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Fertilizer requirements of soybean (Glycine max (L.) Merrill) after corn and lowland rice / by Vilma C. Constante

By:

Constante, Vilma C [author]

Contributor(s):

Aganon, Clarita P [adviser]

Material type: Text

TextLanguage: English Publication details: Muñoz, Nueva Ecija : Central Luzon State University, 1986.Description: xix, 100 pages : illustrations ; 28 cmContent type:

text

Media type:

unmediated

Carrier type:

volume

Subject(s):

DDC classification:

635.655 C76 1986

Online resources:

Click here to view thesis abstract and table of contents

Abstract: CONSTANTE, VILM: E., Institute of Graduate Studies, Central Luzon State University, Mufioz, Nueva Ecija, Philippines, June, 1986. FERTILIZER REQUIREMENTS OF SOYBEANS (Glycine max (L.) Merrill) AFTER CCRN AND LOWLAND RICE. Adviser: Prof. Clarita P. Aganon The study was conducted to determine the following: the fertilizer requirements of soybeans after corn and lowland rice; the yield performance of two soybean varieties as influenced by different fertilizer levels; and, the effect of base~crops on soybean yield. Also, the study aimed to evaluate the effects of the different levels of fertilizer on nodulation and plant composition. Split-plot in RCBD with three replications and twelve treatment combinations was used in the study. Two soybean varieties ($J~2 and UPL Sy-2) were assigned in the main-plot while the six fertilizer levels were assigned in the subplots. In the corn-based cropping system, the heaviest seeds and the most number of effective nodules were obtained from inoculated plants applied with 50 kg P05 + 30 ke Kp0 per hectare. These results were higher than the control by 20.37 and 61.20 per cent, respectively. The same treatment also produced the highest seed yield of 1.49 t/ha which was 52.45 per cent higher than the control. The highest number of filled pods per plant and the tallest plant were those applied with 30-30-30 kg N-P30,-K50 per hectare. In the rice-based cropping system, the highest number of filled pods (40.42 per plant) and the highest seed yield (2.41 t/ha) were observed in the inoculated plants applied with 40 kg K50 per hectare. These were higher than the control by 24.70 and 1.45 tons, respectively. ‘The highest number of effective nodules per plant was obtained from inoculated plants applied with 40 kg P05 per hectare. In both sites, heaviest seeds were obtained from inoculated plants applied with 30 kg P205 + 30 ke K0 = per hectare, while the tallest plants were those applied with 30-30-30 kg N-P50,-K,0 per hectare. There was no significant difference on seed yield between the two cropping systems. Plant analysis indicated higher nitrogen content in soybeans where the preceding crop was corn while the P content was higher where the preceding crop was rice. Potassium uptake was not affected by the cropping systems.

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Holdings ( 1 )
Title notes ( 4 )

Holdings
Item type	Current library	Collection	Call number	Materials specified	URL	Status	Notes	Date due	Barcode
Theses / Manuscripts	Ladislao N. Diwa Memorial Library Theses Section	Non-fiction	635.655 C76 1986 (Browse shelf(Opens below))		Link to resource	Room use only	T-2453		00007095

Thesis (MS-Crop Science) Central Luzon State University

Includes bibliographical references.

CONSTANTE, VILM: E., Institute of Graduate Studies, Central Luzon State University, Mufioz, Nueva Ecija, Philippines, June, 1986. FERTILIZER REQUIREMENTS OF SOYBEANS (Glycine max (L.) Merrill) AFTER CCRN AND LOWLAND RICE. Adviser: Prof. Clarita P. Aganon

The study was conducted to determine the following: the fertilizer requirements of soybeans after corn and lowland rice; the yield performance of two soybean varieties as influenced by different fertilizer levels; and, the effect of base~crops on soybean yield. Also, the study aimed to evaluate the effects of the different levels of fertilizer on nodulation and plant composition.

Split-plot in RCBD with three replications and twelve treatment combinations was used in the study.

Two soybean varieties ($J~2 and UPL Sy-2) were assigned in the main-plot while the six fertilizer levels were assigned in the subplots.

In the corn-based cropping system, the heaviest seeds and the most number of effective nodules were obtained from inoculated plants applied with 50 kg P05 + 30 ke Kp0 per hectare. These results were higher than the control by 20.37 and 61.20 per cent, respectively. The same treatment also produced the highest seed yield of 1.49 t/ha which was 52.45 per cent higher than the control. The highest number of filled pods per plant and the tallest plant were those applied with 30-30-30 kg N-P30,-K50 per hectare.

In the rice-based cropping system, the highest number of filled pods (40.42 per plant) and the highest seed yield (2.41 t/ha) were observed in the inoculated plants applied with 40 kg K50 per hectare. These were higher than the control by 24.70 and 1.45 tons, respectively. ‘The highest number of effective nodules per plant was obtained from inoculated plants applied with 40 kg P05 per hectare.

In both sites, heaviest seeds were obtained from inoculated plants applied with 30 kg P205 + 30 ke K0 = per hectare, while the tallest plants were those applied with 30-30-30 kg N-P50,-K,0 per hectare. There was no significant difference on seed yield between the two cropping systems.

Plant analysis indicated higher nitrogen content in soybeans where the preceding crop was corn while the P content was higher where the preceding crop was rice.

Potassium uptake was not affected by the cropping systems.

Submitted to the University Library 03-31-2003 T-2453