Tillage and mulch effects on soil physical environment, root growth, nutrient uptake and yield of maize and wheat on an Alfisol in north-west India

1994 ◽  
Vol 32 (4) ◽  
pp. 291-302 ◽  
Author(s):  
C.L. Acharya ◽  
P.D. Sharma
Keyword(s):  
Root Growth ◽  
Nutrient Uptake ◽  
Physical Environment ◽  
North West

scholarly journals Influence of Atomization Nozzles and Spraying Intervals on Growth, Biomass Yield, and Nutrient Uptake of Butter-Head Lettuce under Aeroponics System

Agronomy ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 97
Author(s):  
Mazhar H. Tunio ◽  
Jianmin Gao ◽  
Imran A. Lakhiar ◽  
Kashif A. Solangi ◽  
Waqar A. Qureshi ◽  
...  
Keyword(s):  
Root Growth ◽  
Nutrient Uptake ◽  
Nutrient Solution ◽  
Biomass Yield ◽  
Chemical Properties ◽  
Cultivated Plants ◽  
Growth Ratio ◽  
Shoot Ratio ◽  
Droplet Sizes ◽  
Root To Shoot Ratio

The atomized nutrient solution droplet sizes and spraying intervals can impact the chemical properties of the nutrient solution, biomass yield, root-to-shoot ratio and nutrient uptake of aeroponically cultivated plants. In this study, four different nozzles having droplet sizes N1 = 11.24, N2 = 26.35, N3 = 17.38 and N4 = 4.89 µm were selected and misted at three nutrient solution spraying intervals of 30, 45 and 60 min, with a 5 min spraying time. The measured parameters were power of hydrogen (pH) and electrical conductivity (EC) values of the nutrient solution, shoot and root growth, ratio of roots to shoots (fresh and dry), biomass yield and nutrient uptake. The results indicated that the N1 presented significantly lower changes in chemical properties than those of N2, N3 and N4, resulting in stable lateral root growth and increased biomass yield. Also, the root-to-shoot ratio significantly increased with increasing spraying interval using N1 and N4 nozzles. The N1 nozzle also revealed a significant effect on the phosphorous, potassium and magnesium uptake by the plants misted at proposed nutrient solution spraying intervals. However, the ultrasonic nozzle showed a nonsignificant effect on all measured parameters with respect to spraying intervals. In the last, this research experiment validates the applicability of air-assisted nozzle (N1) misting at a 30-min spraying interval and 5 min of spraying time for the cultivation of butter-head lettuce in aeroponic systems.

scholarly journals Effect of Potassium Deficiency on Root Growth and Nutrient Uptake in Maize (Zea mays L.)

2017 ◽  
Vol 08 (11) ◽  
pp. 1263-1277 ◽  
Author(s):  
Qi Du ◽  
Xinhua Zhao ◽  
Chunji Jiang ◽  
Xiaoguang Wang ◽  
Yi Han ◽  
...  
Keyword(s):  
Zea Mays ◽  
Root Growth ◽  
Nutrient Uptake ◽  
Zea Mays L ◽  
Potassium Deficiency

Links between language and society among the Murui of north-west Amazonia

2021 ◽  
pp. 215-234
Author(s):  
Katarzyna I. Wojtylak
Keyword(s):  
Market Economy ◽  
Physical Environment ◽  
Belief System ◽  
Linguistic Features ◽  
Social Hierarchies ◽  
North West ◽  
Northern Peru

Murui, a Witototan language spoken in southern Colombia and northern Peru, has at its disposal a number of linguistic features that mirror the structure of the Murui society, the Murui belief system, the environment the Murui people live in, and their means of subsistence. Demonstrable associations between linguistic and non-linguistic features (the so-called “integration points”) discussed here are: classifiers (and their significance in terms of the Murui beliefs, religion, spirits, and dreams, and the means of subsistence), possessive marking (vs. the relations within the Murui community, social hierarchies, and kinship categorization), spatial adverbs (vs. the means of subsistence and physical environment), and linguistic avoidance terms (vs. the beliefs, religion, spirits, and dreams). As the Murui people are gradually being drawn into the Colombian market economy and relevant cultural practises become obsolete, some correlations described here are more prone to disintegrate than others.

