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Influence of Poultry Manure and NPK Fertilizer on Hydraulic Properties of a Sandy Soil in Ghana

Author(s) agree that this article remain permanently open access under the terms of the Creative Commons Attribution License 4.0 International License

Abstract. Field experiment was conducted during the 2008 major rainy season at the experimental field of the Department of Horticulture, Faculty of Agriculture, KNUST to test the effects of poultry manure (PM) and NPK fertilizer on the hydrological properties of a sandy soil. There were five treatments with five replications. The experiment was laid in Randomized Complete Block Design. Data were collected on the following soil properties: cumulative infiltration amount (I), sorptivity (S), steady state infiltrability (Ko) and saturated hydraulic conductivity (Ks). At the end of the experiment the control plot recorded the highest values of I, S, and Ko as 257 mm, 3.90 mm/s1/2 and 0.07 mm/s, respectively. However the highest Ks was recorded as 1.72×10-4 on the sole NPK-incorporated plot which showed no significant difference from that recorded on the control plot (1.69×10-4). Conversely, the plot with 9 t/ha PM recorded the lowest I value (159 mm). In the same way, the incorporation of poultry manure led to a significant decrease in S, Ko and Ks. The lowest S value was recorded on the 7 t/ha plots as 2.34 mm/s1/2. However, Ko and Ks were lowest on the 9 t/ha plot as 0.04 mm/s1/2 and 1.17×10-4 mm/s, respectively. Overall, the mineral fertilizer did not show any significant improvement in any of the parameters. Poultry manure was therefore found to improve the hydrological properties of the sandy soil. The significant decreases in water entry and movement suggest that poultry manure application can minimize excessive leaching of plant nutrients in sandy soil.

Keywords: Poultry manure, NPK fertilizer, Saturated hydraulic conductivity, Steady state infiltrability, Sorptivity

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Physiological Studies on Moisture Stress Tolerance in Chickpea (Cicer Arietinum L.) Genotypes

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Abstract. Drought is a major constraint that limits seed yield in chickpea (Cicer arietinum L.). It is important to establish the relative importance many of these drought-related traits for prioritizing their consideration in breeding for drought tolerance improvements. The objective of this study was to categorize the drought tolerant and susceptible chickpea genotypes on the basis of physiological parameters. An experiment was conducted with five chickpea genotypes in field under irrigated and rain fed conditions. Observations were recorded on relative water content (RWC), and the contents of chlorophyll (Chl), carotenoid (Car), proline (Pro) and protein in the five chickpea genotypes. RWC and contents of Chl, Car and protein decreased under moisture stress, whereas Pro content increased with the increase in moisture stress. Pusa-1108, Pusa-362, Pusa-1103 were able to maintain relatively higher RWC, Chl, Car and protein content and greater Pro accumulation, while Flip 90-166 and SBD-377 showed comparatively greater decline in the RWC, Chl, Car and Protein and less accumulation of Pro under moisture stress. The data suggest that chickpea genotypes can be categorized into drought tolerant and susceptible types based on the variations in RWC, Chl, Car, Pro and protein content.

Keywords: Carotenoid, chickpea, chlorophyll, moisture stress, proline, protein, relative water content

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