نتایج جستجو برای: cropping patterns

تعداد نتایج: 419929  

Journal: :Int. J. Applied Earth Observation and Geoinformation 2011
Dailiang Peng Alfredo R. Huete Jingfeng Huang Fuming Wang Huasheng Sun

In this paper, we developed a more sophisticated method for detection and estimation of mixed paddy rice agriculture from Moderate Resolution Imaging Spectroradiometer (MODIS) satellite data. Previous research demonstrated thatMODIS data can be used tomap paddy rice fields and to distinguish rice from other crops at large, continental scaleswith combined Enhanced Vegetation Index (EVI) and Land...

مهدی نصر اصفهانی, , احمد مرتضوی, ,

The black dot disease of potato is a fungal disease caused by Colletotrichum coccodes (syn. C. atramentarium) that produces accervuli on infected underground plant parts which appear as black dots. The disease appears at the flowering stage and develops up to the season end. The survey on black dot disease of potato in two successive years indicated that the infection percentage is 39.86 in Fer...

Journal: :پژوهش های زراعی ایران 0
علیرضا کوچکی مهدی نصیری محلاتی مرادی مرادی یاسر علی زاده

in order to evaluate the yield and nitrogen use efficiency of corn and cotton intercropping under different levels of nitrogen, an experiment was conducted as a factorial arrangement based on completely randomized block design with three replications. the experimental treatments were nitrogen fertilizers in four levels (0, 50, 100 and 150 kg ha-1) and planting pattern in three levels (maize sol...

2000
A. A. Adesina A. D. Ouattara

In the Savannah region of West Africa, the highly variable rainfall and poor soils have been shown to di€erentially a€ect the yield potential of various crops. The paper applies a simple risk programming model to assess the e€ects of price and yield risk on the incomes of smallholder farmers in northern region of Coà te d'Ivoire. The analysis showed that by considering price and yield risks, it...

Journal: :international journal of agricultural management and development 2014
seyed abolghasem mortazavi reza hezareh sina ahmadi kaliji samira shayan mehr

water resources sustainability is one of the major issues in the agricultural sustainability. in this study sustainability of water resources has been investigated by use of linear and non-linear models in six models based on optimal utilization of water resources in the north parts farms of iran because of incorrect use of agricultural water resources, from 2011 to 2012. also “gross margin per...

Journal: :Journal of Agricultural and Applied Economics 1994

Safar Nasrollahzadeh Sajjad Shaker-Koohi,

Intercropping is considered for increasing and stability of yield per unit. In order to study the effects of different intercropping arrangements on sorghum and mungbean yield and to find the land use advantage in the intercropping system, an experiment was carried out based on a randomized complete block design with seven treatments and three replications at the Research Farm, Faculty of Agric...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید