Secretion of organic acids from root
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1 Secretion of organic acids from root Lupin Citric acid Ca phosphate Alfalfa Citric acid Ca phosphate Rapeseed Malic acid and citric acid Ca phosphate Pigeon pea Piscidic, malonic, oxalic acids Fe phosphate Chick pea Citric acid and Ca phosphate succinic acid Fe phosphate Buckwheat Brassica napus Hydrogen ion Ca phosphate
2 Chickpea The bean adapted to Vertisol in India. Grow well on high ph, high Ca, and dry soil. Secretes citric acid.
3 Pigeonpea The bean adapted to red soil (Alfisol) in southern India. Absorbs iron phosphate. Secretes piscidic acid.
4 Sugar Sugar VA mycorrhiza Rhizobium
5 Root nodules of alfalfa Large Medium Small
6 Mycorrhiza in the root of timothy 0.1 mm
7 Ectomycorrhiza Gymnosperm Pinaceae, Cupressaceae Angiosperm Fagaceae, Ulmaceae, Dipterocarpa ceae, Betulaceae, Aceraceae, Salicaceae, Rosaceae, Tiliaceae, etc.
8 Beech root coated by exo-arbuscular fungi
9 VA mycorrhiza Arbuscular Vesicular
10 endo-type arbuscular fungi in orchid Hyphae in soil Digested hyphae Living hyphae invaded in a cell
11 What is VA mycorrhiza? Symbiotic microbes with plant root. Symbiotic relationships between VA and plants Absorption of phosphate and water in plants is promoted by VA. VA accepts photosynthetic products from plant.
12 Effect of mycorrhizal formation on the Above ground growth of plants plant growth. Plants with mycorrhiza Plants without mycorrhiza Level of available phosphate in soil
13 Effect of mycorrhizal inoculation on the growth of leek. No inoculation Inoculated Effect of mycorrhizal inoculation on the growth of leek. Available phosphate (mg/100g) in horizontal axis.
14 Relationship between soil hardness and root elongation Relative root elongation soil hardness
15 Physical properties of soil influencing the root growth Penetration resistance value Inverse proportion Moisture content Inverse proportion Air space volume Direct proportion Bulk density Optimum range around 1.0
16 Comparison of root sections between barley and rice Barley Rice
17 Non rhizosphere soils in upland and paddy fields Redox state Major microbes States of various substances Upland Oxidative Aerobic microbes NO 3-, Fe 3+, MnO 2, SO 4 2- Paddy Reductiv e Anaerobic microbes NH 4+, Fe 2+, Mn 2+, S 2-
18 Rhizosphere soils in upland and paddy fields Nitrogen absorption ph Redox state Upland Nitrate absorbtion CO 2 secretion Increase compared with non rhizosphere Decrease compared with non rhizosphere Paddy NH + 4 absorbtion H + secretion Decrease compared with non rhizosphere Increase compared with non rhizosphere
19 What is good soil for the root growth? Root can develop deep, wide, and healthy, and can supply enough amounts of nutrient and water to above ground part. For this purpose
20 What is good soil for the root growth? Good soil aeration, drainage, and water retention, and soft. Aggregate structure formation Application of organic matter
21 What is good soil for the root growth? Have a good balance in nutrients. Have a proper ph value. Soil diagnosis is carried out. Improvement of soil acidity Application of lime
22 What is good soil for the root growth? Contains organic matter, food for soil microbes and organisms. Soil organisms are abundant. Application of compost and green manure.
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