Biological approaches to sustainable soil systems - Part 3 potx

... (12 t) 53. 6 12.4 79.8 17 .3 - - Gliricidia sepium (8 t) 43. 1 10.9 68 .3 14.9 10 .3 Leucaena leucocephala 2 12 t 32 .6 - - - - 13. 0 - - Nonfertilized 17.0 6.4 28.1 7.8 4.2 SED 5 .3 2.06 11.2 3. 04 1.2 F ... biological factors that help to maintain high levels of soil fertility in diversified tree-crop systems, an important complementary approach to impr...

Ngày tải lên: 11/08/2014, 17:21

... Can. J. Soil Sci., 48, 32 3 33 0, 1968. With permission. q 2006 by Taylor & Francis Group, LLC Biological Approaches to Sustainable Soil Systems3 6 biological activity are low or nil due to suboptimal ... 22 2 .3 Managing Soil Systems for Tropical Agriculture 22 2 .3. 1 Agroforestry 23 2 .3. 2 Weed Management 23 2 .3. 3 Crop Combinations and Rotations, and Use of...

Ngày tải lên: 11/08/2014, 17:21

... aggregating factors. Then at a 20 0- m m scale, roots, and fungal hyphae bind these particles together. The resulting soil is a matrix of mineral particles Biological Approaches to Sustainable Soil Systems6 2 q ... high 1.5 33 7 (toxicity) 2 Low 3. 5 24 T 2 03 (Fe inefficient) 0 Medium 1 .3 95 2 Very low 2.2 8 (deficiency) The Rhizosphere: Contributions of the Soil Root Int...

Ngày tải lên: 11/08/2014, 17:21

... Management of Agricultural Soils 631 43. 4 Soil Systems and Climate 631 43. 4.1 Soil Systems and Atmosphere 632 43. 4.2 Soil Systems and Hydrology 632 43. 5 Discussion 633 References 634 There are many interactions ... Change 626 43. 3.1 Soil Systems as a Source of Greenhouse Gases 628 43. 3.2 Soil Systems as a Sink for Greenhouse Gases 628 43. 3.2.1 Use of Bi...

Ngày tải lên: 11/08/2014, 17:21

... research. c01.indd 3c01.indd 3 6/5/09 2:09 :31 PM6/5/09 2:09 :31 PM Introduction 5 urban neighborhoods forced us to transcend the disciplinary boundaries of our profes- sional training and to learn new ... 12 What is benefi - cial at the individual level may be harmful to population health and to social justice. To avoid this unintended effect, urban public health planners...

Ngày tải lên: 02/07/2014, 07:20

... and to hold the corneal shield in place (Fig. 3- 1 1). Figure 3 9 Incision of the conjunctiva below the tarsal plate. 39 SURGICAL ANATOMY Lower Eyelid In addition to an understanding of the anatomy ... noted (Fig. 3- 7 ). The surgeon will be able to evert the lower lid more effectivelly. Figure 3 5 Anatomic dissection shoing result after initial canthopexy illustrated in Figure...

Ngày tải lên: 11/08/2014, 13:20

... 65.5 42 .3* 43. 2 38 .7 ** 250–2,000 µm 17.2 31 .2* 20.1 23. 8 106–250 µm 5.9 10.0* 9.9 10.4 ** 53 106 µm 2.5 5.8* 3. 5 2.9 < 53 µm 8.9 10.6 23. 4 24.2 ** a Values are normalized to a sand-free basis. b Asterisks ... 19 .3 Bacteria Respiration 2,2 53 3,159 2,448 2,904 4,701 6,0 63 % Total 64.7 74.1 61.2 71.4 62.8 72.8 Protozoa Respiration 132 208 56 104 188 31 2 % Total 3. 8 4....

Ngày tải lên: 11/08/2014, 15:20

... −−−  24 1 (1 )( ) nnn Li Li HH λξ − −− (44) Momentum equation: 11111 32 32 1 33 33 1 31 1 32 32 33 33 1 31 3 32 1 33 1 32 1 33 ()() ()() 2( )()(1)( ) (1 )( ) nnn nnnnn nnn nnn g ilii g ili nn nnnn ... taken as reference. Basis set: 1: 6 -3 1G(d,p); 2: 6 -3 11G(d,p); 3: 6 -3 1++G(d,p); 4: 6 -3 11+G(d,p); 5: 6 -3 11G(2d,2p); 6: 6 -3 11++G(2d.2p). The CCSD(T)/ 6 -3...

Ngày tải lên: 19/06/2014, 11:20

... Eq.( 3- 6 ) and Eq.( 3- 7 ) into Eq.( 3- 5 ), the electrokinetic potential (E x ) can be written as follows: 11 (,) (,) ()(1) hw e hw kk x o uyz yzdydz E wh k ρ λ −− =− + ∫∫ ( 3- 9 ) Both the Poisson-Boltzmann ... heating power required in the experiments. Boron (atoms/cm 3 ) T ( o C ) 30 40 50 60 70 80 90 100 110 ΔR/R (25 o C) -0 .6 -0 .5 -0 .4 -0 .3 -0 .2 -...

Ngày tải lên: 20/06/2014, 06:20

... outcome 29 , 31 so as to identify the factors that are most malleable to change. 138 , 139 Finally, once key intervention strategies have been implemented, investigators must evaluate ... child health out- c04.indd 79c04.indd 79 6 /3/ 09 11:59:57 AM6 /3/ 09 11:59:57 AM 80 An Ecological Model of Urban Child Health come. 138 , 139 This evaluation process will also...

Ngày tải lên: 02/07/2014, 07:20