J. Jpn. Soc. Soil Phys.
 (E4
No. 21, p. -+1 ,**+

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 * +ῌ * ,E#ects of Long-term Application Use of Compost on the Physico-chemical
Properties of Andosols and Yields of Cabbage and Japanese Radish
Tetsuo KATO* + and Kazuo YONEDA* ,* + Tokyo Metropolitan Agriculture Experimental Station, -ῌ2ῌ+ Fujimi,
Tachikawa, +3*ῌ**+- Tokyo* College of Bioresource Sciences, Nihon University, +200 Kameino, Fujisawa, ,/,ῌ2/+* Kanagawa,

Abstract
Studies were done on the e#ects of long-term use of compost made of cow manure and barks on
the physico-chemical properties of andosol and yields of horticultural crops.

The aim of thestudies was to set standards for soil diagnosis and minimum fertilizer application schedules.

The

yields of cabbages and Japanese radishes were greatly a#ected by the weather conditions, andthey varied considerably, almost two folds between the lowest and highest yields in cabbage
heads and more than three folds in the weight of Japanese radish roots.

The e#ect of theapplication of the compost was not apparent in the ﬁrst year on the yields of cabbages andJapanese radishes.
years.

But the yields increased more than l*῍ to more than -*῍ in the following

However, their yields were not much greater than those in the plots that had only

chemical fertilizers, though the compost was given to them for many years.

This trend was seenin the yield of Japanese radish roots. If the soil contained a certain amount of phosphorus, thee#ect of phosphorus in the compost on the yields was not obvious.
With regard to the physical property of soil, the di#erence between the sold phases of the plots
with and without compost applications tended to widen.

Even when bases were applied equally,

the amount of bases in the soil decreased rapidly in the plots with good absorption property while
they accumulated in the plots where crop yields were low with not nitrogen fertilizer. Cationexchange capacity (CEC) increased even in the increased with application of the compost andfused magnesium phosphate.

CEC increased even in the no-nitrogen plots when phosphorus wasapplied. Total carbon and total nitrogen increased every year when - t/+*a of compost wasapplied yearly, though the amounts had some ﬂuctuations.
Key Words : andosol, long-term application use of organic matter, physico-chemical properties,
yields of cabbage and Japanese radish


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Change in exchangeable CaO, exchangeable MgO and exchangeable K, O content of soil.

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

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Change in T-C and T-N of soil.

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