cbse cbse class 9 ncert solution science improvement in food resources

E NCERT Solution: Scie

Ch 15

Improvement i Resources

ns

On Page 204

Que 1:Wha ge cereals, pulses, frgetables?

Stion:things we geroereals, pulses, frgetablese as follows:

Cere (acezetc.): aree sources of carbohydrahic energy.

Pulses a, grasoybean): are source ofins.

Vegetables and fruits: provide us vitamiineraarbohydraoteinats.

On Page 205

Que 1:do biotic and abiotic factors affect crcti

SFach affect crop ption are:

Bic fach cause of grains are rodennd atic fach aperature, humiy, etc.

Affecoth bic anbiotic fac crop productiarehe way

Weight loss

Infestatioc

Petion aity

loration

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Que 2:What aresirabagharactec crop im

SDesiragronomic characre:

Desirable characters for fodder care tallness aofrancgd

Dwarfness ied in cerea sfewer ene cey these crops.

On Page 206

Que 1:What arecronutriehy are they called macron?

S ronutrre esseaments whicre requirey pla quatie Some ofin macronutrients are:

N, P, Sre nd

is found llll.

(iii) Mg is a pa chloryll.

Que 2:do plants get nutnts?

SSoilhe mairce of e plants. P by

om theil aey the roots iy yleue throughout they.

On Page 207

Que 1:Ce the usenure afeliseaang soil fety.

SUse manure mnuty:

Manures areery e of organic matteor the soil. Humus helps teetention capacityandy soil ange in clayey soil.



Manures are the sourceganisms like soil frdlycia.

ferers on soil qu

Excef fertilisers ca ynel and hence the rate of soil e increase

(ii) Conti ofrtilisecreases the organic matterh reduce y of aant roots det suffeyge

On Page 208

Que 1:We fow cll gnefits? Why?

Fars usegh-lity seeds, do not adopt irrigatifesers.

(ii) Farmers use ordry seeds, adrrigatise fesers ae c protecti sure

ars useality seeds, adrrigatie fertilizer and use crotecti sure

S

(iiird option is thest option which prdes the best conditions teost beneor this, farlityeds, ad irr, use fezeand userop

protection meaes. Thisae of only quality ds i sufient until

y are properly irrigated, enriched with fezers acted frc factors.

On Page 209

Que 1: Why should preventing meaeogol me preferre protecting c

S In plants, diseases are caby Pagensemove pathogens, some preventive sure aogicaontrol me are whicre


NCERT Solution: Scie

Miise pollfecting quality

Sim

Ecc

Que 2:What facy be responsior grains during storage?

SF are the facresponsior loss of grains dug storage:

c factors like humidity and temperature.

(ii) Bic facke insects, rodents, birds, mi acte.

On Page 210

Que 1: Wthod is commye impr cattle breeay? How is ceedingeful in aals?

Spre catteed breee generallye croeeg method. It is a

process in which a cis made been indigenous vaties of cattle by exc breeds to get a ceed which is high-yielding. During cross breeg, the deeharaceo

consideratiree offspringd beghould have early ity and should be retant to diseases and cliions.

On Page 211

Que 1: ss thecations of the f stateIerenge that ry is India's most efient conver offibre ftufwhic con) into highlya

S

poultryare efficient conve agricuray pucticularly

cheapeibrous wastes inglity meat and in providing eggear nutrient ee gn statement irectly said fore poultry birds.



Que 2:Whaanagement practices are comn dairy and poultry farming?

S

Well denend hygenic shelte

Propeood is requireet goy egg and mea

Compleotectiom diseases causing agents like virus, bacia oung

Que 3:What are the differences between brers ayea thenageme

S

poultry bird gng t are calleilers and the egg laying birds are called layers. ratired for brers should be rich in protewith sufient fa food

lso have higamin-nd K. Layere egce agng.

On Page 213

Que 1:are fish obtained?

SFish are obtaineyway

(i) Ca fisheries froal resources

ish fa by culture for cercposes.

Que 2:What is the age oite fure?

S

Combinati f six fpecies in afish pond is known aomposite fish cure. Ba of selecti specod has so thaheypete for food amonglves. resultvailable in all parts of the pond is utilized competing with each other. Tncreaseish yield from the pond.



Que 3:What areable characte thetie hy pti

SDesiraharacs in vatie honey ption are:

(a) Capacity cecarge a of honey.

(b)Stay in beehive for a longee.

(chould have gooreeding capacity.

Que 4:Whas pasturage and how is it relatey pton?

SFlowers availaorc aen cection is known as page . Theality

ay dependeaty of page aers availa

r

Que 1:Exny method of cuctiiyield.

SInte is a mee agh yielding crotion. Is method,

two or crops are graneouslyhe fitte fef cltewith a fef second crop.

Exae: soybean, maizeinger millet (baa) and caea (labia).

The seted crops d have different nutrierequireThis ensureim lisatian of the nutrients suppl. Ievents pests and diseases fromaghe lingrop in a field. This meives a better crop y

Que 2:Why arenure anezers used in fields?

Sessential nutrients of the soil are fuly mae fezers supply.

reforey help iood vegegth, giving ralthyanthat rgrap producti



Que 3:What are the antages of inter-crong acotation?

Stageer-cropping

fertility.

Saveme and lab.

Increasectiyea.

Both crops can be eay haaseparately.

tages of crop rotat

Ie fetiy.

Reeand disease

Hen weed control.

Atirticular nutrient from soil.

Que 4:Whas genetic man? How it usefIn agural practices?

STransferring desirabgenes frnt far the producti

vaties withsirable charactes genetic.

Exae: Pranching in foraps, high yiengrieties in maize wheaetc.

s in agural pract

Better adaty to adve environmental conditi

Csiraeature

Hen increag yand quality.

atiri.

Que 5:do storage grain losses occur?

S

eason forlosses ofge grais abiotic ac fac

abiotic fac Moisture aerature



Theic factors: Insects, rnts, birds, mitec

Que 6:ooal husbay practefit fa

S

Benegood farmingactice Irovideoved breeof domec aals.

(ii)It reaseoduction oducts like and mea

rr sheltefeedingare action against disesase help the fars to impr their ecmic cions.

Que 7:What arenefits of cattle fa?

S

Beneof cattle farming tiincrease

(ii) Glityabre and ski ed of drauan be obtaine

Que 8:Foreasinguction, whas common in poultry, eeg?

S

Ceeg is a comctice been pory, e keeg for increaguctio

Que 9:do youerentiateea fishing, maure and acure?

S



Differenceeeapture fishingiculture and acure

S.FingMaricultureacu

1.Fish are obtained faturalA method of maePti fish

reekes, canafish curehefreshwa and

e.bracter

rees.

2.I Locating fs easy anan beFish caetedCan beted easily

cay using fishing newith thelp ofand caught using

sa

echosounders. These can be caught by

y kinds of fishing ne fishing

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cbse cbse class 9 ncert solution science improvement in food resources

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