Effect of fire on soil, rice, weeds and forest regrowth in a rain forest zone (Côte d'Ivoire)
Forest, soil, rice, weeds and regrowth were studied in the fields off local farmers in permanent plots during 2-5 years. The fields covered all currently cultivated soil types and forest types. This study is concerned with the full shifting
abandonment, soil erosion under rain fed cereals, soil erosion in vineyards,soil erosion in rain fed fruit-tree orchards, erosion and other problems derived from irrigation (piping development and salinization). The trend towards larger fields and farms
in both dry farming and irrigated systems has resulted in a relaxation of soil conservation practices.
Adaptation ; Agroclimatology ; Biomass ; Carbon dioxide ; China ; Climatic change ; Climatic warming ; Forecast ; Irrigated farming ; Model ; North-Eastern China ; Northern China ; Probability ; Scenario ; Southwest China ; Wheat
mechanism model in the probabilistic forecasting method. The results show that the CO2 fertilization effect can compensate reduction of wheat biomass with warming temperature in a strong compensating effect. Under the CO2 fertilization effect, the rain-fed
and irrigated wheat biomasses increase respectively, and the increment of biomass goes up with temperature rising. The rain-fed wheat biomass increase is greater than the irrigated wheat biomass. Without consideration of CO2 fertilization effect, both irrigated
and rain-fed wheat biomasses reduce, and there is a higher probability for the irrigated wheat biomass than that of the rain-fed wheat biomass.
A method for estimating the interaction depth of surface soil with simulated rain
the physical properties of the soil, rain intensities (RIs), slope gradients, initial water contents, and soil amendment. The effects of these factors on the EDT were quantified with simulated rain. Slope gradient accelerated the velocity of water flow
[b2] State Key Lab. of Soil Erosion and Dryland Farming on the Loess Plateau, Inst. of Soil and Water Conservation, Northwest AandF Univ., Yangling, Chine
Agricultural area of a parish ; Agricultural intensification ; Agricultural revolution ; Agriculture ; Farm income ; Farming system ; India ; Production cost ; Rainfarming ; Semi-arid area ; Sustainable development
Ethnic community ; International migration ; Land ; Marginality ; Migratory flow ; Poverty ; Rainfarming ; Refugees ; Rural change ; Rural economy ; Social change ; Societal relations ; State control ; Sudan ; Transfer of population
Summer weekly rainfall data collected by approximately 120 untrained volunteers (mainly farmers) using unofficial gauges in McLean County, reveal unambiguous mesoscale patterns. All volunteers used the same clear plastic, funnel shaped gauge
that could measure up to 140 mm of rain. The large number of sites precludes random observer bias as a factor. This analysis illustrates that climatologists can safely utilize volunteers observers for research.
Aborigines ; Amazonas ; Amerindians ; Brazil ; Cultural geography ; Frontier region ; Peasantry ; Peru ; Settlement ; South America ; Subsistence agriculture;Subsistence farming ; Traditional agriculture ; Tropical rain forest ; Village
The area of the tropical forests has been shrinking fast in the last decades and, moreover, considerable parts of the remaining natural forests are in a process of degradation, mainly due to overexploitation, intensified pasture farming and frequent
The aim of this research was to study the factors that influence the generation of runoff in small plots under natural rainfall conditions. Factors studied were crust permeability, roughness, soil salt content and time gaps between the rain showers
. The field trial was carried out in the Mashash experimental runoff farm in Israel's Negev desert. Runoff was measured on 8 plots using a tipping-bucket system. Results and discussion.
This study examines meteorological data and farmer's perception of rainfall in the Central Highlands of Kenya. Rainfall data from 5 meteorological stations during the period from 1947 to 1996 were analysed on an annual and a monthly basis. Analysing
annual precipitation and rain periods gave no clear trends over the study period. Results from analysing the growing seasons for maize, the main annual crop, and periods during which maize plants are sensitive to drought showed decreasing trends
in rainfall amounts for the study period. The farmers think rainfall has decreased over the last 40 years.