A simple soil moisture index to forecast cropyields
Neutron probe soil moisture measurements obtained biweekly during the growing season between 1982 and 1991 from multiple depths under grass-covered plots at 17 Illinois Climate Network sites are used to forecast cropyields. A Soil Moisture Index
the SMIX values and cropyields are evaluated at county, regional, and statewide scales.
The large area crop inventory experiment (LACIE). Methodology for area, yield and production estimation in Remote sensing application in agriculture and hydrology.
This study was carried out in the south-east of Ireland (Co. Wexford) over a four-year period (1984-1987) to determine the factors responsible for the variation in yield of spring barley obtained by growers whose farms were situated on the Clonroche
Soils Series. The results show that the level of management skills had a significant effect on yield variance in all four years.
The effects of gas flaring on crops in the Niger Delta, Nigeria
Agriculture ; Air temperature ; Cropyield ; Delta ; Fire ; Natural gas ; Niger ; Nigeria ; Oil exploration ; Pollution ; Soil temperature ; Spatial analysis ; Statistical analysis
This study explores the effects of gas flaring on commonly cultivated crops in the Niger Delta region of Nigeria. It attempts a spatial gradient analysis of crop growth and development near a gas flaring site at Eleme, Rivers state, Nigeria.
and productivity. Crop residue increased water infiltration and yields in the Cochabamba high valley. However, in Chuquisaca the effects of ground cover were small or negative. Seeders are discussed. - (SLD)
For small farmers in the Bolivian highlands, wheat crop production is limited by moisture stress and soil erosion. A. discusses research in two Bolivian departments, Chuquisaca and Cochabamba, conducted to increase water-use efficiency
Response of four andean crops to rotation and fertilization
Agricultural practice ; Agriculture ; Andes ; Crop rotation ; Ecuador ; Fertilizer ; Mountain ; Sustainable development ; Years 1990-99
Five-year study at the Santa Catalina experimental station of the National Institute for Agricultural Research, INIAP-Ecuador evaluates the effects of monocropping and crop rotation 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
Crop ; Cropyield ; Cropping ; Cultivated land;Cultivated surface ; Farm income ; Farming;Agriculture ; Fertilizer ; Nitrogen ; Optimization ; United States ; Water pollution
The analysis is directed at estimating the marginal value of a base acre, the nitrogen rate of fertilizer use, the corn yield, and the excess nitrogen rate under alternative policy options designed to encourage planting flexibility in response
Agricultural technique ; Agriculture ; Crop ; Cropyield ; Farming system ; Hill ; Laos ; Rice cultivation ; Slash and burn agriculture
Rice production in the Laotian hills have undergone reduction in length of fallow. Although shorter fallow periods resulted in excessive labor needs for weeding, they have had few visible effects on soil fertility and cropyields. - (DWG)
This paper, taking the Yangou Basin as a case study and using day-by-day meteorological data of Yan’an station in 2005, simulated and analyzed the quantitative relation between cropyield, soil and water loss and topographic condition with the aid
of WIN-YIELD software. Results and discussion about the influence of topographic gradient on cropyield, and on soil and water loss. It is showed that topographic gradients of 5° and 15° are two important thresholds.
Sensitivity of corn and soybean yield in Illinois to air temperature and precipitation : the potential impact of future climate change
variables to which corn and soybean yield is sensitive to predict cropyield under future climate. Given the regional GCM prediction for increased summer temperatures and summer drought, both corn and soybean yield will likely decrease under future climate
By identifying specific monthly climate variables (mean daily temperature and precipitation) to which corn and soybean yield is sensitive, this study compares monthly regional General Circulation Model (GCM) predictions with the monthly climate
Africa ; Agriculture ; Agronomy ; Climate fluctuation ; Cropyield ; Impact ; Monsoon ; Rainfall ; Sahel ; West Africa
of this study is to document the impact of these fluctuations on the yield of mil crop through sensitivity experiments of a crop model. - (BJ)
West African Sahel depends mainly on rain fed agriculture. Rainfall available for this agriculture is concentrated in a very short-time range leading to an extreme sensitivity of yield to monsoon fluctuations at different time-scales. The aim
Agriculture ; Cropyield ; Czech Republic ; Digital elevation model ; Model ; Slope evolution ; Topography
sources (combine yield monitor, RTK-GPS and data from airborne laser scanning). The models of topographical characteristics were compared with cropyields during the observed period of 2004–2012, in order to determine which data source is best
for the evaluation of the influence topography holds over yield values. Data from airborne laser scanning turned out to be the most suitable dataset for the tasks, because of their sufficient accuracy and frequency. - (EN)
Applications of manure and inorganic fertilizer together (integrated nutrient management) may allow sustained higher cropyields and greater economic benefits than does either applied alone. This concept is being tested in three of the major crop