Abstract
This study was carried out within the green house environment of the Faculty of Agriculture, Kogi State University (Latitude 7°.6 1 N and Longitude 7°.43 1 E) Anyigba in the Southern Guinea Savannah agro ecological zone of Nigeria during 2016 raining season. The experiment was laid using Randomized complete block design with 8 replicates. The treatment consisted of sesame, groundnut, wheat and bambaranut. Each treatment was repeated eight times, the results reveal K-coefficient for determination of leaf area to be 0.43, 0.62, 0.53 and 0.64 for sesame, groundnut, wheat and bambaranut respectively. The use of multiple regression equation improves the prediction over linear measurement. Also, simple and multiple regression analysis was carried out in other to increase precision in use of leaf area in the four treatments which are; sesame (Y=1563.632 + 0.409x 1 , Y= 1563.632 + 0.409x 1 -45.73x 2 ), groundnut (Y = -3175.794 + 0.611x 1 , Y= 3175.794+0.611x 1 +56.825x 2 ), wheat (Y= 376.084+0.265x 1 , Y=376.084+ 0.265x 1 -4.559x 2 ) and bambaranut (Y=162.603 + 0.615x 1 , Y=162.603 + 0.615x 1 +15.677x 2 ). The data on leaf area and leaf number value of all the four crops were fitted into linear regression analysis separately as well as combined data, it shows significant difference or improvement over the use of linear measurement. Keywords : K-Coefficient, Linear measurements, Simple and Multiple regression of Sesame, Wheat, Groundnut and Bambaranut. DOI: 10.7176/JBAH/10-12-04 Publication date: June 30 th 2020
Highlights
Leaf is an important plant organ, and is associated with photosynthesis evapotranspiration; leaf area measurements are required in most physiological and agronomic studies involving plant growth (Guo & Sun, 2001)
The average value obtained over four sampling www.iiste.org periods was 0.464, groundnut’s k-coefficient value varies between 0.60-0.64 for all the period of sampling, the average k-value obtained was 0.62 for 3, 6, 9, and 12 weeks sampling period respectively, k-value for wheat varies between 0.51-0.55, with an average value of 0.53, 0.55, 0.53, 0.53 for 3, 6, 9 and 12 weeks respectively sampling periods
K-coefficient for bambaranut varies between 0.59-0.65 with an average value of 0.64
Summary
Leaf is an important plant organ, and is associated with photosynthesis evapotranspiration; leaf area measurements are required in most physiological and agronomic studies involving plant growth (Guo & Sun, 2001). Estimation of leaf area is an essential component of plant growth analysis and evapo-transpirational studies. Leaf area is important for crop light interception and has a large influence on growth (Boote et al, 1988), transpiration (Enoch and Hurd, 1979) and growth rate (Leith et al, 1986). Leaf area production is essential for energy transfer and dry matter accumulation processes in crop canopies. It is useful in the analysis of canopy architecture as it allows determination of leaf area index, which is important for light interception, radiation use efficiency, plant growth, etc. Estimation of leaf area from mathematical models involving linear measurements of leaf is relatively accurate and non-destructive
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