نتایج جستجو برای: crop yield

تعداد نتایج: 245617  

2014
Ignasi Bartomeus Simon G. Potts Ingolf Steffan-Dewenter Bernard E. Vaissière Michal Woyciechowski Kristin M. Krewenka Thomas Tscheulin Stuart P.M. Roberts Hajnalka Szentgyörgyi Catrin Westphal Riccardo Bommarco

Background. Up to 75% of crop species benefit at least to some degree from animal pollination for fruit or seed set and yield. However, basic information on the level of pollinator dependence and pollinator contribution to yield is lacking for many crops. Even less is known about how insect pollination affects crop quality. Given that habitat loss and agricultural intensification are known to d...

Abstract Introduction Characterization of physical and chemical soil criteria is a key step in understanding the source of spatial variability in the productivity across agricultural fields (21). Crop yield variability can be caused by many factors, including spatial variability of soil texture, crop management, soil physical and chemical properties and nutrient availability (45). Understandin...

One of the main problems in crop production in Iran is the difference between actual yield and attainable yield which is called yield gap. Thus, identifying yield constraints and yield gap are important. Therefore, a study was conducted in 60 farms in Parsabad Moghan, during 2013-14 and 2014-15 crop years using Comparative Performance Analysis (CPA). In this study, several attributes related to...

1990
G. Genovese

In the context of the GEOLAND EC FP6 project the comparison of different remote sensing based approaches for yield forecasting over large areas in Europe are tested and results inter-compared. In particular the methods tested include the ones in use within the MARS-Crop Yield Forecasting System as the results from the Crop Growth Monitoring System model and vegetation indicators derived from Lo...

2005
Sakiko Hirose Hiroyuki Kawahigashi

Pesticides have played very important roles against food shortages and plant diseases, and our modern life would be vastly different without their use. Weed infestation adversely affects crop production by reducing yields and decreasing market prices of the crop. For cost-effective land use, crop yield and price must be maximized, and the cost of weed control minimized. Herbicides substantially...

2011
SALEEM SHAIK

This paper has two-fold contribution. First, normality of the crop yield residuals are examined using panel statistical procedures accounting for trend, autocorrelation and heteroskedasticity. Second, to evaluate the importance of accounting for spatial and temporal variation on the normality of crop yield residuals, the changes in the skewness, kurtosis and D’Agostino-Pearson 2 (K ) omnibus no...

2013
E. Playán J. Cavero A. Martínez-Cob J. M. Faci

In this work, applications of the coupled solid set sprinkler irrigation and crop model AdorSim introduced in the companion paper are presented. The sprinkler irrigation model is based on ballistic theory, while the crop model is based on CropWat. AdorSim was used to evaluate the effect of sprinkler spacing on seasonal irrigation water use (WU) and crop yield. The most relevant results were rel...

2014
Murad Ali Khan Mohammad Akmal

Yield of some crops performs better in the intercropping than sole cropping system. Sunflower (Helianthus annuus L.) canopy is fragile providing a lot of ground cover, hence, therefore, has a great potential to intercrop with a short stature and/or duration crop making it comparable for the better net return in a cropping system. Field experiment was, therefore, expressly conducted to study the...

Journal: :Agriculture and Food Sciences Research 2020

2015

Abstract—In this paper, effect of marginal quality groundwater on yield of cotton crop and soil salinity was studied. In this connection, three irrigation treatments each with four replications were applied. These treatments were i) use of canal water (T1), ii) use of marginal quality groundwater from tubewell (T2), and iii) conjunctive use by mixing with the ratio of 1:1 of canal water and mar...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید