Spatial monitoring of the sowing date plays an important role in crop yield estimation at the regional scale. The feasibility of using polarimetric synthetic aperture radar (SAR) data for early season monitoring of the sowing dates of oilseed rape (Brassica napus L.) fields is explored in this paper. Polarimetric SAR responses of six parameters, relying on polarization decomposition methods, we...

Potato crop is the fourth main food crops in the world after maize, rice and wheat. It is characterized by specific temperature requirements and develops best at about 20 ̊C. Forecasts of global warming prompt us to study the tolerance of potato genotypes to heat during the growing season. The aim of this work was to assess the response of chosen potato cultivars to high temperature during the d...

Crop farming in Sub-Saharan Africa is constantly confronted by extreme weather events. Researchers have been striving to develop different tools that can be used reduce the impacts of adverse on agriculture. Index-based crop insurance (IBCI) has emerged one could potentially hedge farmers against weather-related risks. However, IBCI still constrained poor product design and basis risk. This stu...

in order to determine the critical period of weed control and investigation the effect of periodical control and interference of weeds natural population on yield and yield components of winter canola (brassica napus l. cv. okapi) in west region of tehran an experiment was carried out at research field of tarbiat modarres university, tehran, iran on 2004-5 growing season. fourteen experimental ...

The aim of this study was to investigate the climate change impacts on some factors affecting rainfed wheat growth such as effective rainfall, planting date and length of growing season in four stations located in Chaharmahal and Bakhtiari province. Firstly, it is necessary to predict future (2046-2065) climatic conditions. For this purpose, the output of HADCM3 general circulation model was us...

Maize growth in narrow rows provides a more uniform spatial arrangement, but it does not always lead to increasing yield. A four-year study was conducted investigate the effect of row spacing on silage maize and yield during growing season at harvest time. field experiment with conventional (0.70 m) (0.35 plant density 92,000 plants ha−1 evaluated years 2011–2014, interaction × (92,000 110,000 ...

in order to evaluation the effect of planting date on development stages and some characteristics of spring safflower varieties, an experiment was conducted as split plot based on randomized complete block design with six replications at the kabotar abbad research station, isfahan during two growing seasons of 2006-2007 and 2007-2008. three safflower varieties such as arak, sofea and goldasht c...