نتایج جستجو برای: controlling crop losses

تعداد نتایج: 260548  

2017
Upendra M. Sainju

Nitrogen balance in agroecosystems provides a quantitative framework of N inputs and outputs and retention in the soil that examines the sustainability of agricultural productivity and soil and environmental quality. Nitrogen inputs include N additions from manures and fertilizers, atmospheric depositions including wet and dry depositions, irrigation water, and biological N fixation. Nitrogen o...

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2013
A. P. Wywialowski A. P. WYWIALOWSKI

The USDA, National Agricultural Statistics Service (NASS) surveyed 16,000 agricultural producers in January 1995. Of 10,144 respondents nationwide, 58% reported wildlife-caused losses of their commodities, an increase from 55% in 1989. Based on the median value of all producers' estimates of their losses, wildlife-caused losses cost producers approximately $591 million in 1994, $130 million mor...

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Journal: :Sustainability 2021

Ornamental plant production constitutes an important sector of the horticultural industry worldwide and fungal infections, that dramatically affect aesthetic quality plants, can cause serious economic crop losses. The need to reduce use pesticides for controlling outbreaks requires development new sustainable strategies pathogen control. In particular, early accurate large-scale detection occur...

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2002
Raghav Gaiha Katsushi Imai

This paper focuses on vulnerability of rural households to poverty when a negative crop shock occurs. Of particular concern is the possibility of some sections experiencing long spells of poverty as a consequence of such shocks. The analysis is based on the ICRISAT panel survey of households in a semi-arid region in south India during 1975-84. Using alternative specifications that take into acc...

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Journal: :Current opinion in biotechnology 2000
C M Rommens G M Kishore

Effective and sustained control of fungal pathogens and nematodes is an important issue for all agricultural systems. Global losses caused by pathogens are estimated to be 12% of the potential crop production [1], despite the continued release of new resistant cultivars and pesticides. Furthermore, fungi are continually becoming resistant to existing resistance genes and fungicides, and a few o...

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2011
Jestinos Mzezewa Leon D van Rensburg

Runoff constitutes one of the major water losses from agricultural fields in semi-arid areas. However, by adopting appropriate soil management practices, the runoff can be harnessed for improving crop yields. The main objective of this study was to quantify rainfall-runoff relationships under in-field rainwater harvesting (IRWH) using simulated rainfall, and to compare these results to those ob...

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2013
Carol Bishop

Is the crop economically feasible (profitable)? The most comprehensive way to determine if an alternative crop is economically feasible is to complete an enterprise budget. The enterprise budget is a projection of the manager’s estimates, and is a tool to estimate net profit by estimating revenues and subtracting operating and ownership costs associated with a particular crop. To create an ente...

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ژورنال: دانش بیماری شناسی گیاهی 2019
Hatamabadi farahani, maryam,

Hatamabadi-Farahani M. 2019. Root knot disease of pomegranate. Plant Pathology Science 8(1):38-49. DOI:10.2982/PPS.8.1.38.    Pomegranate is an important fruit crop which is attacked by several pests and pathogens. Diseases caused by nematodes are of economic importance. The root knot nematodes (Meloidogyne spp.) causing considerable yield losses in pomegranate.  Root knot nematodes are seden...

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2009
E. E. RICHARDSON

Field trials were used to investigate the phytotoxicity of foliar sprays of 2,4-D amine to sugarcane. Yield losses of variety NCo 376 resulted from band sprays when 3,3 kg ae/ha was sprayed onto plant or ratoon cane which had unfurled three or more leaves per shoot. The greater the foliar development of the crop at the time of spraying, the greater was the resulting crop loss. At similar stages...

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2017
Bernhard Schauberger Sotirios Archontoulis Almut Arneth Juraj Balkovic Philippe Ciais Delphine Deryng Joshua Elliott Christian Folberth Nikolay Khabarov Christoph Müller Thomas A M Pugh Susanne Rolinski Sibyll Schaphoff Erwin Schmid Xuhui Wang Wolfram Schlenker Katja Frieler

High temperatures are detrimental to crop yields and could lead to global warming-driven reductions in agricultural productivity. To assess future threats, the majority of studies used process-based crop models, but their ability to represent effects of high temperature has been questioned. Here we show that an ensemble of nine crop models reproduces the observed average temperature responses o...