scholarly journals Genotypic Variation on Root Growth and Nutrient Uptake in Corn and Soybean

age ◽  
2019 ◽  
Vol 2 (1) ◽  
pp. 1-12 ◽  
Author(s):  
A. T. Rosa ◽  
D. A. Ruiz Diaz ◽  
F. D. Hansel ◽  
J. S. V. Sebastian ◽  
E. A. Adee
Keyword(s):  
Root Growth ◽  
Nutrient Uptake ◽  
Genotypic Variation

Soil physical environment affecting root growth of upland rice

1979 ◽  
Vol 93 (3) ◽  
pp. 719-726 ◽  
Author(s):  
S. Kar ◽  
S. B. Varade ◽  
B. P. Ghildyal
Keyword(s):  
Root Growth ◽  
Bulk Density ◽  
Physical Environment ◽  
Oxygen Diffusion ◽  
Dry Weight ◽  
Moisture Stress ◽  
Rice Root ◽  
Soil Types ◽  
Low Density ◽  
Depth Of Penetration

SUMMARYRoot growth of rice (Oryza saliva L.) is frequentlyinhibited by an adverse physical environment resulting from high moisture stress and strength of soilunder upland conditions, and the effects are often reflected in poor performance of the crop. This necessitates a critical understanding of rice root growth under varying soil physical conditions.The growth responses of the rice root system to the interaction between moisture regime and bulk density of soil as well as to the induced soil physical characteristics were assessed under controlled glasshouse conditions. Four moisture regimes: 0 (M1), 0–20 (M2), 0–350(M3), and 350–10000 (M4) mb, were superimposed on low, medium and high bulk density treatments in clay, loam and sandy loam soils. The soil physical environment was characterized by measurements of moisture distribution, penetrationenergy and oxygen diffusion rate in soils as functions of depth.A low moisture stress of 20 mb in low density soils favoured rice root growth. In low density soils, even though the number of roots at the base (proximal end) was maximum under M1, the depth of penetration, volume and dry weight of root were significantly more underM2 than under M1; M3 and M4. Irrespective of bulk density, even though oxygen diffusion rates in soils under M3 and M4 were greater than those under M1 and M2, the number of roots at the base, volume and dry weight of the root system decreased under M3 and M4 owing to low moisture content and high penetration energy in the surface layer (0–5 cm) of all the soil types. Lower moisture content and higher penetration energy at higher bulk densities of the soil types significantly reduced the root growth and especially the depth of penetration.

The importance of environmental factors in soil fertility assessments. II.* Nutrient concentration and uptake

1974 ◽  
Vol 25 (2) ◽  
pp. 309 ◽  
Author(s):  
RC Stefanson ◽  
N Collis-George
Keyword(s):  
Soil Fertility ◽  
Soil Temperature ◽  
Nutrient Uptake ◽  
Physical Environment ◽  
Nutrient Concentration ◽  
Incident Light ◽  
Dry Weight ◽  
Plant Performance ◽  
Plant Responses ◽  
Wide Range

Lettuce plants were grown in two soils under a wide range of controlled conditions in the glasshouse. Assessments were made of the effect of soil temperature, incident light and season, in terms of the nutrient concentration and nutrient uptake in the plant tissue, which was analysed for nitrogen, phosphorus, potassium, magnesium, calcium and sodium. Both the concentration and the uptake of each nutrient were affected significantly by soil temperature and incident light, both between and within seasons. The type of soil had an effect on these estimations, but its significance could not be tested statistically. A considerable number of first and second order interactions between components of the physical environment affected the quantities being examined. These interactions were statistically significant. The value of each nutrient analysed, which is an aspect of plant performance, reflected changes in the physical environment independently of the other nutrients. Often a particular nutrient showed no coincident pattern of responses to the environment when these were measured in terms of dry weight, nutrient concentration in the tissue, or total nutrient uptake. Each nutrient concentration and each nutrient uptake varied as micrometeorological factors in the glasshouse changed. Hence, ambiguous assessments of soil fertility were obtained with all measured plant responses. ____________________ *Part I, Aust. J. Agric. Res., 25: 299 (1974).

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