Nutrition: A comprehensive treatise. Vol. I: Macronutrients and nutrient elements

1966 ◽  
Vol 113 (3) ◽  
pp. 761-762
Author(s):  
Anthony A. Albanese
2011 ◽  
Vol 6 (No. 1) ◽  
pp. 21-29 ◽  
Author(s):  
H. Khaled ◽  
H.A. Fawy

In this study, the effects were investigated of salinity, foliar and soil applications of humic substances on the growth and mineral nutrients uptake of Corn (Hagein, Fardy10), and the comparison was carried out of the soil and foliar applications of humic acid treatments at different NaCl levels. Soil organic contents are one of the most important parts that they directly affect the soil fertility and textures with their complex and heterogenous structures although they occupy a minor percentage of the soil weight. Humic acids are an important soil component that can improve nutrient availability and impact on other important chemical, biological, and physical properties of soils. The effects of foliar and soil applications of humic substances on the plant growth and some nutrient elements uptake of Corn (Hagein, Fardy10) grown at various salt concentrations were examined. Sodium chloride was added to the soil to obtain 20 and 60mM saline conditions. Solid humus was applied to the soil one month before planting and liquid humic acids were sprayed on the leaves twice on 20<sup>th</sup> and 40<sup>th</sup> day after seedling emergence. The application doses of solid humus were 0, 2 and 4 g/kg and those of liquid humic acids were 0, 0.1 and 0.2%. Salinity negatively affected the growth of corn; it also decreased the dry weight and the uptake of nutrient elements except for Na and Mn. Soil application of humus increased the N uptake of corn while foliar application of humic acids increased the uptake of P, K, Mg,Na,Cu and Zn. Although the effect of interaction between salt and soil humus application was found statistically significant, the interaction effect between salt and foliar humic acids treatment was not found significant. Under salt stress, the first doses of both soil and foliar application of humic substances increased the uptake of nutrients.


2021 ◽  
pp. 130352
Author(s):  
Gul Hassan ◽  
Muhammad Asim Shabbir ◽  
Farah Ahmad ◽  
Imran Pasha ◽  
Noman Aslam ◽  
...  

1980 ◽  
Vol 60 (3) ◽  
pp. 873-877 ◽  
Author(s):  
D. C. PARSONS ◽  
G. W. EATON

Prebloom and veraison petiole samples of the locally important grape cultivars Bath, Chelois, Dechaunac, Foch and Okanagan Riesling from 21 commercial vineyards in 1974, 1975 and 1976 were analyzed for N, P, K, Ca, Mg, Fe, Mn and Zn. Location differences were found for K, Mg and Mn and time of sampling effects for N, P, K, Ca, Mg and Mn. There were cultivar effects upon K, Ca, Mg and Zn and cultivar × time effects upon Mg and Mn. Diagnostic ranges of nutrient elements are suggested.


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