نتایج جستجو برای: crop factor

تعداد نتایج: 908373  

2001
C. S. T. Daughtry E. R. Hunt C. L. Walthall T. J. Gish Shunlin Liang E. J. Kramer

Quantifying crop residue cover on the soil surface is important for improving estimates of surface energy balance, net primary productivity, nutrient cycling, and carbon sequestration. Quantifying crop residue cover is also an important factor in controlling soil erosion and evaluating the effectiveness of conservation tillage practices. By reducing the movement of eroded soil into streams and ...

ژورنال: علوم آب و خاک 2005
علی زمردیان, , حمید قاسم خانی, , داریوش زارع, ,

The application of solar energy for drying cereals and other agricultural commodities has been increasing lately. This is due to the fact that solar energy is free, renewable, inexhaustible and environmentally friendly. This research is a new approach for employing solar energy as the main energy source for drying purposes. The drying test rig was designed, fabricated and evaluated. The grain s...

2011
Sergey Medvedev Alexander Topaj

Typical use cases of the crop simulation models consist of such operations as parametric identification, yield forecast and optimization, analysis of different technologies etc. All these tasks relate to multiple running of the model with several variants of input parameters and can be automated by means of polyvariant crop simulation framework which allows performing the multiple running in th...

Fadaei Tehrani, Ali Akbar, Hassani, Marzieh, Tadayon, Mahmoud Reza,

The aim of this study was to investigate the effect of chemical fertilizers of nitrogen, phosphorus, sulfur and biofertilizer on some growth indicators of Camelina sativa L. experimental plant during the crop year 2016 in a farm located in Kazerun and as a factorial in the form of complete randomized block design with three replications. Treatments include fertile biofertilizer 2 containing pho...

2011
Rohitashw Kumar Vijay Shankar Mahesh Kumar

Efficient irrigation water management requires a good quantification of evapotranspiration. The precise estimation of water requirement of crop is very important factor in the application of irrigation design and scheduling. Water relation model are essential component of all crop model because of critical role of water status has in determining growth, productivity and produce quality. Irrigat...

Journal: :Eos, Transactions American Geophysical Union 2014

Journal: :Indian Journal Of Agricultural Research 2016

2014
Afroz Alam Aqeel Hasan Rizvi Khushbu Verma Chhaya Gautam

Farming is an important and key factor for the economy of developing countries. Since last several years, farmers once again welcomed many traditional farming systems to get crop yield for completion of food requirement. Although, traditional techniques are not much sufficient in new agriculture world because farming is getting new challenges from biotic and abiotic factors. New techniques and ...

Journal: :International journal of biometeorology 2011
Mohammad Bannayan Sajad Sadeghi Lotfabadi Sarah Sanjani Azadeh Mohamadian Majid Aghaalikhani

Climate variability adversely impacts crop production and imposes a major constraint on farming planning, mostly under rainfed conditions, across the world. Considering the recent advances in climate science, many studies are trying to provide a reliable basis for climate, and subsequently agricultural production, forecasts. The El Niño-Southern Oscillation phenomenon (ENSO) is one of the princ...

2015
Maryann T. Frazier Chris A. Mullin Jim L. Frazier Sara A. Ashcraft Tim W. Leslie Eric C. Mussen Frank A. Drummond

Beekeepers who use honey bees (Apis mellifera L.) for crop pollination services, or have colonies making honey on or in close proximity to agricultural crops, are concerned about the reductions of colony foragers and ultimate weakening of their colonies. Pesticide exposure is a potential factor in the loss of foragers. During 2009-2010, we assessed changes in the field force populations of 9-10...

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