Pesquisa Agropecuária Brasileira, 2010 O objetivo deste trabalho foi testar a aplicação de medidas de acurácia para determinar a utilidade de diagnósticos nutricionais para comparação de fórmulas DRIS, e avaliar o emprego dessas medidas no processo de modelagem das funções do Sistema ...
Paulo Guilherme Salvador Wadt +1 more
doaj +1 more source
FOLIAR DIAGNOSIS: PRINCIPLES AND PRACTICE [PDF]
Plant Physiology, 1937 As a result of the broader view now taken with respect to the problems of soil fertility it is recognized that the conditions required for maximum growth must be sought from the facts of plant physiology as well as from those of soil science. For satisfactory growth a particular soil must satisfy certain conditions with respect to temperature, and to ...
openaire +2 more sources
Sugar Cane Cake and Mineral Fertilizers on Coconut (Cocos nucifera Linn.) Seedlings
CORD, 2009 High quantities of mineral fertilizers (MF) are required for good coconut seedling production, whose up dated recommendation is 232 grams per seedling.
Luiz Gonzaga Bione Ferraz +4 more
doaj +1 more source
Modelagem de funções no cálculo dos índices DRIS Modelling of functions in calculating DRIS indices
Pesquisa Agropecuária Brasileira, 2007 O objetivo deste trabalho foi modelar o fator k e as funções DRIS para a diagnose foliar de mangueiras cultivadas. Dez pomares comerciais, no estágio de produção, localizados no vale do Rio São Francisco, foram monitorados, mensalmente, durante dois anos,
Paulo Guilherme Salvador Wadt +5 more
doaj +1 more source
Glyphosate inhibition of ferric reductase activity in iron deficient sunflower roots [PDF]
, 2007 Iron (Fe) deficiency is increasingly being observed in cropping systems with frequent glyphosate applications. A likely reason for this is that glyphosate interferes with root uptake of Fe by inhibiting ferric reductase in roots required for Fe ...
Cakmak, Ismail +10 more
core +3 more sources
Testing and validation of DRIS for apple tree Calibração e validação do DRIS para macieira
Scientia Agricola, 2007 To evaluate three procedures of the calculation of DRIS indices, as well as the efficiency of DRIS as a method for the interpretation of apple tree leaf analyses.
Gilmar Ribeiro Nachtigall +1 more
doaj +1 more source
Assessment of Spring Barley Populations in Comparison to Homogenous Varieties [PDF]
, 2019 The necessity to increase genetic diversity in agriculture has been widely discussed during the last decades. Heterogeneous populations is one of the ways to increase genetic diversity in varieties of self-pollinating cereals.
Gaile, Zinta +4 more
core +1 more source
Spatial imaging of Zn and other elements in Huanglongbing-affected grapefruit by synchrotron-based micro X-ray fluorescence investigation [PDF]
, 2014 Huanglongbing (HLB) is a highly destructive, fast-spreading disease of citrus, causing substantial economic losses to the citrus industry worldwide. Nutrient levels and their cellular distribution patterns in stems and leaves of grapefruit were analysed ...
Brown, PH +6 more
core +2 more sources
Limitações nutricionais de mudas de mangostãozeiro Nutritional limitations of mangosteen seedlings
Pesquisa Agropecuária Brasileira, 2006 Este trabalho teve o objetivo de avaliar, por meio da análise foliar, as limitações nutricionais para produção de mudas de mangostãozeiro. Após 12 meses do plantio, em condições de viveiro, com sombreamento no início do desenvolvimento, foi observado ...
Larissa Alexandra Cardoso Moraes +2 more
doaj +1 more source
Temporary nutrient deficiency - a difficult case for diagnosis and prognosis by plant analysis [PDF]
, 2000 Plant analysis aims to either detect deficiency at the time of sampling (diagnosis) or predict its occurrence at a later stage of growth (prognosis). Its use is based on the presumption that the plant nutrient status will either be constant with plant ...
Bell, R.W.
core +2 more sources