Journal of Agricultural and Biological Science       ISSN 1990-6145
 
 
 

 
Journal of Agricultural and Biological Science                      March  2007 | Vol. 2  No. 2

 

Title:

Identification on suitable rice variety adaptability to aerobic irrigation

Author (s):

G. James Martin, P. K. Padmanathan and E. Subramanian

Abstract:

A field experiment was conducted at Central Farm, Tamil Nadu Agricultural University, Coimbatore to screen suitable rice varieties for aerobic rice cultivation. 12 rice varieties viz., ADT 38, ADT 39, ADT 43, ADT 46, CO 43, CO 45, CO 46, CO 47, White Ponni, PMK 3, MDU3 and ADS 16 were evaluated in randomized block design with three replications. The upland rice variety PMK 3 produced the highest grain yield of 3684kg ha-1 and it was significantly superior to other rice varieties. The next best variety was ASD 16 (3138kg ha-1) and it was on par with MDU 3 (2943kg ha-1) and CO 43 (2805kg ha-1).  The water productivity varied among the varieties depending upon their field duration. The combined amount of effective rainfall and irrigation water from sowing to harvest varied from 520 to 650 mm, compared with 1200-1300mm in lowland rice. The variety PMK 3 with duration of 137 days registered the highest water productivity of 7.06kg rice per ha mm of water. White Ponni, which matured in 184 days, recorded the lowest water productivity of 1.5kg of rice per ha mm of water. The second best variety was ASD 16 (5.79). Compared with lowland rice, water consumption in aerobic rice was lower than 50% and water productivity was 60% higher.

 
 
 
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Title:

Effect of applied calcium-boron ratio on the accumulation of nutrient-elements by radish (Raphanus sativus L.)

Author (s):

M. Tariq and C. J. B. Mott

Abstract:

The present study was based on the hypothesis whether applied Ca/B ratio has an association with other plant nutrients. A green house study was carried out in sandy heath land soil, growing radish (cv. French breakfast) as a test crop. The experiment was laid out in a randomized complete block design and replicated three times. Different Ca/B ratios were applied 2000:1, 1000:1, 500:1, 250:1, 125:1 and 25:1, corresponding to soil solution ratios 7959:1, 4369:1, 1035:1, 851:1, 486:1 and 45:1 along with a basal dose of all essential nutrients. Significant treatment effects were observed in the growth response of radish and maximum dry matter yield of tops and roots were recorded at Ca/B ratio of 1035:1 in soil solution or applied 500:1. Results further revealed that B deficiency and toxicity symptoms were clearly apparent on plant leaves when the radish plants received higher and lower Ca/B ratios, respectively. However, no visible symptoms of other nutrients were found on plants during growth. The concentrations of P, K, Ca, Mg, Na, Mn and B in plants were significantly affected, while the total uptake of all nutrients were significantly changed due to Ca/B ratios in soil, in terms of applied or in soil solution, and showed close similarity to growth response. Correlation between Ca/B ratios and the concentrations of P, Ca, Mg, Na, Cu, Fe, Mo and B attained statistical significance, while in case of total uptake only N, P and Na showed significance, suggesting Ca/B ratios have some association with the other plant nutrients. It appears from the present study that no single or narrow range of Ca/B ratios in soil, whether applied or in soil solution is best for the concentration and total uptake of plant nutrients studied. However, considering the test soil from sandy heath land and the radish crop it seems that the best Ca/B ratios for the concentration and total uptake of nutrients ranged from 1000:1 to 500:1, corresponding to soil solution ratios ranged from 4369:1 to 1035:1. However, the role of Ca/B ratio on the behavior of plant nutrients is still not well defined, and further experimentations are desirable in this field.

 
 
 
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Title:

The role of intercropping on yield potential of common vetch (Vicia sativa L.)/oat (Avena sativa L.) cultivated in pure stand and mixtures

Author (s):

Canan TUNA and Adnan ORAK

Abstract:

The present experiment was conducted under the ecological conditions of Tekirdag, Turkey during 1999-2001. Three levels of different mixtures vetch (Vicia sativa L.) and oat (Avena sativa L.)  (25% vetch + 75% oat, 50% vetch + 50% oat, 75% vetch + 25% oat) and pure common vetch (100% vetch + 0% oat), pure oat (0% vetch + 100% oat) were used as experimental treatments. The objective of this research study was to determine the effects of different mixtures ratio on yield and yield components of common vetch (Vicia sativa L.) + oat (Avena sativa L.). Seeds were broadcasted at a rate of 180kg ha-1 for the grasses and 120kg ha-1 for the vetch. Field trials were arranged in a randomised complete block design with three replications. Plant height, number of branch per plant, number of pods per plant, herbage yield and dry matter yield were recorded. The two years’ results showed that the highest and dry herbage yields were obtained from 25% vetch (Vicia sativa L.) + 75% oat (Avena sativa L.). As a result, the best mixture was 25% vetch (Vicia sativa L.) + 75% oat (Avena sativa L.). By this mixture, 25.3 t/ha herbage yield and 6.5 t/ha dry matter yields were taken.

 
 
 
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Title:

Storage stability of persimmon fruits (Diospyros Kaki) stored in different packaging materials

Author (s):

Dilawar Khan, Arbab Riaz Khan, Saiqa Bibi, Sajid Ali and Iqtidar A. Khalil

Abstract:

An experiment was conducted to evaluate the storage stability of persimmon (Diospyros kaki) fruits in different packaging materials, at NWFP Agricultural University, Peshawar. Evaluation was made for changes in chemical characteristics of the fruit during three storage intervals packaged in seven different packaging materials. pH, TSS (0brix), acidity percentage  and  moisture percentage were determined at five days interval after storage for three intervals. pH was non-significantly affected during storage intervals, while TSS was recorded to be increased. Acidity percentage was first increased and then decreased during storage. Fruits packaged in rice paper showed considerable decrease in pH, TSS (0brix) and acidity percentage while an increase was observed for moisture content. However, the effect of other packaging materials was almost non-significant on the tested parameters during our study.

 
 
 
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