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نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید

function paginate(evt) { url=/search_year_filter/ var term=document.getElementById("search_meta_data").dataset.term pg=parseInt(evt.target.text) var data={ "year":filter_year, "term":term, "pgn":pg } filtered_res=post_and_fetch(data,url) window.scrollTo(0,0); } function update_search_meta(search_meta) { meta_place=document.getElementById("search_meta_data") term=search_meta.term active_pgn=search_meta.pgn num_res=search_meta.num_res num_pages=search_meta.num_pages year=search_meta.year meta_place.dataset.term=term meta_place.dataset.page=active_pgn meta_place.dataset.num_res=num_res meta_place.dataset.num_pages=num_pages meta_place.dataset.year=year document.getElementById("num_result_place").innerHTML=num_res if (year !== "unfilter"){ document.getElementById("year_filter_label").style="display:inline;" document.getElementById("year_filter_place").innerHTML=year }else { document.getElementById("year_filter_label").style="display:none;" document.getElementById("year_filter_place").innerHTML="" } } function update_pagination() { search_meta_place=document.getElementById('search_meta_data') num_pages=search_meta_place.dataset.num_pages; active_pgn=parseInt(search_meta_place.dataset.page); document.getElementById("pgn-ul").innerHTML=""; pgn_html=""; for (i = 1; i <= num_pages; i++){ if (i===active_pgn){ actv="active" }else {actv=""} pgn_li="
  • " +i+ "
    • "; pgn_html+=pgn_li; } document.getElementById("pgn-ul").innerHTML=pgn_html var pgn_links = document.querySelectorAll('.mypgn'); pgn_links.forEach(function(pgn_link) { pgn_link.addEventListener('click', paginate) }) } function post_and_fetch(data,url) { showLoading() xhr = new XMLHttpRequest(); xhr.open('POST', url, true); xhr.setRequestHeader('Content-Type', 'application/json; charset=UTF-8'); xhr.onreadystatechange = function() { if (xhr.readyState === 4 && xhr.status === 200) { var resp = xhr.responseText; resp_json=JSON.parse(resp) resp_place = document.getElementById("search_result_div") resp_place.innerHTML = resp_json['results'] search_meta = resp_json['meta'] update_search_meta(search_meta) update_pagination() hideLoading() } }; xhr.send(JSON.stringify(data)); } function unfilter() { url=/search_year_filter/ var term=document.getElementById("search_meta_data").dataset.term var data={ "year":"unfilter", "term":term, "pgn":1 } filtered_res=post_and_fetch(data,url) } function deactivate_all_bars(){ var yrchart = document.querySelectorAll('.ct-bar'); yrchart.forEach(function(bar) { bar.dataset.active = false bar.style = "stroke:#71a3c5;" }) } year_chart.on("created", function() { var yrchart = document.querySelectorAll('.ct-bar'); yrchart.forEach(function(check) { check.addEventListener('click', checkIndex); }) }); function checkIndex(event) { var yrchart = document.querySelectorAll('.ct-bar'); var year_bar = event.target if (year_bar.dataset.active == "true") { unfilter_res = unfilter() year_bar.dataset.active = false year_bar.style = "stroke:#1d2b3699;" } else { deactivate_all_bars() year_bar.dataset.active = true year_bar.style = "stroke:#e56f6f;" filter_year = chart_data['labels'][Array.from(yrchart).indexOf(year_bar)] url=/search_year_filter/ var term=document.getElementById("search_meta_data").dataset.term var data={ "year":filter_year, "term":term, "pgn":1 } filtered_res=post_and_fetch(data,url) } } function showLoading() { document.getElementById("loading").style.display = "block"; setTimeout(hideLoading, 10000); // 10 seconds } function hideLoading() { document.getElementById("loading").style.display = "none"; } -->