A LA VO UK A 
Manjo-Abril — 19 I 1 -' 
IK 
As necessidndc* brusilelrns quanto a mu 
t^rin orgAnicn qm* tern do nor incorporadn no 
nolo no* ponton dr mulor intcnsidndr dr cx- 
plrnv« ngrlcoln drvrtn orfnr peln rasa do.s ini. 
IhoOS do tnrladas por non. Para cnnscgtlir Ulna 
till uiiiH.Mi dr mntcrin orgAnicn serin Mil, a 
no**!) vrr, plnnrjiir: 
1. " - A rrenyno dr grande* centro* pro- 
dtilores dr scmenles dr ]ilantas drslinndus a 
adilbai'iio vrrdr, com prcfercnc in dr lcgumi- 
no*a*. 
2. ” Crrnrrio dr granites rrnlros produ- 
torcn dr "roinposlo" Indorr, llrrrari, rtr., 
Hondo tnnihem di.slribuidas inslruyoes drla- 
Hindus a oh Javrailorrs. 
CONCLUSOHS 
Oh xcguintrx ponton drvrm nrr ponton oni 
evidcnrin para a comprcensuo da neccssidade 
e imporlilnria da mutcrla orgAnicn nil conscr. 
vuvuo do .nolo; 
1. " - O solo e a main imprtaonlr r prc- 
cio.na rrnrrva quo uni pais podr possuir. 
2. " • E neccnsArio por esse motivo con- 
sorv/t-lo. 
3. * Drvr srr dotulhadanirntr rxplicnda 
aos intrrrnsailos, lavradorrs on nAo, o quo dr- 
ve srr rntendido por "eonservncno do solo". 
4. “ - — E mecesnario mantrr a cobrrtu ve. 
grtal prrnianentc a fim dr protrger o *olo con- 
tra a e rondo. 
5. " — O tiiimun drvr srr inantido no solo 
mrrrr.rndo rondruuyiio todus as prAticns agri- 
colas ipir possum drstrui-lo tain como a drr- 
rubada coin drsnudainonto cxccsstvo r pro. 
longado, rsprcialmrntr cm zonas com forte 
declivr on proximo* its cabcroiras «los rloa r 
manaiiu'iuis, rvilar o uso da qurimudii. 
0“ A falta dr btiiniiH no nolo r o main 
seguro cuniinho para a rromio, por provocur 
ulterardrs nil cslrutura do nirsnio, 
7. " I lii muita rrlava outre a frrtilidadr 
do solo c on trorrs dr humus r cal quo o mrs- 
iiiii oncerra. 
8. " An leguminosa* sflo an plauta* main 
aconsclhiivris para a udllbnyiio vrrdr. 
9. ” Sera dr grande utilidadr a rrenrno 
ile rrnlros produtorrs dr nrmrntes dr legumi- 
nosus, rm jionto.s rncolhidos do trrritArio na- 
cional, a fim dr forncre-lns non interessados. 
10. ‘* Srrii tumblm litil r rntabrlecimrn. 
to dr graiidrs rrnlros dr prodliyAo dr M coni 
posto” rm locals aronsrlliavris prlas nerrvsi- 
dadrs da produrao agricola, drvrlldo tamlirm 
nrr distrilmidas aos lavradorrs iuslrtirdrs no 
bre o niodo dr prrpara-lo. 
DIHI.IOGPAFIA 
1 <1. T. Wrrnch Iteconatructloa by 
wav tlx* sell. 
2 I *. V. Jarkii & (). Whyte Tlir Pape 
of the rarlb. 
3 K. M. Growther Fcrlilisern dur. 
in( the war and after. 
•I Soils and turn U.S.A. Yearbook 
of Agriculture 1938. 
5 Moore Good huxbandry. 
(i Wrir Soil Science. 
7 - Waksman S. Jk lyrp K.H.N. — Goll- 
trihulion of our knowl. Ghent, nut- 
humus Soil Science, vol. 31, N- 
1. 1932. 
8 Gustafson Soil conservation. 
9 — Dennett Soil conservation, 
in Pieters Green manuring. 
1 1 Mr Georgi i in- base exchange 
properties of sell organic matter • 
Journ. Am. Soc. Agron., Vol. 23 ■ 
N. 5 pAg. 331 - 1931 
12 — (i. II. Glarke -- The study of the 
soil in the field. 
13 Theodureto dr Gamargo r P. Vif 
grler — Dol. Tch. 40 Institute* 
Campinas. 
14 Havrr-Soil physics. 
IT> Hall hr Soil. 
Ill • Hobison Soils. 
17 l«utz Jk Ghundlrr - Forrnt Soils 
18 Kellogg The soils thal support ns- 
19 Alharoda I'd Suelo, 
20 Hussrll Soil Gonditions and 
plant growth. 
21 William Vogt Id hombrr \ I** 
Tirrra K. I', dr Venezuela - 
Min. dr Agrir. 1948. 
22 Jonnv Factors of soil formation- 
23 Vagrlrr Tropisrhr mid Subtl' 0, 
pisebr Dodrnkundr, 
21 Stanley It, Wbitrhrad Gardner's 
I .u Hi. 
25 i ' bat t i vd-dogie Vol, 2 
Pc'dologir agricOlr, 
