropicale
Agriculture suburbaine ; Géographie de l'Asie ; Horticulture ; Japon ; Kanto ; Légumes ; Rotation culturale ; Système de culture
The A. clarifies the development processes of vegetable cultivation and its rotation systems with grain and root crops. Now Miura Peninsula is one of the most productive agricultural regions in the Tokyo metropolitan area. - (SGA)
Agriculture ; Belgique ; Energie ; Environnement ; Pratique culturale ; Protection de la nature ; Rotation culturale ; Wallonie
Guide subdivisé en 6 chapitres : 1. Le sol; 2. La fertilisation; 3. Occupation du sol : rotation des cultures, les légumineuses, les engrais verts, les résidus de culture, prairies; 4. Protection des cultures : une nécessité vitale, la lutte
characteristics of agriculture, such as land and/or croprotation systems and agricultural implements, are used as basic criteria, representing however only one side of agriculture. The divisive approach dominates and no quantitative bases are offered
A palaeomagnetic study is reported from the lavas of Eocene, Miocene and Pliocene age cropping out immediately to the north of the North Anatolian Fault Zone (NAFZ) in the Reşadiye–Mesudiye region of central-eastern Anatolia. Rock magnetic
block rotation in this region since Upper Cretaceous times. This study indicates that this was overtaken by clockwise rotation in Eocene times. Results from later Miocene and Pliocene volcanic rocks indicate that no significant tectonic rotation has
occurred in the north of the NAFZ in Neogene times. This contrasts with rotations in the weaker crust comprising the Anatolian collage south of the NAFZ, where differential and sometimes large anticlockwise rotations occurred during the latter part
Agricultural land use ; Agriculture ; Asian part of Russia ; Crop yield ; European part of Russia ; Food crop ; Industrial cropping ; Russia ; Twentieth Century
pâturages naturels. Description de combinaisons des principaux groupes de cultures dans différents types de rotations des cultures, ainsi que du ratio entre cultures pour l' alimentation, cultures à usage technique et de fourrage pour différents
The effects of past variations of the Earth's rotation rate on climate
Géographie physique ; Paléoclimatologie ; Précambrien ; Rotation de la Terre
Palaeological evidence indicates that the rotation rate of the Earth during the late Precambrian was 2-2.5 times faster than now. Typically high rotation rate in a fluid system reduces the characteristic size of dynamic features, their associated
transport processes and the overall intensity of the motions. The climatic consequences of the high rotation rate during the Precambrian are outlined. In particular, it is hypothesised that variations in the rotation rate imposed an important, and possibly
dominant, effect on the genesis and termination of the Precambrian ice age. Other possible implications of the high rotation rate to oceanography, life forms and geology are briefly noted.