نتایج جستجو برای: cultivated area of all irrigated crops decrease and rainfed crops rainfed wheat

تعداد نتایج: 24102885  

2000
C. J. Pilbeam J. Gaunt

Sustainable production requires balanced resource use and it is the management decisions at a household level that determine nutrient fluxes and the economic viability of enterprises. Traditionally, the agricultural systems of the mid-hills of Nepal have relied on the close integration of forestry, livestock husbandry and crop production but increasing population and other social changes are st...

2011
Murali Krishna Gumma Prasad S. Thenkabail Andrew Nelson

Mapping irrigated areas of a river basin is important in terms of assessing water use and food security. This paper describes an innovative remote sensing based vegetation phenological approach to map irrigated areas and then the differentiates the ground water irrigated areas from the surface water irrigated areas in the Krishna river basin (26,575,200 hectares) in India using MODIS 250 meter ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بیرجند - دانشکده علوم انسانی 1390

in solvo-hydrothermal method, xrd pattern was indicated presence of intermediate of ammonium octatmolybdate and ammonium tetramolybdate, which were changed to stble phase of ?-moo3 annealing. sem images were indicated nanoparticle with semispheical morphology and tem image was demonstrated nanoparticles with a diameter size of 25nm. also in impregnate method. the xrd pattern was shown high crys...

Journal: :بوم شناسی کشاورزی 0

introduction crop sequencing with a particular arrangement in a 2-3 or more yearly period is known as crop rotation. considering crop diversity and soil fertility crop rotation is essential because it prevents soil degradation which is a result of sequential cultivation of one crop causing nutrients imbalance, exudation of different compounds and antibiotics from crop roots. determining crops s...

2017
Yan Fang Yanlei Du Jun Wang Aijiao Wu Sheng Qiao Bingcheng Xu Suiqi Zhang Kadambot H. M. Siddique Yinglong Chen

To determine root growth and grain yield of winter wheat (Triticum aestivum L) under moderate drought stress, a nursery experiment and a field trial were conducted with or without water stress using three representative cultivars released in different years: CW134 (old landrace), CH58 (modern cultivar) and CH1 (new release). In the nursery experiment, plants were grown in soil-filled rhizoboxes...

ژورنال: علوم آب و خاک 2009
رستگار, فاطمه, صبوحی, محمود,

In the present study, grey fuzzy programming model was used for determination of cropping pattern in central part of Quchan city. The needed data was collected from Almachigh Research Center for the year 2008. Result showed that, current cultivated area of irrigated wheat, irrigated barley and alfalfa is more than and rain-fed barley is less than the represented interval upper and lower limits,...

Allelopathic effects of plant residues is an important research avenue regarding optimization of rotation systems in agronomy. The aim of this study was to investigate the allelopathic effects of four plant residues, namely, black cumin, dragonhead, dill, and soybean on the germination and growth of wheat (Triticum aestivum) in different cropping systems. Results showed that applicatio...

2013
V. VIJAYA GEETHA

1 Assistant Professor, Department of Seed Science and Technology, Krishi Vigyan Kendra, TNAU, Vriddhachalam, INDIA 2 Special Officer (Seeds), Seed Centre, TNAU, Coimbatore 641 003, INDIA __________________________________________________________________________________________ Abstract: The main goal of the study is rehabilitation and improving the productivity of land owned by tribals and othe...

Journal: :Canadian Journal of Soil Science 2021

Long-term cattle manure applications build up nutrient pools and can lead to trace element enrichments in soils. The objectives of this study were evaluate copper (Cu) zinc (Zn) loadings the soil during continuous annual determine time required for return its pre-manure available Cu Zn levels after is discontinued. application rates 0, 30, 60, 90 Mg·ha ?1 rainfed 120, 180 (wet weight) irrigated...

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